Highly Homogeneously Structured Lithium Ion Storage Electrodes Via Electrophoretic Deposition

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Highly Homogeneously Structured Lithium-ion Storage Electrodes Via Electrophoretic Deposition

Author : Marianna Uceda
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (119 download)

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Book Synopsis Highly Homogeneously Structured Lithium-ion Storage Electrodes Via Electrophoretic Deposition by : Marianna Uceda

Download or read book Highly Homogeneously Structured Lithium-ion Storage Electrodes Via Electrophoretic Deposition written by Marianna Uceda and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Improving lithium-ion battery performance is key in facilitating a green sustainable future. This has led to nanosizing of active materials as means to improve their conductivity by reducing the lithium-ion diffusion length. However, nanomaterials introduce a new challenge during the casting stage of lithium-ion battery electrode fabrication. This technique is unsuited for handling both nanosized and 2D-shaped materials as they introduce rheological challenges. Additionally, the current commercially available casting technique requires the use of a toxic and expensive organic solvent. Thus, the focus of this work was to investigate and design an alternative coating process using electrophoretic deposition (EPD). The work comprises three studies.In the first study, carbon-coated lithium titanate (LTO) nanoparticles and acetylene black were successfully made into highly-conductive composite anodes via EPD employing styrene butadiene rubber (SBR) as binder in an appropriately selected acetonitrile/water medium. The investigation characterized and optimized the effect of current density on particle movement and deposit growth producing thick mesoporous films on aluminum substrate. The EPD electrode performance was compared to electrodes prepared via the conventional tape-casting. For EPD electrodes, SEM imaging and EDS mapping showed excellent intermixing of carbon components and the active material. Via photoemission electron microscopy (PEEM) coupled with X-ray absorption near edge structure (XANES) it was revealed the SBR binder to be well dispersed within the coating, which translated to the electrode achieving superior rate cycling performance thanks to enhanced conductivity enabled by the hetero-assembling power of electrophoretic deposition.In the second study, EPD was innovatively applied to fabricate binder-less nanolayered lithium titanate and reduced graphene oxide (rGO) composite coatings as high-performance Li-ion anodes. This was accomplished by electrophoretically depositing 2D shaped lithium titanate hydrate (LTH) and graphene oxide (GO) precursors and subsequent high temperature reducing annealing to induce the topotactic transformation of LTH into LTO and GO into the so-called rGO. As graphene is difficult to successfully suspend, using the functionalized precursor circumvented this problem. The EPD electrodes are compared to conventionally prepared electrodes with rGO and carbon black. Cross-sectional imaging and EDS mapping showed the EPD electrodes contained a homogeneous coating with the rGO acting as a conductive medium and binder which helped organize the LTO nanosheets into a well built and adherent film. As a result, the EPD nanolayered electrode was found to exhibit superior electrochemical performance in terms of power capability, cyclability and impedance when compared to conventionally prepared electrode. The final study featured titanium niobate (TNO, TiNb2O7), this material is a promising replacement anode material for LTO with the potential to deliver higher capacities. Binder-less TNO/rGO electrodes were made through adapting the EPD method developed for the second study – co-depositing TNO and GO followed by high temperature annealing to induce GO to rGO transformation. The final composition of EPD coatings contained 18 wt% rGO which was compared to conventionally prepared electrodes containing 18 wt% rGO and 10 wt% rGO. The rGO was determined in addition to acting as binder and conductive component to have pseudocapacitive contributions to lithium-ion storage. The improved homogeneity in the EPD electrodes allowed better performance in terms of capacity level and retention, i.e. reduced capacity fade in comparison to PVDF-built electrodes of similar composition. Overall, through these integrated electrode construction and electrochemical performance analysis studies, EPD is shown to be a superior coating technology with great application potential in manufacturing advanced LIB electrodes"--

Microstructured Electrodes for Electrochemical Energy Storage

Author : Leland Cramer Smith
Publisher :
ISBN 13 :
Total Pages : 202 pages
Book Rating : 4.:/5 (17 download)

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Book Synopsis Microstructured Electrodes for Electrochemical Energy Storage by : Leland Cramer Smith

Download or read book Microstructured Electrodes for Electrochemical Energy Storage written by Leland Cramer Smith and published by . This book was released on 2015 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lithium-ion batteries and electric double-layer capacitors are two types of electrochemical energy storage devices that are characterized by high energy density and high power density, respectively. While these technologies have been successfully applied in applications such as personal electronics and electric vehicles, the potential for microscale energy storage devices remains unrealized. In this dissertation novel materials and processing methods are introduced for the fabrication of microscale lithium-ion batteries and electric double-layer capacitors. In the area of electric double-layer capacitors, carbon electrodes are fabricated by electrophoretic deposition and self-assembly and paired with a novel solid-state ionogel electrolyte. We successfully fabricate an on-chip electric double-layer capacitor that is just 0.14 mm2 in electrode area, which is about 40 times smaller than any device so far reported in the literature. Microscale lithium-ion battery electrodes are prepared by micro-molding techniques. The composition of the anode and cathode are tuned to maximize mechanical durability, electronic and ionic conductivity. SU-8 photoresist is presented as a novel electrolyte material for conformally patterning 3D anode arrays. Both 2D and 3D lithium-ion batteries using SU-8 are presented. Initial results suggest that a working 3D microbattery based on SU-8 electrolyte is feasible. Finally, more fundamental research is presented on the sol-gel encapsulation of lithium-polysulfide liquid catholytes. By carefully tuning the non-hydrolytic sol-gel reaction, water-reactive lithium-polysulfides are successfully encapsulated to form a polysulfide gel that retains its lithium storage activity. This polysulfide gel is used to fabricate a fully solid-state lithium-sulfur battery.

Electrophoretic Deposition of Binder Free Electrodes for Lithium Ion Batteries

Author : Rebecca Ruth Mangham
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis Electrophoretic Deposition of Binder Free Electrodes for Lithium Ion Batteries by : Rebecca Ruth Mangham

Download or read book Electrophoretic Deposition of Binder Free Electrodes for Lithium Ion Batteries written by Rebecca Ruth Mangham and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Structural Engineering of Lithium-ion Battery Electrodes for the Production of Stable, Energy-dense Storage

Author : Jason Alexander Weeks
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (139 download)

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Book Synopsis Structural Engineering of Lithium-ion Battery Electrodes for the Production of Stable, Energy-dense Storage by : Jason Alexander Weeks

Download or read book Structural Engineering of Lithium-ion Battery Electrodes for the Production of Stable, Energy-dense Storage written by Jason Alexander Weeks and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lithium-ion batteries (LIBs) have revolutionized many facets of our everyday life, enabling devices such as cell phones, laptops, and, most recently, electric vehicles to become everyday commodities for consumers. However, as the demands of consumers and the energy requirements of these devices continue to grow, so must the storage capabilities of LIBs. Unfortunately, the chemistry and design space of these devices has remained stagnant over the technology’s lifespan. Several energy-dense density chemistries, such as lithium metal, silicon, and tin, are highly regarded for their lithium storage capabilities,. Yet, the non-advantageous side effects of their lithiation/delithiation (dendrite formation, particle fracturing, excessive SEI growth, etc.) have prevented the practical implementation of these materials. As such, an investigation was conducted to determine how structural engineering can be used to help enable next-generation chemistries and electrode designs for higher energy-density LIBs. Lithium metal touts any anode's highest theoretical capacity and power density; however, the safety risks from dendrite formation, such as electrical short-circuiting and explosions, prevent its utilization. Employing a systematic approach to the characterization of the solid electrode interphase (SEI) displays how electrolyte composition influences the chemical makeup of the SEI and its resulting properties. These results demonstrate how the subsequent modulation of the SEI structure and composition can influence the electrochemical performance and lithium deposition morphology. Similarly, the purposeful design of alloying anode materials, like tin and lead, and their host structures can tune their performance and electrochemistry. Typically, the large mechanical stress from the volumetric expansion during lithiation causes severe capacity fade in these materials; however, implementing a carbonaceous scaffold can drastically increase the stability of these materials. In addition to examining new active materials, the structural engineering of the overall electrode is explored. Metal foil current collectors comprise approximately 15% of the total cell weight in traditional batteries. Implementing a templated slurry casting process using camphene enables the formation of free-standing electrodes with enhanced flexibility and rate capabilities. Compared to classical electrode designs, an increase of 25% in energy density can be achieved by eliminating the gravimetrically dense current collector and increasing lithiation site accessibility

Electrode Materials for Energy Storage and Conversion

Author : Mesfin A. Kebede
Publisher : CRC Press
ISBN 13 : 1000457869
Total Pages : 518 pages
Book Rating : 4.0/5 (4 download)

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Book Synopsis Electrode Materials for Energy Storage and Conversion by : Mesfin A. Kebede

Download or read book Electrode Materials for Energy Storage and Conversion written by Mesfin A. Kebede and published by CRC Press. This book was released on 2021-11-17 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of the latest developments and materials used in electrochemical energy storage and conversion devices, including lithium-ion batteries, sodium-ion batteries, zinc-ion batteries, supercapacitors and conversion materials for solar and fuel cells. Chapters introduce the technologies behind each material, in addition to the fundamental principles of the devices, and their wider impact and contribution to the field. This book will be an ideal reference for researchers and individuals working in industries based on energy storage and conversion technologies across physics, chemistry and engineering. FEATURES Edited by established authorities, with chapter contributions from subject-area specialists Provides a comprehensive review of the field Up to date with the latest developments and research Editors Dr. Mesfin A. Kebede obtained his PhD in Metallurgical Engineering from Inha University, South Korea. He is now a principal research scientist at Energy Centre of Council for Scientific and Industrial Research (CSIR), South Africa. He was previously an assistant professor in the Department of Applied Physics and Materials Science at Hawassa University, Ethiopia. His extensive research experience covers the use of electrode materials for energy storage and energy conversion. Prof. Fabian I. Ezema is a professor at the University of Nigeria, Nsukka. He obtained his PhD in Physics and Astronomy from University of Nigeria, Nsukka. His research focuses on several areas of materials science with an emphasis on energy applications, specifically electrode materials for energy conversion and storage.

Electrodes for Li-ion Batteries

Author : Laure Monconduit
Publisher : John Wiley & Sons
ISBN 13 : 1119007372
Total Pages : 102 pages
Book Rating : 4.1/5 (19 download)

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Book Synopsis Electrodes for Li-ion Batteries by : Laure Monconduit

Download or read book Electrodes for Li-ion Batteries written by Laure Monconduit and published by John Wiley & Sons. This book was released on 2015-06-02 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: The electrochemical energy storage is a means to conserve electrical energy in chemical form. This form of storage benefits from the fact that these two energies share the same vector, the electron. This advantage allows us to limit the losses related to the conversion of energy from one form to another. The RS2E focuses its research on rechargeable electrochemical devices (or electrochemical storage) batteries and supercapacitors. The materials used in the electrodes are key components of lithium-ion batteries. Their nature depend battery performance in terms of mass and volume capacity, energy density, power, durability, safety, etc. This book deals with current and future positive and negative electrode materials covering aspects related to research new and better materials for future applications (related to renewable energy storage and transportation in particular), bringing light on the mechanisms of operation, aging and failure.

Nanostructured Composite Electrodes for Lithium Batteries (Final Technical Report).

Author : James Gole Meilin Liu
Publisher :
ISBN 13 :
Total Pages : 248 pages
Book Rating : 4.:/5 (316 download)

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Book Synopsis Nanostructured Composite Electrodes for Lithium Batteries (Final Technical Report). by : James Gole Meilin Liu

Download or read book Nanostructured Composite Electrodes for Lithium Batteries (Final Technical Report). written by James Gole Meilin Liu and published by . This book was released on 2006 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to explore new ways to create nanostructured electrodes for rechargeable lithium batteries. Of particular interests are unique nanostructures created by electrochemical deposition, etching and combustion chemical vapor deposition (CCVD). Three-dimensional nanoporous Cu6Sn5 alloy has been successfully prepared using an electrochemical co-deposition process. The walls of the foam structure are highly-porous and consist of numerous small grains. This represents a novel way of creating porous structures that allow not only fast transport of gas and liquid but also rapid electrochemical reactions due to high surface area. The Cu6Sn5 samples display a reversible capacity of {approx}400 mAhg-1. Furthermore, these materials exhibit superior rate capability. At a current drain of 10 mA/cm2(20C rate), the obtainable capacity was more than 50% of the capacity at 0.5 mA/cm2 (1C rate). Highly open and porous SnO2 thin films with columnar structure were obtained on Si/SiO2/Au substrates by CCVD. The thickness was readily controlled by the deposition time, varying from 1 to 5 microns. The columnar grains were covered by nanoparticles less than 20 nm. These thin film electrodes exhibited substantially high specific capacity. The reversible specific capacity of {approx}3.3 mAH/cm2 was demonstrated for up to 80 cycles at a charge/discharge rate of 0.3 mA/cm2. When discharged at 0.9 mA/cm2, the capacity was about 2.1 mAH/cm2. Tin dioxide box beams or tubes with square or rectangular cross sections were synthesized using CCVD. The cross-sectional width of the SnO2 tubules was tunable from 50 nm to sub-micrometer depending on synthesis temperature. The tubes are readily aligned in the direction perpendicular to the substrate surface to form tube arrays. Silicon wafers were electrochemically etched to produce porous silicon (PS) with honeycomb-type channels and nanoporous walls. The diameters of the channels are about 1 to 3 microns and the depth of the channels can be up to 100 microns. We have successfully used the PS as a matrix for Si-Li-based alloy. Other component(s) can be incorporated into the PS either by an electroless metallization or by kinetically controlled vapor deposition.

Handbook of Nanoelectrochemistry

Author : Mahmood Aliofkhazraei
Publisher : Springer
ISBN 13 : 9783319152653
Total Pages : 0 pages
Book Rating : 4.1/5 (526 download)

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Book Synopsis Handbook of Nanoelectrochemistry by : Mahmood Aliofkhazraei

Download or read book Handbook of Nanoelectrochemistry written by Mahmood Aliofkhazraei and published by Springer. This book was released on 2015-11-03 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited book is devoted to different electrochemical aspects of nano materials. This comprehensive reference text is basically divided in 3 parts: electrochemical synthesis routes for nanosized materials, electrochemical properties of nano materials and electrochemical characterization methods for nanostructures. The Handbook is a reference work to chemists and materials scientists interested in the nano aspects of electrochemistry. The chapters are written by a number of international experts in the field and the content will assist members of both electrochemical and materials communities to keep abreast of developments in the field.

Advanced Nanomaterials for Electrochemical-Based Energy Conversion and Storage

Author :
Publisher : Elsevier
ISBN 13 : 0128145587
Total Pages : 454 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Advanced Nanomaterials for Electrochemical-Based Energy Conversion and Storage by :

Download or read book Advanced Nanomaterials for Electrochemical-Based Energy Conversion and Storage written by and published by Elsevier. This book was released on 2019-08-15 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Nanomaterials for Electrochemical-Based Energy Conversion and Storage covers recent progress made in the rational design and engineering of functional nanomaterials for battery and supercapacitor applications in the forms of electrode materials, separators and electrolytes. The book includes detailed discussions of preparation methods, structural characterization, and manipulation techniques. Users will find a comprehensive illustration on the close correlation between material structures and properties, such as energy density, power density, cycle number and safety. Provides an overview on the application of nanomaterials for energy storage and power systems Includes a description of the fundamental aspects of the electrochemical process Explores the new aspects of electrolyte and separator systems

Fabrication and Characterization of Li-ion Electrodes for High-Power Energy Storage Devices

Author : Chun-Han Lai
Publisher :
ISBN 13 :
Total Pages : 135 pages
Book Rating : 4.:/5 (14 download)

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Book Synopsis Fabrication and Characterization of Li-ion Electrodes for High-Power Energy Storage Devices by : Chun-Han Lai

Download or read book Fabrication and Characterization of Li-ion Electrodes for High-Power Energy Storage Devices written by Chun-Han Lai and published by . This book was released on 2017 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Renewable energy technologies have been a rapidly emerging option to meet future energy demand. However, their systems require stable, high-power storage devices to overcome fluctuating energy outputs for consistent distribution. Since traditional Li-ion batteries (LIB) are not considered to be capable of fast charging and discharging, we have to develop devices with new chemistry for high-power operation. This dissertation focuses on the development of supercapacitors and high-rate batteries using a pseudocapacitor material, Nb2O5. In first part of this dissertation, a high-energy density Li-ion supercapacitor is developed on the basis of the fast-redox reactions of Nb2O5. By incorporating porous carbon components, the resulting Nb2O5 hybrid electrode performs fast charge storage through mixed pseudocapacitance-electrical double layer (EDL) mechanisms. By understanding interactions between the mechanisms, we are able to design a better hybrid capacitor with both high power and energy density. The second part of this dissertation shows the benefit of using a conductive poly(3-hexylthiophene-2,5-diyl) (P3HT) coating to lessen the surface degradation problems experienced by LiNi0.8Co0.15Al0.05O2 (NCA). The pseudocapacitive properties of P3HT films are important as they not only provide very good electrical and ionic conductivity, but also suppress the surface degradation of NCA. The improved kinetics and chemical stability allow NCA to be coupled with Nb2O5 in a full cell device. The third part of this dissertation involves an investigation of another potential high-rate cathode, Na3(VO)2(PO4)2F (NVOPF), for Li-ion storage. NVOPF particles are solvothermally synthesized into different morphologies, followed by electrochemical Li-ion exchange in a Li electrolyte. As a NASICON derivative, we find the same structure can be further adapted to improve Li-ion transport and energy storage which lead to higher capacity and better kinetics. In the last part of this dissertation, we focus on the construction of Nb2O5-based full cell devices. Lithium manganese oxide (LMO), NVOPF, and NCA are paired with Nb2O5 to make prototype high power Li-ion batteries. These devices are capable of storing charge very rapidly by retaining the charge storage mechanisms of the fundamental material. The successful fabrication of Nb2O5-based high-rate batteries and hybrid capacitors demonstrates the effectiveness of incorporating Nb2O5 in high-power energy storage devices.

Nano-structured Electrode Concepts for High-performance Lithium-ion Batteries

Author : Rahul Mukherjee
Publisher :
ISBN 13 :
Total Pages : 212 pages
Book Rating : 4.:/5 (115 download)

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Book Synopsis Nano-structured Electrode Concepts for High-performance Lithium-ion Batteries by : Rahul Mukherjee

Download or read book Nano-structured Electrode Concepts for High-performance Lithium-ion Batteries written by Rahul Mukherjee and published by . This book was released on 2014 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Handbook of Battery Materials

Author : Claus Daniel
Publisher : John Wiley & Sons
ISBN 13 : 3527637192
Total Pages : 973 pages
Book Rating : 4.5/5 (276 download)

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Book Synopsis Handbook of Battery Materials by : Claus Daniel

Download or read book Handbook of Battery Materials written by Claus Daniel and published by John Wiley & Sons. This book was released on 2012-12-21 with total page 973 pages. Available in PDF, EPUB and Kindle. Book excerpt: A one-stop resource for both researchers and development engineers, this comprehensive handbook serves as a daily reference, replacing heaps of individual papers. This second edition features twenty percent more content with new chapters on battery characterization, process technology, failure mechanisms and method development, plus updated information on classic batteries as well as entirely new results on advanced approaches. The authors, from such leading institutions as the US National Labs and from companies such as Panasonic and Sanyo, present a balanced view on battery research and large-scale applications. They follow a distinctly materials-oriented route through the entire field of battery research, thus allowing readers to quickly find the information on the particular materials system relevant to their research.

Process-structure-property Relationships of Ultra-thick Positive Electrodes for High-energy Lithium-ion Batteries

Author : Lea Sophie Kremer
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (126 download)

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Book Synopsis Process-structure-property Relationships of Ultra-thick Positive Electrodes for High-energy Lithium-ion Batteries by : Lea Sophie Kremer

Download or read book Process-structure-property Relationships of Ultra-thick Positive Electrodes for High-energy Lithium-ion Batteries written by Lea Sophie Kremer and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Fast-charging Electrodes for Next-generation Electrochemical Energy Storage Devices

Author : Yunkai Luo
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)

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Book Synopsis Fast-charging Electrodes for Next-generation Electrochemical Energy Storage Devices by : Yunkai Luo

Download or read book Fast-charging Electrodes for Next-generation Electrochemical Energy Storage Devices written by Yunkai Luo and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The advancement of battery technology not only enables the creation of lighter and more durable electronic devices and long-range, long-life electric vehicles but also enhances the efficiency of sustainable clean energy storage, thereby mitigating the climate crisis of global warming. In 2019, lithium-ion batteries (LIB) technology was awarded the Nobel Prize in Chemistry, recognizing its significant improvement in our lives, and bringing us a rechargeable green world. The overarching research theme in this dissertation is the development of the next generation of electrochemical energy storage devices that provide high-capacity and can be fast-charged. This development requires the exploration of innovative fast-charging battery electrodes, which are the critical component that enables the battery to supply power rapidly. The bronze phase materials investigated in this dissertation meet this criterion as they contain large lithium-ion diffusion channels which enable fast-charging anode materials for LIBs. Comparative electrochemical studies conducted for bronze phase materials with the same stoichiometry, but different compositions (Mo3Nb2O14 vs W3Nb2O14), offer valuable insights into the design of next-generation, fast-charging materials for LIBs. A second material system, Mo4O11, also possesses properties appropriate for a fast-charging anode material for LIBs. Although the original open structure of Mo4O11 was altered during the first lithiation process, the newly formed layer-like structure was able to achieve both high capacity and fast-charging capability. These studies show that designing materials with rapid ion diffusion pathways and selecting transition metals with multielectron redox capability offer a promising way for simultaneously achieving both high energy and power density in next-generation electrochemical energy storage devices. Another important consideration which plays a vital role in obtaining high-performance batteries is the structure of the electrode. With the increase of mass loading or thickness of tape-cast electrodes, the energy density of batteries is enhanced due to the incorporation of more active materials. However, above a certain thickness, the increasing tortuosity of both ion and electron transport in traditional tape-cast electrodes compromises the power and offsets the benefits of increasing the amount of active material. Leveraging 3D printing technology, it is possible to design intricate 3D electrode structures that establish macroscopic ion-diffusion pathways, thereby breaking the limits achieved with thick tape-cast electrodes. The approach taken in this dissertation is based on obtaining ultra-high mass loading of manganese dioxide (MnO2) on 3D-printed graphene aerogel (3D MnO2/GA) electrodes. For these studies, sodium-ion batteries (SIB) were investigated as the combination of earth-abundant, high mass loading of MnO2 and sodium-ion battery technology creates a cost-effective solution for fulfilling the increasing demands of grid-level energy storage. An ether-based electrolyte was shown to improve the cycling stability of MnO2 compared to several other non-aqueous electrolytes. The feasibility of this approach to obtain both excellent areal energy and power density was demonstrated using a high mass loading TiO2-MnO2 sodium ion battery. The results of this research not only underscore the significance of using 3D-printed electrodes to achieve high energy and fast-charging next-generation electrochemical energy storage devices, but also the use of 3D-printed electrodes to achieve the high mass loading desired for reducing the manufacturing costs for batteries. A related research topic on the properties of pseudocapacitive vanadium dioxide (VO2) with 3D printed graphene aerogel scaffold was designed to evaluate the scalability of 3D electrode structures. The areal capacity of 3D VO2/GA was found to scale with the increase of both mass loading and electrode thickness with only minor sacrifice of gravimetric capacity. The device level scalability of 3D electrodes and the feasibility of using thick 3D electrodes in a commercial electrochemical energy storage device was demonstrated using a pseudo-solid silica-based ionogel material. The resulting sodium metal battery demonstrated scalable areal energy density using a coin cell. The results of this dissertation, which include both the design of advanced electrode materials and development of 3D electrodes, provide a basis for the development of the next generation of electrochemical energy storage devices that exhibit high-capacity and fast-charging.

Lithium-ion Batteries

Author : Perla B. Balbuena
Publisher : World Scientific
ISBN 13 : 1860943624
Total Pages : 424 pages
Book Rating : 4.8/5 (69 download)

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Book Synopsis Lithium-ion Batteries by : Perla B. Balbuena

Download or read book Lithium-ion Batteries written by Perla B. Balbuena and published by World Scientific. This book was released on 2004 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: This invaluable book focuses on the mechanisms of formation of a solid-electrolyte interphase (SEI) on the electrode surfaces of lithium-ion batteries. The SEI film is due to electromechanical reduction of species present in the electrolyte. It is widely recognized that the presence of the film plays an essential role in the battery performance, and its very nature can determine an extended (or shorter) life for the battery. In spite of the numerous related research efforts, details on the stability of the SEI composition and its influence on the battery capacity are still controversial. This book carefully analyzes and discusses the most recent findings and advances on this topic.

Fundamental Understanding and Materials Design Approaches for Lithium-oxygen Electrochemical Energy Storage

Author : Betar Maurkah Gallant
Publisher :
ISBN 13 :
Total Pages : 182 pages
Book Rating : 4.:/5 (86 download)

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Book Synopsis Fundamental Understanding and Materials Design Approaches for Lithium-oxygen Electrochemical Energy Storage by : Betar Maurkah Gallant

Download or read book Fundamental Understanding and Materials Design Approaches for Lithium-oxygen Electrochemical Energy Storage written by Betar Maurkah Gallant and published by . This book was released on 2013 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: New strategies and materials are needed to increase the energy and power capabilities of lithium storage devices for electric vehicle and grid-scale applications. Systems based on oxygen electrochemistry are promising due to the relatively high potentials (~ 3 V vs. Li) of Li-oxygen redox couples, which can enable high energy to be stored in the absence of heavy and expensive transition metal-based compounds used in conventional Li-ion battery electrodes. This thesis explores two strategies to incorporate Li-oxygen redox electrochemistry into electrodes for high-power or high-energy devices: (1) oxygen functionalization of carbon surfaces for fast surface Li storage, and (2) bulk oxygen reduction and Li storage in Li-air batteries with a theoretical cell-level gravimetric energy up to 4 times higher than Li-ion batteries. First, we study the charge storage mechanisms in oxygen-functionalized multiwalled carbon nanotube (MWNT) positive electrodes for high-power Li batteries. Thin-film (below 3 im) electrodes are used as a platform for probing the kinetics of surface redox reactions between Li+ and oxygen on MWNTs in asymmetric and symmetric cell configurations. We next extend this concept to the development of freestanding electrodes with more practical thicknesses (tens of pm). By varying the MWNT functionalization time, we show that the surface oxygen concentration can be controlled to yield electrodes with tunable energy and power characteristics, with typical gravimetric energies of ~200 Wh/kgelectode at ~10 kW/kgeectrode. The second part of this thesis investigates fundamental and design considerations to enable development of Li-air battery electrodes with high gravimetric energy, improved round-trip efficiency, and increased stability upon cycling. Using aligned carbon nanofiber (CNF) or nanotube (CNT) electrodes synthesized in-house, we report the first observations of Li2O2 particle formation and shape evolution during discharge. Highly porous (> 90% void volume) CNF electrodes achieve one of the highest gravimetric energies (2400 Wh/kgdischarged at 30 W/kgdischarged) to date, demonstrating the role of electrode structure in realizing the theoretical energy advantage of Li-air systems at the laboratory scale. We next use CNT electrodes as a platform for studying chemical and morphological changes occurring in the electrode during cycling, and find that poor cycle life can be attributed to gradual accumulation of parasitic Li2CO3 promoted by reactivity of the carbon substrate. Finally, we study the influence of Li2O2 discharge rate-dependent structure and surface chemistry on the oxidation kinetics to probe the fundamental origins of high overpotentials required on charge. An integrated morphological, chemical, and electrochemical approach highlights new considerations for the design of practical electrodes for increased round-trip efficiency and improved cycle life.

2D Materials for Energy Storage and Conversion

Author : Suresh C. Pillai
Publisher : IOP Publishing Limited
ISBN 13 : 9780750333177
Total Pages : 200 pages
Book Rating : 4.3/5 (331 download)

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Book Synopsis 2D Materials for Energy Storage and Conversion by : Suresh C. Pillai

Download or read book 2D Materials for Energy Storage and Conversion written by Suresh C. Pillai and published by IOP Publishing Limited. This book was released on 2021-11-28 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference text provides a comprehensive overview of the latest developments in 2D materials for energy storage and conversion. It covers a wide range of 2D materials and energy applications, including 2D heterostructures for hydrogen storage applications, cathode and anode materials for lithium and sodium-ion batteries, ultrafast lithium and sodium-ion batteries, MXenes for improved electrochemical applications and MXenes as solid-state asymmetric supercapacitors. 2D Materials for Energy Storage and Conversion is an invaluable reference for researchers and graduate students working with 2D materials for energy storage and conversion in the fields of nanotechnology, electrochemistry, materials chemistry, materials engineering and chemical engineering. Key Features: Provides a comprehensive overview of the latest developments in 2D materials for energy storage and conversion technologies Covers the most promising candidates for radically advanced energy storage Covers 2D heterostructures and provides a holistic view of the subject Includes 2D materials beyond graphene, defects engineering, and the main challenges in the field