Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 48 for “"specific capacity"”.
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Electrospun Titanium Dioxide and Silicon Composite Nanofibers for Advanced Lithium Ion Batteries
… nanofibers showed a low but stable specific capacity. Si Nanoparticles demonstrated an initially high but fast degrading capacity. In contrast, silicon in SiNP/C/TiO<sub>2</sub> nanofibers with sulfur as a template exhibits an impressive high specific capacity of ~3459 mAh …
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Effects of Water-Soluble Binders on Direct Ink Writing Silicon Anode in Lithium-Ion Batteries
… has limited availability, and the theoretical specific capacity is only 327 mAh/g. Studying materials that are more economical and have higher theoretical capacity material has been of importance for recent research and silicon (Si) has been one of the best viable contenders for it. Si is not …
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Aligning tool set metrics for operation in a Multi Technology High Mix Low Volume manufacturing environment
… To avoid errors in estimating metrics, specific capacity tool set metrics for this manufacturing environment now need to be considered. Approximations for high volume manufacturing may be far enough from MT-HMLV realities that company revenue is affected by making delivery commitments …
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NANOSTRUCTURED MATERIALS FOR ALKALIS ION BATTERIES AND THEIR MECHANISTIC STUDIES
… novel composite cathode or anode materials high specific capacity, high rate capability, especially stability and capacity retention when battery undergoes an extreme charging process as indicated recently. The first part of this thesis aims to demonstrate some new approaches in the design of …
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Investigation of non-intercalation electrode materials for next-generation batteries
… the reaction kinetics and enables a high specific capacity by providing an efficient electron pathway to the insulating FeF2 and shortening Li diffusion length. Al2O3 coating appears to improve the cycle life significantly as it prevents the side reaction by limiting the direct contact of …
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Synthesis and characterization of nanostructured materials for Li-ion secondary batteries
… cost, low environmental impact, as well as high specific performance batteries are needed. Even so, intensive efforts are still under way to further improve this relatively young systems. Actually, for the next generation of rechargeable lithium-ion batteries, further breakthroughs, especially in …
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Electrocatalysis In Li-S Batteries
… in electrochemical properties such as specific capacity, rate capability, coulombic efficiency etc. and corroborate our findings with systematic experimental studies. Interaction between electrocatalyst and polysulfides has been evaluated by conducting X-ray photoelectron spectroscopy …
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Ordered macroporous metal oxides and carbonaceous composites for Li-ion and beyond Li-ion batteries
… three-dimensional ordered macroporous materials, specifically inverse opal materials, for electrochemical energy storage systems, particularly rechargeable batteries. Exploring the potential of composite structures, this research focuses on TiO2/GeO2 nanocomposites and C/TiO2 inverse opal anodes …
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ON THE AEROSOL SYNTHESIS OF HIERARCHICAL HYBRID CARBON NANOTUBE NANOMATERIALS FOR LITHIUM-ION BATTERIES
… above, and it was found that, fortunately, the specific neutraliser used in this work was likely to generate an equilibrium charge distribution, but that it may not be the case of other common aerosol neutralisers. Finally, we investigate the application of CNTSUs as conversion anode for Li-ion …
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In situ investigation of electrochemical surface stress development in rechargeable batteries
… deliver around one hundred to two hundred in specific capacity. The operating voltage is around three to five vs. lithium. The current inorganic-compound cathodes have several challenges such as limited reserves and harmfulness to the environment due to the toxic materials released from …
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SURFACE MODIFICATION TO IMPROVE THE ELECTROCHEMICAL PERFORMANCE OF CATHODE MATERIALS FOR LITHIUM-ION BATTERIES AND SODIUM-ION BATTERIES
<p>"The specific capacity of active materials as well as their cycling stability are the main limiting factors for the performance of lithium-ion batteries (LIBs) and sodium-ion batteries (SIB). Atomic layer deposition (ALD) is considered as a promising surface modification method to enhance the …
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Enhancing the economics of satellite constellations via staged deployment and orbital reconfiguration
… satellites is to optimize the design for a specific global capacity. This approach is based on a forecast of the expected number of users and their activity level, both of which are highly uncertain. It can lead to economic failure if the actual demand is smaller than the one predicted. This …
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Synthesis and characterization of novel fluoride and oxide cathodes for rechargeable batteries
… reaction paths. As with other fluorides, specific capacity was strongly linked with processing conditions. The layered lithium-excess . . . compounds were designed from recent understanding of diffusion channels in lithium-excess materials. Increasing lithium content was found to improve …
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Development Of Silicon-Based Anodes And In-Situ Characterization Techniques For Lithium Ion Batteries
… of lithium ion batteries (LIBs) with higher capacity has been booming worldwide, as growing concerns about environmental issues and increasing petroleum costs. The demands for the LIBs include high energy and power densities, and better cyclic stability in order to meet a wide range of …
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Study Of Tin-Based Electrodes And Ionic Liquid Electrolytes For Energy Storage Materials
… as particle size/inter-particle spacing on the specific capacity, rate capability, and cycling performance. These studies provide insights into design and development of anode materials for high power Li-ion batteries.</p> <p>One of the biggest challenges hindering development of rechargeable, …
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Sulfur-Based Yolk-Shell Nanoparticles for Lithium Sulfur Batteries
… a cathode material due to its high theoretical specific capacity (1675 mA h g−1). However, there are still many technical limitations for Li-S batteries, like the dissolution of the intermediate polysulfide and the large volumetric expansion of the material in the cell upon lithiation (~80%). …
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A bio-inspired approach to increase device-level energy density
… has resulted in active materials with higher specific capacity, increased the voltage of batteries in order to store more energy per electron, and lead to the development of electrolytes and binders compatible with high-performance active materials. However, Lithium-Ion Batteries (LIB) are …
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Preparation and Electrochemical Testing of Flexible Carbon Nanofiber Electrodes from Electrospinning
… anode, the flexible electrode exhibited a specific capacity of 379 mAH g-1 at the 100th cycle and capacity retention was 97.4% relative to the fifth cycle. When applied as an active material support electrode for lithium ion battery cathodes, the carbon support was successfully utilized …
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Design, synthesis, and characterisation of transition-metal dicarboxylate anodes for lithium-ion batteries
… affect the overall electrochemical performance. Specifically examined were how the chemical and physical properties of the active material and the electrode formulation impact the nano and microstructure of the electrodes and the mechanism of Li insertion. This project addresses the ambiguity in …
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