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 8 of 8 for “"Electrolyte degradation"”.
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Self-reporting of Mn ion dissolution and self-stabilization of cathode-electrolyte interface in lithium ion batteries
Battery degradation limits the lifespan of energy storage devices. This dissertation focuses on developing self-reporting strategies that enable in situ or operando characterization of cathodic Mn dissolution, which is a major cause of the capacity fade for some cathodes, and release of battery …
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Investigating Crossover in Aqueous Organic Redox Flow Batteries Using NMR Spectroscopy
… These batteries are composed of two aqueous electrolytes with organic redox-active material dissolved in solution. The two energy-storing electrolytes are separated by an ion-selective membrane; however, in practice the membrane is not perfectly selective. The wide-scale deployment of these …
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Electrochemical H insertion in Pd thin films
… A comparison between aqueous and solid electrolytes, temperature, and thin film vs. bulk Pd revealed that thinner films, lower temperatures, and aqueous electrolytes tended to promote higher achievable H content, with the highest H:Pd ratio observed being 0.96 ± 0.02. These results not …
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Synthesis and electrochemical studies of novel ionic liquid based electrolytes
… have received substantial interest as nonaqueous electrolytes in lithium ion- and metal-air batteries in recent years due to their low volatility, non-flammability, wide liquid range, and thermal stability characteristics. Towards developing a new generation of high specific energy lithium ion …
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Understanding Transition Metal Dissolution from Battery Materials with Solution NMR Methods
… dissolution of the transition metal(s) into the electrolyte solution. Transition metal dissolution can lead to cathode restructuring, electrolyte degradation, thickening of the anode solid electrolyte interphase, and loss of lithium from the active lithium inventory, ultimately causing battery …
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A Nuclear Magnetic Resonance Approach Towards Understanding Surface Modification and its Influence on Ni-rich Layered Oxides in Li-ion Batteries
… accessing this high capacity induces structural degradation and parasitic electrolyte reactions at the surface. One strategy to mitigate this problem is surface modification with coating materials like Al<sub>2</sub>O<sub>3</sub> – cycling life is extended but the fundamental reasons behind the …
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Novel Magnetic Resonance Techniques as Applied to Metallic Phases in Lithium-Ion Battery Electrodes
… how these structures impact the redox, degradation and failure mechanisms—is critical to the development of the next generation of LIB electrode materials. In this thesis, the nature of these semimetal/insulator to metal phase transitions and the electronic properties of the metallic …
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Application of ambient mass spectrometry in electrochemical systems
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