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Dissertation
Mechanisms and consequences of SEI failure in advanced Li-ion batteries
Doctor of Philosophy (Ph.D.), Drexel University
Jun 2020
DOI:
https://doi.org/10.17918/00000052
Abstract
Accelerated capacity fade in high-voltage Li-ion batteries is attributed to crosstalk between the positive and negative electrodes causing parasitic reactions. Specifically, the concomitant electrolyte oxidation and transition metal dissolution (Mn, Ni and Co) from positive electrode active materials has been linked to capacity fade by disrupting the performance of the solid-electrolyte interphase (SEI). In full-cell studies, the effects of electrolyte decomposition and metal dissolution on battery lifetime and coulombic efficiency are well-documented, however the precise nature of crosstalk species and the mechanisms of capacity fade remain to be understood. Fundamental understanding of the role of each metal in undermining SEI passivation is necessary to mitigate this degradation and to enable commercialization of high-energy Li-ion batteries.
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Details
- Title
- Mechanisms and consequences of SEI failure in advanced Li-ion batteries
- Creators
- Oliver C. Harris
- Contributors
- Maureen Han-Mei Tang (Advisor)
- Awarding Institution
- Drexel University
- Degree Awarded
- Doctor of Philosophy (Ph.D.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Number of pages
- xviii, 109 pages
- Resource Type
- Dissertation
- Language
- English
- Academic Unit
- Chemical (and Biological) Engineering [Historical]; College of Engineering (1970-2026); Drexel University
- Other Identifier
- 991014695235604721