Dissertation
NANOMATERIALS DESIGN AND INTERPHASE CONTROL FOR HIGH PERFORMANCE SODIUM-ION BATTERIES
Doctor of Philosophy (PhD), Washington State University
01/2019
Handle:
https://hdl.handle.net/2376/110962
Abstract
Sodium-ion batteries (SIBs) as economical high energy alternatives to lithium-ion batteries (LIBs) have received significant attention for large-scale energy storage in the last few years. Materials specifically chosen and designed for SIB are critical to improve its performance and hence facilitate the transition from lab to market. Alloy or conversion-typed anode materials are attractive candidates of high specific capacity and low voltage potential, yet their applications are hampered by the large volume expansion and fast capacity fade. Nanostructured alloys have the privilege of alleviating the challenges of the large volume change and improving the cycling stability and rate performance for high energy SIBs. For sodium cathodes, the O3-type layered transition-metal oxides (O3-NaTMOs) with high specific capacity, tunable structure, and high tap density are expected as one of the most promising candidate cathodes towards practical applications. However, the O3-NaTMOs suffer from limited cycle life and poor air stability, similar to their Li analogues, if not even worse. The cathode-electrolyte-interphase (CEI) plays an indispensable role of controlling the surface phase transition and chemical reactivity for maximizing the cathode structure stability and battery performance. High resolution microscopic analyses reveal how the stability and ion transfer properties of CEI fundamentally determine the reversibility and efficiency of O3-NaTMOs. Stabilizing the cathode interphase layer requires careful design of electrolyte composition and proper selection of surface coating.
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Details
- Title
- NANOMATERIALS DESIGN AND INTERPHASE CONTROL FOR HIGH PERFORMANCE SODIUM-ION BATTERIES
- Creators
- Junhua Song
- Contributors
- Yuehe Lin (Advisor)Min-Kyu Song (Committee Member)Lei Li (Committee Member)David P Field (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- Materials Science and Engineering Program
- Theses and Dissertations
- Doctor of Philosophy (PhD), Washington State University
- Number of pages
- 133
- Identifiers
- 99900581618401842
- Language
- English
- Resource Type
- Dissertation