期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 20, 页码 10900-10909出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta01253h
关键词
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资金
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning of Korea [2010-C1AAA001-0029018]
- Energy Efficiency & Resources Core Technology Program of the KETEP - Ministry of Trade, Industry Energy [20132020000260]
- Industrial Strategic Technology Development Program [10041589]
- IT R&D program - Ministry of Trade, Industry and Energy [10041856]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20132020000260, 10041856] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Tris(trimethylsilyl) phosphite (TMSP) is well known as an effective electrolyte additive that significantly improves the electrochemical performance of high-voltage lithium-ion batteries. This work reveals that TMSP is oxidized more readily than an electrolyte solvent, is more difficult to be reduced, and exhibits high reactivity with HF. The significant role of TMSP in HF removal is demonstrated by full-cell experiments. We suggest a mechanism through which TMSP removes HF molecules from the electrolyte, forms a cathode-electrolyte interphase with outstanding properties on the cathode surface while not undergoing a side reaction at the anode surface. In addition, the fact that TMSP can be oxidized more readily than vinylene carbonate is what results in the synergistic effect observed when the two additives are used together.
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