期刊
ELECTROCHIMICA ACTA
卷 114, 期 -, 页码 387-393出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.10.072
关键词
Lithim-ion batteries; Electrolytes; High-potential spinels; Fluoride; High temperature
资金
- Sangmyung University
- National Research Foundation of Korea
- Ministry of Education, Science, and Technology (MEST) of the Korean Government [NRF-2009-C1AAA001-2009-0093307]
- Korea Institute of Energy Technology and Planning (KETEP)
- Ministry of Knowledge Economy of the Korean Government [2012T100201571]
LiNi0.5Mn1.5O4, a cathode material for high potential applications, rapidly deteriorates at high temperatures. In this study, fluoride-containing additives are found to offer protection to the material in damaging temperature ranges. The results of investigations using a fluoride-rich pyrazole, fluoro-ethylene carbonate, trially cyanurate with multiple double bonds, and LiF explain the combined action of the protective layer and fluoride in promoting longer life cycles. Both fluoride in a protective film and free fluoride ions prevent LiF accumulation on the electrode, extending the life of the cathode material at high temperatures. (C) 2013 Elsevier Ltd. All rights reserved.
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