期刊
ELECTROCHIMICA ACTA
卷 289, 期 -, 页码 422-427出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.09.085
关键词
Concentrated electrolytes; Dual salts; Dendrite growth; Al corrosion; Li-metal battery
资金
- National Key R&D Program of China [2018YFB0104204]
- National Natural Science Foundation of China [51674202, 51804259]
- Fundamental Research Funds for the Central Universities [G2016KY0307, 3102018jgc004]
- Key R&D Program of Shanxi [2017ZDCXL-GY-08-03]
Li-metal battery (LiMB) has received considerable attention as an alternative energy storage device to Li-ion battery in recent years. However, uncontrolled Li dendrite growth prevents the practical applications of LiMB. Herein, we report the use of concentrated electrolytes based on dual salts of lithium bis(fluorosulfonyl) imide (LiFSI) and lithium difluoro(oxalato) borate (LiODFB) to suppress Li dendrite growth. The compatibility of electrolyte and LiFePO4 cathode was further verified by the long capacity retention and high rate performance of Li/LiFePO4 battery. The superior electrochemical performance was attributed to the concentrated electrolyte, which could simultaneously suppress Li dendrite growth at the anode side and Aluminum (Al) current collector corrosion at the cathode side. This work provides new insights to develop high-performance LiMBs by carefully tailoring the multivariate composition of concentrated electrolyte. (C) 2018 Published by Elsevier Ltd.
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