期刊
CHINESE CHEMICAL LETTERS
卷 31, 期 12, 页码 3209-3212出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2020.05.006
关键词
Lithium difluorophosphate (LiPO2F2) solution; Electrolyte additives; Electrode-electrolyte interface; Synthesis; Li-ion batteries
资金
- National Natural Science Foundation of China [21935009, 21761132030, 21621091]
- National Key Research and Development Program of China [2018YFB0905400]
- Doctoral Research Foundation of Binzhou University [2016Y06]
Constructing a reliable and favorable electrode-electrolyte interface is crucial to utilize the exceptional energy storage capability in commercial lithium-ion batteries. Here, we report a facile synthesis approach for the lithium difluorophosphate (LiPO2F2) solution as an effective film-forming additive via direct adding the Li2CO3 into LiPF6 solution at 45 degrees C. Benefiting from the significantly reduced interface resistance (R-SEI) and charge transfer impedance (R-ct) of both the cathode and anode by adding the prepared LiPO2F2 solution into a baseline electrolyte, the cycling performance of the graphite's LiNi0.5Mn0.3Co0.2O2 pouch cell is remarkably improved under all-climate condition. (C) 2020 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
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