添加剂辅助的新型双盐电解质实现锂金属电池的宽温度运行
Additive-Assisted Novel Dual-Salt Electrolyte Addresses Wide Temperature Operation of Lithium-Metal Batteries.
作者信息
Shangguan Xuehui, Xu Gaojie, Cui Zili, Wang Qinglei, Du Xiaofan, Chen Kai, Huang Suqi, Jia Guofeng, Li Faqiang, Wang Xiao, Lu Di, Dong Shanmu, Cui Guanglei
机构信息
Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, P. R. China.
Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, P. R. China.
出版信息
Small. 2019 Apr;15(16):e1900269. doi: 10.1002/smll.201900269. Epub 2019 Mar 8.
In this study, self-synthesized lithium trifluoro(perfluoro-tert-butyloxyl)borate (LiTFPFB) is combined with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) to formulate a novel 1 m dual-salt electrolyte, which contains lithium difluorophosphate (LiPO F ) additive and dominant carbonate solvents with low melting point and high boiling point. The addition of LiPO F into this novel dual-salt electrolyte dramatically improves cycleability and rate capability of a LiNi Mn Co O /Li (NMC/Li) battery, ranging from -40 to 90 °C. The NMC/Li batteries adopt a Li-metal anode with low thickness of 100 µm (even 50 µm) and a moderately high cathode mass loading level of 10 mg cm . For the first time, this paper provides valuable perspectives for developing practical lithium-metal batteries over a wide temperature range.
在本研究中，将自行合成的三氟（全氟叔丁氧基）硼酸锂（LiTFPFB）与双（三氟甲磺酰）亚胺锂（LiTFSI）相结合，配制出一种新型的1 m双盐电解质，该电解质含有二氟磷酸锂（LiPO₂F₂）添加剂以及具有低熔点和高沸点的主要碳酸盐溶剂。向这种新型双盐电解质中添加LiPO₂F₂可显著提高LiNi₀.₅Mn₀.₃Co₀.₂O₂/Li（NMC/Li）电池在-40至90°C范围内的循环性能和倍率性能。NMC/Li电池采用厚度为100 µm（甚至50 µm）的薄锂金属阳极和10 mg cm⁻²的适度高阴极质量负载水平。本文首次为在宽温度范围内开发实用的锂金属电池提供了有价值的观点。
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