期刊
ACS APPLIED ENERGY MATERIALS
卷 5, 期 12, 页码 15491-15501出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.2c03065
关键词
nonflammable electrolyte; Li+ solvation structure; electrode; electrolyte interphase; thermodynamics; kinetics
资金
- Intergovernmental International Science and Technology Innovation Cooperation Project
- National Natural Science Foundation of China
- 21C Innovation Laboratory, Contemporary Amperex Tech-nology Ltd
- [2019YFE0100200]
- [22179101]
- [21C-OP-202202]
In this study, a nonflammable electrolyte was designed for lithium-ion batteries, which achieve high performance and stable cycling through modulation of Li+ solvation structure. Furthermore, a dual-salt strategy was proposed to enhance the performance of the battery, and the functions and relationship of Li+ solvation structure and electrode/electrolyte interphase were elucidated.
Trimethyl phosphate (TMP) is the most promising safe solvent for lithium-ion battery (LIB) electrolyte because of the nonflammability, oxidation stability, and low cost, but its application is hindered by incompatibility with the graphite anode. Herein, nonflammable electrolytes with ordinary concentration (1 mol L-1) are designed for graphite/LiNi0.8Co0.1Mn0.1O2 (Gr/NCM811) LIBs with TMP/2,2,2-trifluoroethyl methyl carbonate (FEMC) binary solvents. Stable cycling of the Li/Gr half cells with high capacity is achieved via modulation of the Li+ solvation structure. A dual-salt strategy of lithium hexafluorophosphate/lithium difluoro(oxalato)borate is further used to realize the high performance of the Gr/ NCM811 full cells. More significantly, the functions and relationship of Li+ solvation structure and electrode/electrolyte interphase are elucidated. Li+ solvation structure and interphase are respectively the thermodynamic and kinetic factors for the side reactions of the electrolyte occurring at the electrode/electrolyte interphase, which should be considered comprehensively in the design of electrolytes for high-energy density LIBs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据