High Throughput Electrochemical Screening of Phosphate-Rich Nonflammable Electrolytes in Lithium-Ion Batteries

被引:0
|
作者
Martin, Witness [1 ]
Job, Heather M. [1 ]
Liang, Yangang [1 ]
Feng, Ruozhu [1 ]
Gao, Peiyuan [1 ]
Liu, Dianying [1 ]
Zhong, Lirong [1 ]
Xiao, Jie [1 ,2 ]
Wang, Wei [1 ]
Wu, Bingbin [1 ]
机构
[1] Pacific Northwest Natl Lab, Richland, WA 99352 USA
[2] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98101 USA
关键词
batteries; -; Li-ion; high throughput; phosphate electrolyte; FLUORINATED ELECTROLYTES; TRIMETHYL PHOSPHATE; BASIS-SETS; LI-ION; PERFORMANCE; ADDITIVES; GRAPHITE; SOLVENT;
D O I
10.1149/1945-7111/ad7c81
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Frequent fires and explosions in lithium-ion batteries (LIBs) used in grid energy storage systems (ESS) highlight the necessity of revisiting nonflammable phosphate electrolytes as alternatives to the currently used flammable carbonates. However, previous studies have shown the difficulty of integrating phosphate solvents into LIB electrolytes due to compatibility issues with graphite. In this work, we developed a high-throughput (HTP) electrochemical characterization method, akin to pH test paper, to rapidly screen potential phosphate electrolytes and graphite materials. Through HTP screening, we identified 101 promising combinations out of 1,740. This number was reduced to 26 after testing in Li/Graphite half cells. The optimized phosphate-rich electrolyte (60 v% phosphate) with cosolvents demonstrated 300 stable cycles at 0.1 C in Graphite/LiFePO4 (LFP) full cells with thick electrodes (similar to 3.0 mAh cm-2), surpassing prior research findings. This unique HTP method provides a powerful tool to expedite the development of safe LIBs for ESS applications.
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页数:9
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