电解质
石墨
材料科学
电池(电)
分析化学(期刊)
化学工程
电极
化学
复合材料
色谱法
物理化学
物理
量子力学
工程类
功率(物理)
作者
Wentao Song,Jessie Harlow,Eric Logan,Helena Hebecker,Matthew Coon,Laurent Molino,Michel B. Johnson,J. R. Dahn,Michael Metzger
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2021-09-01
卷期号:168 (9): 090503-090503
被引量:32
标识
DOI:10.1149/1945-7111/ac1e55
摘要
A few weight percent of electrolyte additives can dramatically improve Li-ion battery performance and lifetime. A systematic investigation of a series of electrolyte additive formulations was performed on bimodal (BM) and single crystal (SC) LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NMC811)/artificial graphite (AG) pouch cells. Long-term cycling tests at different temperatures (20 °C, 40 °C, and 55 °C) and different upper cutoff voltages (4.06 V and 4.20 V) were performed. These tests results were combined with advanced characterization techniques like ultra-high precision charging (UHPC), ex-situ gas measurement, and automatic cell storage tests to rank the additives based on their effectiveness. Radar plots and a figure-of-merit (FOM) approach were further utilized to summarize results for the BM and SC NMC811/AG cells. This work provides a useful benchmark for those developing NMC811/graphite cells and gives important insights for future electrolyte additive studies.
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