溶解
阴极
锂(药物)
锰
电化学
电池(电)
化学计量学
过渡金属
作文(语言)
离子
电极
镍
分析化学(期刊)
分解
材料科学
电解质
无机化学
化学
锂离子电池
作者
Seoung-Bum Son,David C. Robertson,Yifen Tsai,Stephen Trask,Alison R. Dunlop,Ira Bloom
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2020-11-27
卷期号:167 (16): 160508-160508
被引量:4
标识
DOI:10.1149/1945-7111/abcb40
摘要
While LiNi x Mn y Co 1−x−y O 2 (NMC) is one of the most widely used cathode materials for lithium-ion batteries (LIBs), the composition of NMC is evolving to Ni-rich NMC to achieve higher lithium capacity that fulfills the constant demand for LIBs with ever-higher energy densities. The change in the composition of NMC affects electrochemical features and electrode cross-talk, which explains the performance change during cycling. In this study, we introduce various NMC materials (LiNi 0.5 Mn 0.3 Co 0.2 O 2 , LiNi 0.6 Mn 0.2 Co 0.2 O 2 and LiNi 0.8 Mn 0.1 Co 0.1 O 2 ) to reveal how the NMC composition affects electrode cross-talk. The study reveals that NMC composition strongly affects transition metal dissolution; dissolution of manganese linearly decreases as its stoichiometric ratio in NMC decreases, while dissolution of nickel is only prominent in LiNi 0.8 Mn 0.1 Co 0.1 O 2 . Aged electrolyte samples are characterized with high-performance liquid chromatography, and two electrolyte decomposition species, C 8 H 16 O 5 and C 9 H 18 O 5 , are identified across all samples.
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