Electrolytes, SEI and Charge Discharge Kinetics of Li-ion Batteries

被引：18

作者：

Jow, T. R. ^{[1
]}

Allen, J. L. ^{[1
]}

Marx, M. ^{[1
]}

Nechev, K. ^{[2
]}

Deveney, B. ^{[2
]}

Rickman, S. ^{[2
]}

机构：

[1] USA, Res Lab, Adelphi, MD 20783 USA

[2] Saft Amer Inc, Cockeysville, MD 21030 USA

来源：

RECHARGEABLE LITHIUM-ION BATTERIES | 2010年 / 25卷 / 36期

关键词：

GRAPHITE/ELECTROLYTE INTERFACE; SOLVATION SHEATH;

D O I：

10.1149/1.3393833

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Charge discharge kinetics of Li-ion batteries is dominated by the lithium ion (Li+) charge transfer kinetics, which involves the process of transporting the solvated Li+ in the electrolyte to the insertion of Li+ and the accepting of an electron at the same time in the electrode active materials. The importance of electrolytes and recent studies of Li+ charge transfer kinetics were briefly reviewed. Using 3-electrode cells and a DC Pulse Current Impedance method, we examined the charge discharge kinetics of the anode and the cathode in the same electrolyte at the same time. We observed a slower kinetics at the graphitic carbon anode as indicated by higher activation energy than that at the lithium nickel cobalt aluminum mixed oxide (LiNi0.80Co0.15Al0.05O2) cathode. While desolvation is a dominating step as concluded in recent studies on the Li+ charge transfer kinetics, this study suggests that the nature of SEIs and electrode materials play crucial roles on Li+ charge discharge kinetics.

引用

页码：3 / 12

页数：10

共 16 条

[1] Functional electrolytes [J].