An Electrochemical Behavior of LiMn₂O₄ Electrode in Electrolyte Based on Room Temperature Ionic Liquid

Authors

Hong-he ZHENG, College of Chemistry & Environmental Sciences, Henan Normal University, Xinxiang 453007, ChinaFollow
Lei SHI, College of Chemistry & Environmental Sciences, Henan Normal University, Xinxiang 453007, China
Shu-yan GAO, College of Chemistry & Environmental Sciences, Henan Normal University, Xinxiang 453007, China
Jian-ji WANG, College of Chemistry & Environmental Sciences, Henan Normal University, Xinxiang 453007, China

Corresponding Author

Hong-he ZHENG(hhzheng@mail.com)

Abstract

The electrochemical behavior of spinel LiMn₂O₄ electrode in ionic liquid electrolyte was investigated by using cyclic voltammetry, galvanostatic charge-discharge and ACimpedance techniques. The results reveal that the spinel LiMn₂O₄ can be effectively cycled in electrolyte based on the ionic liquid with discharge capacity of 108.2mAh/g and Coulombic efficiency of more than 90% in the first cycle at room temperature. Temperature and current density play an important role in the electrode performances. The activation energy for lithium ion transfer through interface between the electrode and the electrolyte was evaluated by AC impedance spectroscopy. The high activation energy accounts for the poor cell performance at low temperature and for its poor rate capability.

Keywords

Lithium ion batteries, Room temperature ionic liquid, Spinel LiMn2O4, AC impedance

DOI Link

https://doi.org/10.61558/2993-074X.1657

Publication Date

2005-08-28

Online Available Date

2005-08-28

Revised Date

2005-01-12

Received Date

2004-11-26

Recommended Citation

Hong-he ZHENG, Lei SHI, Shu-yan GAO, Jian-ji WANG. An Electrochemical Behavior of LiMn₂O₄ Electrode in Electrolyte Based on Room Temperature Ionic Liquid[J]. Journal of Electrochemistry, 2005 , 11(3): 298-303.
DOI: 10.61558/2993-074X.1657
Available at: https://jelectrochem.xmu.edu.cn/journal/vol11/iss3/11