Improved performances of mechanical-activated LiMn2O4/MWNTs cathode for aqueous rechargeable lithium batteries

被引：0
作者：
Shengyao Chen
Changhuan Mi
Linghao Su
Bo Gao
Qingbin Fu
Xiaogang Zhang
机构：
[1] Nanjing University of Aeronautics and Astronautics,College of Material Science and Engineering
来源：
Journal of Applied Electrochemistry | 2009年 / 39卷
关键词：
LiMn; O; MWNTs; Mechanical activated; Rate capability;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
LiMn2O4/multi-walled carbon nanotubes (MWNTs) composite was synthesized by mechanical activation reaction followed by a heat-treatment (500 °C). The LiMn2O4 and LiMn2O4/MWNTs as cathodes were investigated in 1 M Li2SO4 by cyclic voltammetry (CV), galvanostatic charge/discharge (GC), and electrochemical impedance spectroscopy (EIS). The LiMn2O4/MWNTs cathode delivered higher discharge capacity (117 mAh g−1) than LiMn2O4 (84.6 mAh g−1). Furthermore, the results from EIS showed that LiMn2O4/MWNTs had a faster kinetic process for lithium ion intercalation/de-intercalation than LiMn2O4. Besides, LiMn2O4/MWNTs had better cycling stability and rate capability than LiMn2O4, which was confirmed by GC testing. SEM images showed that a three-dimensional network structure was formed during the mechanical activation, giving a decrease of particle size.
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页码：1943 / 1948
页数：5
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