Electrochemical study on orthorhombic LiMnO2 as cathode in rechargeablelithium batteries

被引：28

作者：

Wang, GX ^{[1
]}

Yao, P ^{[1
]}

Zhong, S ^{[1
]}

Bradhurst, DH ^{[1
]}

Dou, SX ^{[1
]}

Liu, HK ^{[1
]}

机构：

[1] Univ Wollongong, Inst Superconducting & Elect Mat, Energy Storage Mat Program, Wollongong, NSW 2522, Australia

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 1999年 / 29卷 / 12期

关键词：

a.c. impedance spectroscopy; orthorhombic LiMnO2; rechargeable lithium battery;

D O I：

10.1023/A:1003877932598

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Orthorhombic LiMnO2 was synthesized via a solid-state reaction. Its electrochemical properties as cathode in lithium batteries were examined. It was found that initially, a few cycles are necessary to activate the electrochemical reactivity of o-LiMnO2, which is related to the transformation from the orthorhombic phase to a spinel-like phase. A maximum discharge capacity of 180-190 mA h g(-1) for o-LiMnO2 electrodes was achieved. An electrochemical impedance spectroscopy (EIS) study showed that the charge-transfer resistance (R-CT) for the initial o-LiMnO2 electrode is much larger than that for the o-LiMnO2 electrode in the charged state. The o-LiMnO2 electrode demonstrated a better cyclability than that of the spinel LiMn2O4 directly synthesized by solid-state reaction.

引用

页码：1423 / 1426

页数：4

共 20 条

[1] Synthesis of layered LiMnO2 as an electrode for rechargeable lithium batteries [J].