High performance Li-O2 battery using γ-MnOOH nanorods as a catalyst in an ionic-liquid based electrolyte

被引：35
|
作者：
Guo, Ziyang
Zhu, Guannan
Qiu, Zijie
Wang, Yonggang [1 ]
Xia, Yongyao
机构：
[1] Fudan Univ, Dept Chem, Inst New Energy, Shanghai 200433, Peoples R China
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2012年 / 25卷
基金：
中国国家自然科学基金;
关键词：
gamma-MnOOH nanorods; Ionic-liquid based electrolyte; Li-O-2; battery; LITHIUM-AIR BATTERIES; ELECTROCATALYTIC ACTIVITY; GRAPHENE NANOSHEETS; DISCHARGE;
D O I：
10.1016/j.elecom.2012.09.022
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Li-O-2 batteries using the ionic-liquid based electrolyte consisting of 1-ethyl-3-methylimidazolium tetrafluoroborate and lithium bis((trifluoromethyl)sulfonyl)imide were investigated with carbon catalyst (Super P), alpha-MnO2 nanorods/carbon composite catalyst (Super P + alpha-MnO2) and gamma-MnOOH nanorods/carbon composite catalyst (Super P + gamma-MnOOH). It is demonstrated that gamma-MnOOH nanorods display higher electrocatalytic performance for O-2 reduction in ionic-liquid based electrolyte, compared with that of Super P and alpha-MnO2 nanorods. The Li-O-2 battery using gamma-MnOOH nanorods/carbon composite as catalyst displays a high discharge capacity of 9400 mAh/g at a low current density of 50 mA/g and can be stably cycled 100 times with a current density of 200 mA/g. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：26 / 29
页数：4
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