Nitrogen-doped graphene nanosheets as cathode materials with excellent electrocatalytic activity for high capacity lithium-oxygen batteries

被引：235
作者：
Li, Yongliang [1 ]
Wang, Jiajun [1 ]
Li, Xifei [1 ]
Geng, Dongsheng [1 ]
Banis, Mohammad N. [1 ]
Li, Ruying [1 ]
Sun, Xueliang [1 ]
机构：
[1] Univ Western Ontario, Dept Mech & Mat Engn, London, ON N6A 5B9, Canada
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2012年 / 18卷
基金：
加拿大创新基金会; 加拿大自然科学与工程研究理事会;
关键词：
Lithium batteries; Energy conversion; Graphene; Nitrogen-doped graphene; Oxygen reduction; CARBON NANOTUBES; AIR; ELECTRODES;
D O I：
10.1016/j.elecom.2012.01.023
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Nonaqueous lithium-oxygen battery with nitrogen-doped graphene nanosheets (N-GNSs) as cathode materials delivered a discharge capacity of 11660 mAh g(-1), which is about 40% higher than that with the pristine graphene nanosheets (GNSs). The electrocatalytic activity of N-GNSs for oxygen reduction in the nonaqueous electrolyte is 2.5 times as that of GNSs. The excellent electrochemical performance of N-GNSs is attributed to the defects and functional groups as active sites introduced by nitrogen doping. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：12 / 15
页数：4
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