Fe2O3 nanocluster-decorated graphene as O2 electrode for high energy Li-O2 batteries

被引：54

作者：

Zhang, Wenyu ^{[1
,2
]}

Zeng, Yi ^{[1
]}

Xu, Chen ^{[1
,2
]}

Tan, Huiteng ^{[1
,2
]}

Liu, Weiling ^{[1
]}

Zhu, Jixin ^{[1
]}

Xiao, Ni ^{[1
]}

Hng, Huey Hoon ^{[1
]}

Ma, Jan ^{[1
]}

Hoster, Harry E. ^{[2
]}

Yazami, Rachid ^{[1
,2
]}

Yan, Qingyu ^{[1
,2
,3
]}

机构：

[1] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

[2] Nanyang Technol Univ, TUM CREATE Res Ctr NTU, Singapore 637459, Singapore

[3] Nanyang Technol Univ, Energy Res Inst NTU, Singapore 637553, Singapore

来源：

RSC ADVANCES | 2012年 / 2卷 / 22期

基金：

新加坡国家研究基金会;

关键词：

LITHIUM-AIR BATTERY; PERFORMANCE; NANOSHEETS; DISCHARGE; CATALYSTS; CAPACITY; CATHODE; SPHERES; HYBRID; SHEETS;

D O I：

10.1039/c2ra20757e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Fe2O3 nanocluster-decorated graphene (Fe2O3/graphene) hybrids with controlled contents of Fe2O3 were prepared by a facile electrochemical process. These Fe2O3/graphene hybrids were tested as O-2 electrodes for Li-O-2 batteries, which exhibited enhanced discharge capacities as compared to that of a pure graphene based O-2 electrode, e.g. the Fe2O3/graphene electrode with 29.0 wt% of Fe2O3 delivered a discharge capacity of 8290 mA h g(-1) and a round-trip efficiency of 65.9% as compared to 5100 mA h g(-1) and 57.5% for a pure graphene electrode. The excellent electrochemical properties of Fe2O3/graphene as an O-2 electrode is ascribed to the combination of the fast kinetics of electron transport provided by the graphene sheets and the high electrocatalytic activity for O-2 reduction provided by the Fe2O3.

引用

页码：8508 / 8514

页数：7

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