Issue 22, 2012
From the journal:

RSC Advances

Fe2O3 nanocluster-decorated graphene as O2electrode for high energy Li–O2 batteries†

Wenyu Zhang,ab   Yi Zeng,a   Chen Xu,ab   Huiteng Tan,ab   Weiling Liu,a   Jixin Zhu,a   Ni Xiao,a   Huey Hoon Hng,a   Jan Ma,a   Harry E. Hoster,b   Rachid Yazamiab  and  Qingyu Yan*abc  

* Corresponding authors

a School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
E-mail: alexyan@ntu.edu.sg
Fax: +65 6790 9081
Tel: +65 6790 4583

b TUM CREATE Research Centre@NTU, Nanyang Technological University, Singapore, Singapore

c Energy Research Institute@NTU, Nanyang Technological University, Singapore, Singapore

Abstract

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 O2 electrodes for Li–O2 batteries, which exhibited enhanced discharge capacities as compared to that of a pure graphene based O2 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 O2 electrode is ascribed to the combination of the fast kinetics of electron transport provided by the graphene sheets and the high electrocatalytic activity for O2 reduction provided by the Fe2O3.

Graphical abstract: Fe2O3 nanocluster-decorated graphene as O2 electrode for high energy Li–O2 batteries

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Article information

DOI
https://doi.org/10.1039/C2RA20757E
Article type
Paper
Submitted
23 Apr 2012
Accepted
19 Jul 2012
First published
26 Jul 2012

RSC Adv., 2012,2, 8508-8514

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

W. Zhang, Y. Zeng, C. Xu, H. Tan, W. Liu, J. Zhu, N. Xiao, H. H. Hng, J. Ma, H. E. Hoster, R. Yazami and Q. Yan, RSC Adv., 2012, 2, 8508 DOI: 10.1039/C2RA20757E

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