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Fe2O3 nanocluster-decorated graphene as O-2 electrode for high energy Li-O-2 batteries

Research output: Contribution to journalJournal article

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  • Wenyu Zhang
  • Yi Zeng
  • Chen Xu
  • Huiteng Tan
  • Weiling Liu
  • Jixin Zhu
  • Ni Xiao
  • Huey Hoon Hng
  • Jan Ma
  • Harry E. Hoster
  • Rachid Yazami
  • Qingyu Yan
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<mark>Journal publication date</mark>26/07/2012
<mark>Journal</mark>RSC Advances
Issue number22
Volume2
Number of pages7
Pages (from-to)8508-8514
Publication statusPublished
Original languageEnglish

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 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.