Journal
RSC ADVANCES
Volume 2, Issue 22, Pages 8508-8514Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ra20757e
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Funding
- Singapore National Research Foundation under CREATE program: EMobility, A*STAR SERC grant [1021700144]
- [NRF2009EWT-CERP001-026]
- [MPA 23/04.15.03 RDP 009/10/102]
- [MPA 23/04.15.03 RDP 020/10/113]
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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.
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