期刊
ACS NANO
卷 5, 期 4, 页码 3333-3338出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn200493r
关键词
reduced graphene oxide; Fe2O3; anode; lithium ion battery; homogeneous coprecipitation
类别
资金
- University of Texas at Austin
- Texas Nanotechnology Research Superiority Initiative (TNRSI)/SWAN
- Department of Energy Office of Science [DEFG02-07ER46377]
- National Science Foundation [CBET-0553649]
- China Scholarship Council
- SRF for ROCS, SEM
Reduced graphene oxide/Fe2O3 composite was prepared using a facile two-step synthesis by homogeneous coprecipitation and subsequent reduction of the G-O with hydrazine under microwave irradiation to yield reduced graphene oxide (RG-O) platelets decorated with Fe2O3 nanoparticles. As an anode material for Li-ion batteries, the RG-O/Fe2O3 composite exhibited discharge and charge capacities of 1693 and 1227 mAh/g, respectively, normalized to the mass of Fe2O3 In the composite (and 1355 and 982 mAh/g, respectively, based on the total mass of the composite), with good cycling performance and rate capability. Characterization shows that the Fe2O3 nanoparticles are uniformly distributed on the surface of the RG-O platelet in the composite. The total specific capacity of RG-O/Fe2O3 is higher than the sum of pure RG-O and nanoparticle Fe2O3, indicating a positive synergistic effect of RG-O and Fe2O3 on the improvement of electrochemical performance. The synthesis approach presents a promising route for a large-scale production of RG-O platelet/metal oxide nanoparticle composites as electrode materials for Li-ion batteries.
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