Synthesis and evaluation of carbon-coated Fe2O3 loaded on graphene nanosheets as an anode material for high performance lithium ion batteries - Archive ouverte HAL
Article Dans Une Revue The Chemical Engineering Journal Année : 2013

Synthesis and evaluation of carbon-coated Fe2O3 loaded on graphene nanosheets as an anode material for high performance lithium ion batteries

Résumé

A hybrid material of carbon-coated Fe2O3 submicro-particles loaded on graphene nanosheets (Fe2O3@C/GNs) is prepared by a two step route including a hydrothermal and a subsequent glucose impregnation-pyrolysis process. The obtained material is composed of GNs and ∼400 nm size Fe2O3 particles coated by thin carbon layer with a thickness of 5 nm. As an anode material for lithium ion batteries, Fe2O3@C/GNs hybrid shows an improved electrochemical performance in the initial coulombic efficiency (71%), reversible capacity (900 mA h g−1 after 50 cycles at a current of 200 mA g−1) and capacity retention rate (82% after 50 cycles). This result is much better than the synthesized bare Fe2O3 and Fe2O3/GNs electrodes. In addition to the contribution of GNs, the carbon-coated layer around Fe2O3 particles is believed to be a key factor to improve the electrochemical performance of Fe2O3.

Dates et versions

hal-00817520 , version 1 (24-04-2013)

Identifiants

Citer

Gang Wang, Hui Wang, Shaobo Cai, Jintao Bai, Zhaoyu Ren, et al.. Synthesis and evaluation of carbon-coated Fe2O3 loaded on graphene nanosheets as an anode material for high performance lithium ion batteries. The Chemical Engineering Journal, 2013, 239, pp.37-44. ⟨10.1016/j.jpowsour.2013.03.105⟩. ⟨hal-00817520⟩
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