Self-Assembled Fe2O3/Graphene Aerogel with High Lithium Storage Performance

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• 作者：Li Xiao ; Dongqing Wu ; Sheng Han ; Yanshan Huang ; Shuang Li ; Mingzhong He ; Fan Zhang ; Xinliang Feng
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2013
• 出版时间：May 8, 2013
• 年：2013
• 卷：5
• 期：9
• 页码：3764-3769
• 全文大小：422K
• 年卷期：v.5,no.9(May 8, 2013)
• ISSN：1944-8252

文摘

In this study, graphene aerogel (GA)-supported Fe₂O₃ particles with three-dimensional (3D) architecture was prepared by a one-pot hydrothermal process. Fe₂O₃ particles were dispersed uniformly on the graphene sheets, and the resulting composites self-assembled into a 3D network via hydrothermal treatment. This strategy provides a facile and environmentally friendly method for the large-scale synthesis of Fe₂O₃/GAs without any additional reductant. As the anode material for lithium ion batteries, the Fe₂O₃/GAs in this study manifested an excellent reversible capacity of 995 mA h g^鈥? after 50 cycles at a charge鈥揹ischarge rate of 100 mA g^鈥? and even delivered reversible capacity as high as 372 mA h g^鈥? at a high rate of 5000 mA g^鈥?. The outstanding electrochemical performance of Fe₂O₃/GAs can be attributed to the synergistic interaction between uniformly dispersed Fe₂O₃ particles and graphene aerogel, in which a robust 3D framework of graphene provided highly conductive networks with a large surface area and short diffusion path length for the transport of lithium ions.

Keywords:

Fe₂O₃/GAs; 3D interconnected graphene; self-assembly; anode material; lithium-ion batteries