In-situ One-pot Preparation of LiFePO4/Carbon-Nanofibers Composites and Their Electrochemical Performance

J Mater Sci Technol ›› 2011, Vol. 27 ›› Issue (11): 1001-1005.

• Novel Processing and Characterization Methods • Previous Articles Next Articles

In-situ One-pot Preparation of LiFePO₄/Carbon-Nanofibers Composites and Their Electrochemical Performance

Jiaohui Zhang, Jian Xie, Chunyang Wu, Gaoshao Cao, Xinbing Zhao

Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

Received:2011-07-22 Revised:2011-08-22 Online:2011-11-30 Published:2011-11-29
Contact: Xinbing Zhao
Supported by:
Zijin Program of Zhejiang University, China, the Fundamental Research Funds for the Central Universities (No. 2010QNA4003), the Ph.D. Programs Foundation of Ministry of Education of China (No. 20100101120024), the Foundation of Education Of-fice of Zhejiang Province (No. Y201016484) and the Qian-jiang Talents Project of Science Technology Department of Zhejiang Province (No. 2011R10021).

Abstract

Abstract: A novel in-situ route was employed to synthesize LiFePO₄/carbon-nanofibers (CNFs) composites. The route combined high-temperature solid phase reaction with chemical vapor deposition (CVD) using Fe₂O₃ and LiH₂PO₄ as the precursors for LiFePO₄ growth and acetylene (C₂H₂) as the carbon source for CNFs growth. The composites were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) specific surface area, field emission scanning electron microscopy (FE-SEM), and transmission electron microscopy (TEM). The electrochemical performance of the composites was studied by galvanostatic cycling and cyclic voltammetry (CV). The results showed that the in-situ CNFs growth could be realized by the catalytic effect of the Fe₂O₃precursor. The sample after 80 min CVD reaction showed the best electrochemical performance, indicating a promising application in high-power Li-ion batteries.

Key words: LiFePO₄/carbon-nanofibers, In-situ catalytic growth, 3D conductive network, Electrochemical performance

Jiaohui Zhang, Jian Xie, Chunyang Wu, Gaoshao Cao, Xinbing Zhao. In-situ One-pot Preparation of LiFePO₄/Carbon-Nanofibers Composites and Their Electrochemical Performance[J]. J Mater Sci Technol, 2011, 27(11): 1001-1005.

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In-situ One-pot Preparation of LiFePO₄/Carbon-Nanofibers Composites and Their Electrochemical Performance

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