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

Jiaohui Zhang, Jian Xie, Chunyang Wu, Gaoshao Cao and Xinbing Zhao Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

摘 要：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 Fe2O3 precursor. The sample after 80 min CVD reaction showed the best electrochemical performance, indicating a promising application in high-power Li-ion batteries.

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