Synthesis, electrochemical properties, and characterization of LiFePO4/C composite by a two-source method

JOURNAL OF ALLOYS AND COMPOUNDS

卷:487

Article

Drozd, V.^1,3  Liu, G. Q.¹  Liu, R. S.¹  Kuo, H. T.¹  Shen, C. H.²  Shy, D. S.²  Xing, X. K.² 

[1] Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan

[2] SYNergy ScienTech Corp, Hsinchu 300, Taiwan

[3] Florida Int Univ, Ctr Study Matter Extreme Condit, University Pk, FL USA

关键词: Lithium-ion batteries;    Cathode material;    LiFePO4;   

DOI  :  10.1016/j.jallcom.2009.07.116

来源: Elsevier

【 摘 要 】

LiFePO4/C composites were synthesized by a solid state reaction method utilizing two-component mixture of FeC2O4 center dot 2H(2)O and LiH2PO4. Sintering the reactants with C12H22O11 at different temperatures above 650 degrees C yields a product containing Fe2P as a secondary phase to olivine LiFePO4. The LiFePO4/Fe2P/C composite synthesized at 750 degrees C exhibits an excellent electrochemical performance, i.e. a discharge capacity of 152 mAh/g with a smooth plateau of 3.37 V and a good cycle performance at 0.2C charge/discharge current rate. Other detection techniques, such as X-ray absorption near edge structure (XANES) and scanning electron microscopy (SEM), were also carried out to characterize the sample. (C) 2009 Elsevier B.V. All rights reserved.

【 授权许可】

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