An investigation of the electrochemical performance of polyaniline coated LiFePO4 materials

作者：Lei, Gangtie^*; Yi, Xiaohua; Wang, Lei; Li, Zhaohui; Zhou, Ji

来源：Polymers for Advanced Technologies, 2009, 20(6): 576-580.

DOI：10.1002/pat.1386

• LiFePO4
• polyaniline
• in situ polymerization

A series of polyaniline-LiFePO4 (PAn-LiFePO4) composites were synthesized by in situ polymerization. The samples were characterized by thermogravimetry (TG) and scanning electron microscope (SEM). Electrochemical impedance measurements showed that the polyaniline significantly decreased the charge-transfer resistance of LiFePO4 electrodes. Charge-discharge properties of composites as cathode materials for lithium-ion batteries were studied. The results indicated that PAn-LiFePO4 composites had higher discharge capacity and better cycling property. The PAn-LiFeP04 composite with 25 wt% polyaniline showed the best electrochemical performance. Its first specific discharge capacity was 140.3 mAh/g at 0.1 C and its specific discharge capacity was 118.7 mAh/g after 50 cycles at 1 C.

• 出版日期2009-6
• 单位湘潭大学