A porous C/LiFePO₄/multiwalled carbon nanotubes cathode material for Lithium ion batteries

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• 作者：Guohui Qin ; Qianqian Ma ; Chengyang Wang
• 关键词：Lithium iron phosphate Cathode material Hierarchical porous structure Lithium ion batteries
• 刊名：Electrochimica Acta
• 出版年：1 January, 2014
• 年：2014
• 卷：115
• 期：Complete
• 页码：407-415
• 全文大小：2746 K

文摘

Three dimensional (3D) porous C/LiFePO₄/MWCNTs was synthesized by a hybrid of in situ sol gel strategy and a facile electro-polymerization polyaniline technique and a simultaneous sintering progress. In combined with the 3D hierarchical pore topologies and high electronic conduction facilitating the kinetics of both electron transport and lithium ion diffusion within the particles, the optimized electrodes exhibit an ultrahigh rate capacity, stable charge/discharge cycle ability, and a comparative volume capacity. The synthesized LiFePO₄ composite offers a discharge capacity of 169.6mAhg^鈭? (nearly to its the theoretical capability 170mAhg^鈭?) at the C/10 rate and delivers a good rate performance with a capacity of 141.9mAh g^鈭? at a high rate of 20 C, and stable charge/discharge cycle ability (>95% capacity retention after 200 charge/discharge cycles).This non-organic facile synthesize avenue can be high desirable to prepare high-power electrode materials