A new route for synthesizing C/LiFePO4/multi-walled carbon nanotube secondary particles for lithium ion batteries

作者：Qin Guohui; Ma Qianqian; Wang Chengyang^*

来源：Solid State Ionics, 2014, 257: 60-66.

DOI：10.1016/j.ssi.2013.11.023

• Lithium iron phosphate
• Nanocomposites energy storage conversion
• Lithium ion batteries

Nanosized C/LiFePO4/MWCNTs secondary particles were synthesized by a combination of hydrothermal progress and a facile electro-polymerization polyaniline process with simultaneous calcinations. In combination with the continuous three-dimensional (3D) networks 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 with a tap density of 1.78 g cm(-3), stable charge/discharge cycle ability. The synthesized LiFePO4 composite demonstrated an increased reversible capacity and better cycling ability compared to the bare LiFePO4, offering a discharge capacity of 169.9 mAh g(-1) (nearly to its the theoretical capability 170 mAh g(-1)) at the C/10 rate and delivering a good rate performance with a capacity of 143.4 mAh g(-1) 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 highly desirable to prepare next-generation high-power lithium ion batteries.

• 出版日期2014-4-1
• 单位天津大学