A porous C/LiFePO4/multiwalled carbon nanotubes cathode material for Lithium ion batteries
A porous C/LiFePO4/multiwalled carbon nanotubes cathode material for Lithium ion batteries
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DOI：
10.1016/j.electacta.2013.10.177
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发表时间：
2014
影响因子：
6.6
通讯作者：
Guohui Qin;Qian-qian Ma;Cheng-yang Wang
中科院分区：
文献类型：
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作者：
Guohui Qin;Qian-qian Ma;Cheng-yang Wang
采用原位凝胶策略和易电聚合聚苯胺技术以及同步烧结工艺合成了三维多孔C/LiFePO4/MWCNTs。结合三维分层孔隙拓扑结构和促进电子传递和锂离子扩散动力学的高电子传导，优化后的电极具有超高倍率容量、稳定的充放电循环能力和相对体积容量。合成的lifepo4复合材料在C/10倍率下的放电容量为169.6mAhg−1（接近其理论容量170mAhg−1），在20℃的高倍率下具有141.9mAh g−1的良好倍率性能，并且具有稳定的充放电循环能力（200次充放电循环后容量保持率为95%）。这种非有机易合成途径是制备高功率电极材料的理想途径
Three dimensional (3D) porous C/LiFePO4/MWCNTs was synthesized by a hybrid ofin situsol 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 LiFePO4composite offers a discharge capacity of 169.6mAhg−1(nearly to its the theoretical capability 170mAhg−1) at the C/10 rate and delivers a good rate performance with a capacity of 141.9mAh g−1at 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