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锂离子电池LiFePO4／聚并苯复合正极材料的合成与改性研究 被引量：4

Synthesis and electrochemical property of LiFePO_4/polyacenic semiconductor material cathode for lithium-ion battery
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摘要 通过固相法合成了LiFePO4/聚并苯(PAS)复合材料.纯的LiFePO4电导率仅为(0.1～1)×10-9S/cm,合成LiFePO4/PAS复合材料电导率为2.0S/cm,复合材料的电导率提高了10个数量级.LiFePO4/PAS复合材料具有优异的电化学性能,在室温1C倍率下首次放电容量为140mA.h/g,经过200次循环后容量仍保持最初容量的97.14%.说明通过包覆PAS材料极大地提高了LiFePO4的大电流充、放电容量和循环性能. LiFePO4/polyacenic semiconductor material （PAS） composite was synthesized by solid-state method. Conductivity measurements show that the coating of PAS significantly improved the conductivity of LiFePO4 electrode from （0.1- 1 ）× 10^-9 S/cm to 2.0 S/cm. The LiFePO4/PAS electrode can deliver an initial discharge capacity of 140 mA· h/g at the 1C rate, which was measured at room temperature. This electrode shows an excellent cycleability that remained at 97.14 % of the initial capacity after 200 cycles. The PAS coating method was found to be a critical pathway that can be used to improve high rate capacity and cycleability.
作者 张凌云 王荣顺 王淑英
机构地区 东北电力大学化学工程学院 东北师范大学化学学院
出处 《东北师大学报（自然科学版）》 CAS CSCD 北大核心 2008年第1期81-84,共4页 Journal of Northeast Normal University(Natural Science Edition)
基金 吉林省科技发展计划项目(20050415)
关键词 锂离子电池 正极材料 LiFePO4/PAS复合材料 lithium-ion battery cathode LiFePO4/polyacenic semiconductor material
分类号 O646.21 [理学—物理化学]
  • 相关文献

参考文献6

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共引文献3

同被引文献39

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引证文献4

二级引证文献10

东北师大学报（自然科学版）
2008年 第1期

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