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›› 2011, Vol. 11 ›› Issue (3): 529-532.

• 材料工程专栏 • 上一篇    下一篇

非晶态氢氧化镍复合碳纳米管电极材料的电化学性能

刘长久 邢春晓 李培培   

  1. 桂林理工大学化学与生物工程学院 桂林理工大学化学与生物工程学院 桂林理工大学化学与生物工程学院
  • 收稿日期:2011-04-08 修回日期:2011-05-18 出版日期:2011-06-20 发布日期:2011-06-20
  • 通讯作者: 刘长久

Electrochemical Performance of the Amorphous Nickel Hydroxide Electrode Material Compounded with Carbon Nanotubes

LIU Chang-jiu XING Chun-xiao LI Pei-pei   

  1. School of Chemistry and Biology Engineering, Guilin University of Technology School of Chemistry and Biology Engineering, Guilin University of Technology School of Chemistry and Biology Engineering, Guilin University of Technology
  • Received:2011-04-08 Revised:2011-05-18 Online:2011-06-20 Published:2011-06-20
  • Contact: LIU Chang-jiu

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被引次数

7

摘要： 采用快速冷冻化学共沉淀法制备非晶态Ni(OH)2粉体，将其作为电化学活性物质复合碳纳米管合成镍电极材料，研究了其电化学性能. 结果表明，加入碳纳米管有效减少了镍电极的电荷转移电阻，增大了电极反应过程的质子扩散系数. 复合0.5%(w)碳纳米管合成的非晶态氢氧化镍电极材料在1 C充放电制度下，放电终止电压为1.0 V时，其放电比容量高达336.5 mA×h/g，放电中值电压为1.251 V，充放电循环30次，放电比容量保持率为96.74%，表现出较好的高倍率充放电性能.

关键词: 非晶态氢氧化镍, 碳纳米管, 电极材料, 电化学性能

Abstract: Amorphous nickel hydroxide powder as electrochemical active substance was prepared by microemulsion method. The powder was compounded with carbon nanotubes (CNTs) to be nickel electrode material, then its electrochemical properties tested. The results showed that the addition of CNTs not only effectively reduced the charge transfer resistance of nickel electrode, but also increased the proton diffusion coefficient. The sample containing 0.5%(w) CNTs showed good performances at a high charge-discharge rate, it had the specific discharge capacity 336.5 mA×h/g and the discharge middle voltage at 1.251 V at 1 C rate. The discharge capacity retention rate was 96.74% after 30 times cycles.

Key words: amorphous nickel hydroxide, carbon nanotubes, electrode material, electrochemical performance

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