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Journal of Inorganic Materials

Journal of Inorganic Materials

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Structure and Electrochemical Characters of Nano-sized Ni(OH)2-C Prepared by Precipitation-transformation Method

ZHUANG Xin-Guo1,2; CHENG Jie1; YANG Dong-Ping2; CAO Gao-Ping1; YANG Yu-Sheng1   

  1. 1. Research Institute of Chemical Defense; Beijing 100083; China; 2.Continental Battery Beijing Limited Company; Beijing 100176; China
  • Received:2004-03-05 Revised:2004-05-24 Published:2005-03-20 Online:2005-03-20

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Abstract: Nano-sized Ni(OH)2--C and Ni0.96Co0.04(OH)2--C were synthesized by a precipitation-transformation method. Their physical and electrochemical characteristics, such as crystal configuration, surface
area, granule appearance, special capacity, rate discharge capability, electrochemical action reversibility, proton diffusion rate and electrode kinetics were investigated. Ni(OH)2--C and Ni0.96Co0.04(OH)2--C
have the crystal structure of a single β(Ⅱ) phase. Their electrochemical characteristics mainly depend on their crystal configuration, crystal grain and conductibility. Adding nano carbon black to
Ni(OH)2 can improve its electrochemical performance. Adding spindle-shaped nano-carbon black can more effectively advance Ni(OH)2 (Ni(OH)2--C) electrochemical performance then adding
flake- shaped one. Adding active carbon is futile. Substituting Ni with Co (Ni0.96Co0.04(OH)2 formed) can upgrade nano-Ni(OH)2 rate discharge ability and electrochemical reversibility. Adding both
Co and carbon black can increase Ni(OH)2 discharge capacity.

Key words: hybrid supercapacitor, Ni（OH）2, carbon, doping, nano-sized compound, characteristics

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