Chinese Journal of Applied Chemistry

Chinese Journal of Applied Chemistry ›› 1997, Vol. 0 ›› Issue (4): 29-32.

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The Sealed Formation and Performances of MH-Ni Batteries

Chen Weixiang1, Tang Zhiyuan2, Liu Zhaolin2, Guo Hetong2, Chen Changpin1   

  1. 1. Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027;
    2. Department of Applied Chemistry, Tianjin University, Tianjin
  • Received:1996-12-31 Revised:1997-05-05 Published:1997-08-10 Online:1997-08-10

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Abstract: The performances such as the discharge capacity, activation, electrocatalytic activity and high-rate dischargeability of MH electrodes were improved by the chemical reduction in an alkaline solution containing a reductant KBH4. MH-Ni batteries assembled with KBH4-treated MH electrodes as negative electrodes were sealed formated. The performances of the batteries by sealed formation were superior to that of the batteries by open formation. The capacity approached 1150.mAh. High rate dischargeability (at 5 C) was above 80% and the capacity at -18℃ (0.2 C) was 90% of that at room tempearture (0.2 C). The cyclic life of the MH-Ni battery at 1 C (100% DOD) increased from 100.cycles to 200.cycles and more.

Key words: metal hydride electrode, chemical reduction, MH-Ni battery, formation, performance

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