Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (03): 527-532.doi: 10.3866/PKU.WHXB20080331

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Influence of Addition of Carbon Nanotubes in the Hydrogen Storage Alloy Electrode on the Performance of SC High Power Batteries

CHEN Yu-Ting; ZHANG Hai-Yan; ZHANG Guo-Qing; CHEN Yi-Ming; ZHU Qing-Feng   

  1. Faculty of Material and Energy, Guangdong University of Technology, Guanzhou 510006, P. R. China
  • Received:2007-08-15 Revised:2007-11-27 Published:2008-03-10
  • Contact: ZHANG Hai-Yan

Abstract: The carbon nanotubes were added to the cathode to prepare SC high-power Ni/MH batteries. The capacity, large-current discharging performance and cycle life were investigated. It was found that adding carbon nanotubes was greatly advantageous to enhance the batteries’ overall performance, especially the large-rate discharge performance and cycle life. When the weight ratio of the MWNTs in the compound electrode was 0.8%(w), the overall performance of the battery was the best, which showed a highest capacity of 3369 mAh in the condition of 3000 mA charge current and 6000 mA discharge current (2C-rate discharge), and the cycle life surpassed 600 times, the capacities passed 3280 mAh (97% DOD (depth of discharge)). Especially in the condition of 5C-rate large-current discharge (3000 mAh charge current and 15000 mA discharge current), its cycle life surpassed 180 times (89.1% DOD).

Key words: SC high-power Ni/MH batteries, CNTs, Capacity, Cycle life, Large-current discharging performance


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