储氢合金电极中添加碳纳米管对SC型高功率电池性能的影响

在SC型高功率镍氢电池的负极中添加不同含量的碳纳米管制备SC型高功率镍氢电池, 并对其容量、大电流放电性能和循环寿命进行研究. 结果发现, 碳纳米管的加入有利于提高电池的综合性能, 尤其是大电流放电性能和循环寿命; 加入碳纳米管的含量为0.8%(w)时电池的综合性能最好, 其最高容量达到3369 mAh, 2C(6000 mA)循环600次后容量仍然保持在3280 mAh(97% DOD(放电深度))以上, 5C(15000 mA)循环180 次容量仍然有2850 mAh(89.1% DOD)以上.

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

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).