【作者】 王芳； 邱新平； 吴锋； 陈实； 李丽； 陈立泉；

【Author】 Fang Wang, Xin-pin Qiu, FengWu, Shi Chen, Li Li, Li-quan Chen ( Department of Chemistry, Tsinghua University, Beijing 100084; National Development Center of Hi-Tech Green Materials; School of Chemical Engineering and Environment, Beijing Institute of Technology ,Beijing, 100081)

【机构】 清华大学化学系； 国家高技术绿色材料发展中心；

【摘要】 <正>Ni/MH, as a sealed rechargeable battery, the basic principle of the design is the realization of the so-called "oxygen cycle" during the overcharge stage . However, the hydrogen and oxygen evolution in both the negative and positive electrodes increases the inner pressure of sealed battery, leading to drying of the electrolyte solution and increasing of inner resistance due to gas release from the safety valve. Thus it is necessary to control the inner pressure of the Ni/MH battery during charge and overcharge. Guo-rong He used ring-metalated porphyrin as electrochemical catalyzer and doped one of them on the hydrogen storage alloy electrode of Ni/MH battery to quicken the oxygen gas consumption reaction and lower the inner pressure of battery. Additionally, the author found that Cobalt porphyrin was the best. But as ring-metalated porphrin is costly, electrochemical catalyst with low cost and high performance is in need.更多还原