Effect of Cobalt Phthalocyanine on Floating-Charge Performance of Nickel-Metal Hydride Battery
来源期刊：JOURNAL OF RARE EARTHS2004年第5期
论文作者：王国庆 王芳 吴锋 陈实
Key words：Ni-MH batteries; electrochemical catalyst; cobalt phthalocyanine; floating-charge; inner pressure; rare earths;
Abstract: In Ni-MH battery,oxygen evolution causes a high inner pressure during charge and overdischarge,and an inappropriate eliminating way of the oxygen in the battery results in accumulation of heat.This is the main obstacle to develop and apply high capability and high power battery.In this paper,effect of cobalt phthalocyanine(CoPc) on the floating-charge performance of Ni-MH batteries are examined.Experimental results show that the battery with CoPc additive by appropriate adding way displayed a better capability of floating charge and discharge than the one without CoPc.The battery with CoPc added into electrolyte shows the best charging efficiency and cycleability and the slowest increasing speed of inner pressure after 2000th charge and discharge.
王国庆1，王芳1，吴锋1，陈实1
(1.School of Chemical Engineering and Environmental Science,Beijing Institute of Technology;
2.National Development Center of Hi-Tech Green Materials,Beijing 100081,China)
Abstract:In Ni-MH battery,oxygen evolution causes a high inner pressure during charge and overdischarge,and an inappropriate eliminating way of the oxygen in the battery results in accumulation of heat.This is the main obstacle to develop and apply high capability and high power battery.In this paper,effect of cobalt phthalocyanine(CoPc) on the floating-charge performance of Ni-MH batteries are examined.Experimental results show that the battery with CoPc additive by appropriate adding way displayed a better capability of floating charge and discharge than the one without CoPc.The battery with CoPc added into electrolyte shows the best charging efficiency and cycleability and the slowest increasing speed of inner pressure after 2000th charge and discharge.
Key words:Ni-MH batteries; electrochemical catalyst; cobalt phthalocyanine; floating-charge; inner pressure; rare earths;
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