Acta Phys. -Chim. Sin. ›› 1998, Vol. 14 ›› Issue (02): 154-157.doi: 10.3866/PKU.WHXB19980211
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Hong Cun-Mao, Yang Jing-Wu, Yang Yong, Hong Liang
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The AB_5 alloy powders prepared by gas-atomization have many advantages: spherical particles convenient for packing. high press and wear resistance, enhanced corrosion and dispersion resistance. But lack of electrochemical activity is a barrier for use in Ni-MH battery. An activation method have been carried out in our laboratory. The gas-atomized powder was treated by an oxidizer (a solution of copper salt) to form a Cu and Ni-rich layer on the surface of the particles. The activity of the gas-atomized powder was greatly improved. For the treated powder MINi3.8Co0.5Mn0.3Al0.4, it was found that the discharge capacity after 3 cycles of charge-discharge reached an ideal value 240mA.h.g- 1, but only 103 mA•h•g- 1 for the non-treated powder.
Key words: Surface treatment, Metal hydride electrode
Hong Cun-Mao, Yang Jing-Wu, Yang Yong, Hong Liang. Study of Surface Treatment for Gas-atomized AB5 Alloy Powder[J].Acta Phys. -Chim. Sin., 1998, 14(02): 154-157.
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URL: http://www.whxb.pku.edu.cn/EN/10.3866/PKU.WHXB19980211
http://www.whxb.pku.edu.cn/EN/Y1998/V14/I02/154
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