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Citation: Hong Cun-Mao, Yang Jing-Wu, Yang Yong, Hong Liang. Study of Surface Treatment for Gas-atomized AB₅ Alloy Powder[J]. Acta Physico-Chimica Sinica, ;1998, 14(02): 154-157. doi: 10.3866/PKU.WHXB19980211 shu

Study of Surface Treatment for Gas-atomized AB₅ Alloy Powder

1.
Department of Chemistry,Peking University,Beijing 100871

Received Date: 4 May 1997
Available Online: 15 February 1998

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.
- Surface treatment,
- Metal hydride electrode
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Study of Surface Treatment for Gas-atomized AB5 Alloy Powder

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通讯作者: 陈斌, bchen63@163.com

Study of Surface Treatment for Gas-atomized AB₅ Alloy Powder