Manufacturing method for a hydrogen-storage-alloy powder for bat

Solid material comminution or disintegration – Processes – With application of fluid or lubricant material

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241 21, 241 22, 241 27, 241 29, 241DIG14, B02C 1912, B02C 2318

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active

057756023

ABSTRACT:
A manufacturing method for a hydrogen-storage-alloy powder for batteries, which is a useful material for a negative electrode of a nickel-hydrogen secondary battery whose internal pressure in an overcharged state is low, the method comprising a process for crushing a hydrogen-storage-alloy ingot into a coarse alloy powder in a non-oxidizing atmosphere, and a process for mechanically grinding the coarse alloy powder in contact with an aqueous solution in which any one of salts including a sulfite, hydrogen phosphate, and dihydrogen phosphate is dissolved or with an aqueous alkali solution containing cobalt.

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J.J.G. Willems, Metal Hydride Electrodes Stability of LaNi.sub.5 Related Compounds, Philips Journal of Research, vol. 39, Suppl. No. 1, 1984, Netherlands, Abstract, Table of Contents and p. 1-94.

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