Aqueous nickel hydroxide paste of high flowability

Details Aqueous nickel hydroxide paste of high flowability Aqueous nickel hydroxide paste of high flowability

1989-05-26

1990-07-10

Miller, Edward A.

Compositions

Compositions containing a single chemical reactant or plural...

2523131, 429223, H01M 432

Patent

active

049405535

ABSTRACT:
An aqueous nickel-hydroxide paste of high flowability for the vibration filling of foam-structure and fiber-structure electrode plaques has a content of about 30 to 50% by volume of nickel hydroxide, a maximum particle size of about 0.04 mm, a plastic viscosity of about 0.1 to 1 Pa.s and a yield value of between about 10 and 120 Pa, a pH of between about 9 and 12 and a content of about 0.5 to 5, in particular about 1 to 5, % by weight, based on the nickel hydroxide content, of a dispersant from the group comprising the water-soluble salts of polhphosphoric acids or di- and polyphosphonic acids and their derivatives. Very particularly suitable as a dispersant is 1-hydroxyethane-1, 1-diphosphonic acid in the form of its cobalt/alkali salt complex. This paste makes it possible to completely fill foam-structure and fiber-structure electrode plaques in one operation.

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Hawley, The Condensed Chemical Dictionary, 9th Ed., p. 703, Van Nostrand Reinhold Co., (1977), New York, <QD5C5; definition of "Polyphos">.

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