Gastight, sealed alkaline storage battery in the form of a butto

Details Gastight, sealed alkaline storage battery in the form of a butto Gastight, sealed alkaline storage battery in the form of a butto

1995-07-25

1998-09-01

Willis, Jr., Prince

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

429206, 296231, H01M 432, H01M 430

Patent

active

058009477

ABSTRACT:
A Ni/Cd or Ni/hydride storage battery of the button cell type has a positive electrode tablet based on a nickel hydroxide powder having an active mass comprised of spherical particles with a high pycnometric density (d>3.5 g/cm.sup.3). In contrast to conventional nickel hydroxide powders having irregular particles, a better space utilization is achieved during dry pressing due to a narrow particle-size distribution having a maximum in a range of from 5 to 20 .mu.m, and due to the rounded particle surfaces. The specific volumetric capacity of the resulting button cell electrode is consequently approximately 25% higher than that of a conventional positive button cell electrode. A microporous separator having pore sizes smaller than the mean diameter of the spherical particles prevents the danger of short circuits.

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Zuttel, et al., Effect of Partial Substitution of Nickel in AB.sub.2 -Type Zr-Ni Alloys by V, Cr and Mn on the Surface- and Bulk-Properties in View of Battery Applications, "International Journal of Research in Physical Chemistry and Chemical Physics", vol. 183, pp. 1395 et seq. (1994) (no month).
Sakai, et al., Hydrogen Storage Alloys for Nickel-Metal Hydride Battery, "International Journal of Research in Physical Chemistry and Chemical Physics", vol. 183, p. 1372 et seq. (1994) (no month).

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