Nickel/metal hydride storage battery

Details Nickel/metal hydride storage battery Nickel/metal hydride storage battery

1998-04-10

2000-06-13

Mai, Ngoclan

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

429224, H01M 432

Patent

active

060747854

ABSTRACT:
The present invention provides a nickel/metal hydride storage battery using improved nickel hydroxide with an increased energy density as the active material. This invention is characterized in that the nickel hydroxide as the active material of the positive electrode constituting the battery indispensably contains as a solid solution at least one transition metal selected from the group consisting of Mn, Cr and Co in a proportion of 2 to 20 atomic % based on the amount of the nickel hydroxide in terms of metallic nickel, and that the crystal structure of the nickel hydroxide at charged state is a hexagonal or tetragonal system which has a diffraction peak of 2.theta. on (00l) plane of .beta.-NiOOH at an angle of approximately 15.degree. to 19.degree. in X-ray diffraction using CuK.alpha. as a source and has a regular array with a NaCl type structure.

REFERENCES:
patent: 4251603 (1981-02-01), Matsumoto et al.
patent: 5348822 (1994-09-01), Ovshinsky et al.
patent: 5366831 (1994-11-01), Watada et al.
patent: 5707764 (1998-01-01), Miyamoto et al.
patent: 5773169 (1998-06-01), Matsuda et al.

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