The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 17, 2006
Filed:
Jun. 09, 2003
Kenta Yamamoto, Fukushima, JP;
Osamu Takahashi, Miyagi, JP;
Kazuo Honda, Fukushima, JP;
Kuniyasu Oya, Fukushima, JP;
Kenta Yamamoto, Fukushima, JP;
Osamu Takahashi, Miyagi, JP;
Kazuo Honda, Fukushima, JP;
Kuniyasu Oya, Fukushima, JP;
Sony Corporation, Tokyo, JP;
Abstract
The present invention provides a nickel-zinc battery of an inside-out structure, that is, a battery comprising a positive electrode containing beta-type nickel oxyhydroxide and a negative electrode containing zinc and having a similar structure to an alkali manganese battery, in which the beta-type nickel oxyhydroxide consists of substantially spherical particles, mean particle size of which is within a range from 19 μm to a maximum of 40 μm, the bulk density of which is within a range from 1.6 g/cmto a maximum of 2.2 g/cm, tap density of which is within a range from 2.2 g/cmto a maximum of 2.7 g/cm, specific surface area which based on BET method is within a range from 3 m/g to a maximum of 50 m/g, and the positive electrode of the nickel zinc battery contains graphite powder, where the weight ratio of graphite powder against a total weight of the positive electrode is defined within a range from 4% to a maximum of 8%.