H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 4/06 (2006.01) H01M 4/62 (2006.01) H01M 4/52 (2006.01)
Patent
CA 2564422
An alkaline battery includes a positive electrode mixture, a negative electrode, and a separator interposed between the positive electrode mixture and the negative electrode. The positive electrode mixture contains a nickel oxyhydroxide, manganese dioxide and a conductive agent. (1) The nickel oxyhydroxide includes at least manganese dissolved therein, and the manganese accounts for 0.5 to 10 % by mole of the total amount of metal elements contained in the nickel oxyhydroxide. (2) The nickel oxyhydroxide mainly has a .beta.-type crystal structure. (3) The nickel oxyhydroxide has a volume-basis mean particle size of 8 to 15 µm. The use of this positive electrode mixture makes it possible to heighten the capacity of the alkaline battery and improve its storage characteristics. Also, the above-mentioned properties of the nickel oxyhydroxide including manganese enable a significant improvement in the productivity of the nickel oxyhydroxide.
L~invention concerne une pile alcaline comprenant un mélange d~électrode positive et une électrode négative et, interposé entre ceux-ci, un séparateur, le mélange d~électrode positive contenant de l~oxyhydroxyde de nickel, du dioxyde de manganèse et un auxiliaire de conduction, où (1) au moins du manganèse est dissout en solide dans l~oxyhydroxyde de nickel, le manganèse occupant de 0,5 à 10 % molaire de la somme d~éléments métalliques contenus dans l~oxyhydroxyde de nickel, et où (2) l~oxyhydroxyde de nickel est composé principalement d~une structure .beta.-cristalline, et où (3) l~oxyhydroxyde de nickel a un diamètre particulaire moyen en volume de 8 à 15 µm. Grâce à l~utilisation du mélange d~électrode positive ci-dessus, on peut augmenter la capacité et renforcer les caractéristiques de stockage pour la pile alcaline. En outre, en conférant à l~oxyhydroxyde de nickel dans lequel le manganèse solide est dissout les propriétés ci-dessus, on peut nettement améliorer la productivité de l~oxyhydroxyde de nickel.
Kato Fumio
Mukai Yasuo
Noya Shigeto
Okada Tadaya
Sawada Katsuya
Borden Ladner Gervais Llp
Matsushita Electric Industrial Co. Ltd.
Panasonic Corporation
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