Alkaline primary battery including nickel oxyhydroxide

Details Alkaline primary battery including nickel oxyhydroxide Alkaline primary battery including nickel oxyhydroxide

H - Electricity

01

M

H01M 4/52 (2010.01) H01M 4/06 (2006.01) H01M 6/00 (2006.01)

Patent

CA 2534669

An alkaline battery containing spherical oxyhydroxide nickel of crystal having .beta.-type structure as a positive electrode active substance. In the powder X-ray diffraction profile having the Cu of oxyhydroxide nickel as a target, half peak width W of diffraction peak P by (001) face is 0.6~ or less. The ratio H/W of the height H of peak P to the half peak width W is 10000 or above. Mean valence number of nickel contained in the spherical oxyhydroxide nickel is 2.95 or above. When such oxyhydroxide nickel is employed, an alkaline battery exhibiting excellent heavy load discharge characteristics and having an enhanced energy density can be attained.

La présente invention concerne accumulateur alcalin contenant du nickel oxyhydroxyde sphérique de cristaux possédant une structure de type bêta comme substance active d'électrode positive. Dans le profil de diffraction de rayons X sur poudre possédant comme cible le cuivre de nickel oxyhydroxyde, la demi largeur de crête W de crête de diffraction P par face (001) est de 0,6 au maximum. Le rapport H/W de la hauteur H de la crête sur la demi largeur de crête W est supérieur ou égal à 10000. Le nombre de valence moyen du nickel contenu dans le nickel oxyhydroxyde sphérique est de 2,95 au minimum. Lorsque ce nickel oxyhydroxyde est utilisé, on peut obtenir un accumulateur alcalin présentant d'excellentes caractéristiques de forte décharge et possédant une densité d'énergie renforcée.

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