ALKALINE PRIMARY BATTERY

摘要

An alkaline primary cell which is improved in reduction of self-discharge and cell capacity under storage at a high temperature, has a prolonged life and makes use of nickel oxyhydroxide is provided inexpensively. beta -Form nickel oxyhydroxide is contained in a positive electrode mixture as an active material, which contains cobalt and zinc as a substitutional element for solid solution, and has a total amount X + Y of molar ratios of cobalt atom X and zinc atom Y such that 2≤X + Y≤16, with a mixing ratio satisfying the relationship of Y≤3/2x X + 1/2 and Y≥2/3 x X - 1/3, and where a diffraction peak obtained as a result of measurement of X-ray powder diffraction of nickel oxyhydroxide appears only in the vicinity of 18.5 DEG within a range of 2θ= 10 DEG - 30 DEG . This positive electrode mixture is formed as a molding (2) of a hollow cylinder and inserted into a positive electrode can (4), and a negative electrode active material (8) is placed at the central portion thereof with a separator put between it and the molding, to constitute an inside out type cell.