Title:
ALKALI BATTERY
Document Type and Number:
Japanese Patent JP2015043285
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an alkali storage battery in which an active material at an edge of a positive electrode is suppressed from falling off even when the edge of the positive electrode is not provided with protective tape and an occurrence ratio of internal shorting (percent defective) is small, and which is of high quality and has high productivity.SOLUTION: A nickel-hydrogen storage battery 10 as an alkali storage battery has: a positive electrode 11 in which a porous nickel sintered substrate is filled with a positive electrode active material composed mainly of nickel hydride; a negative electrode 12; and an electrode group 14 formed by winding a separator 13 around. The nickel density of the porous nickel sintered substrate is 1.10 g/cmto 1.50 g/cminclusive, the density of the positive electrode active material composed mainly of nickel hydride is 1.76 g/cmto 1.97 g/cminclusive, the thickness of the positive electrode 11 is 0.33 mm to 0.36 mm inclusive, and the surfaces of the porous nickel sintered substrate and positive electrode active material are coated with a yttrium compound.
Inventors:
HARADA MOMOKO
Application Number:
JP2013174539A
Publication Date:
March 05, 2015
Filing Date:
August 26, 2013
Export Citation:
Assignee:
SANYO ELECTRIC CO
International Classes:
H01M10/24; H01M2/18; H01M4/32; H01M4/66; H01M4/80; H01M10/28
Attorney, Agent or Firm:
Patent business corporation eye Py WIN