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Title:
Alkaline battery
Document Type and Number:
Japanese Patent JP5920334
Kind Code:
B2
Abstract:
The invention provides an alkaline storage battery having excellent assist output properties and high-temperature charging efficiency properties. The alkali storage battery uses a nickel positive electrode for an alkali storage battery wherein an active substance, the primary component of which is nickel hydroxide, is filled in a conductive substrate. The positive electrode active substance contains zinc. A coating layer containing yttrium is formed at the surface of the active substance, or a region of a high yttrium concentration is formed near the surface in the active substance. The amount of zinc contained in the active substance is 0.001 or greater but less than 0.04 by mass ratio per nickel contained in the active substance. When charged to SOC120% at 55ºC and a current of 0.5 It, the difference between the SOC50% voltage and charging peak voltage is 40 mV or greater. Preferably, the amount of yttrium contained in the coating layer or the region of a high yttrium concentration is 7 g/m2 or greater per unit surface area of the positive electrode.

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Inventors:
Ikuyuki Harada
Toshihiro Sakata
Yasuhiro Kudo
Kenji Fujita
Teruhito Nagae
Application Number:
JP2013502300A
Publication Date:
May 18, 2016
Filing Date:
February 27, 2012
Export Citation:
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Assignee:
Sanyo Electric Co., Ltd.
International Classes:
H01M4/32; H01M4/52; H01M4/80
Domestic Patent References:
JPH117950A1999-01-12
JPH08162111A1996-06-21
JPH09180717A1997-07-11
JP2012069510A2012-04-05
JP2001297758A2001-10-26
JP2009087632A2009-04-23
JP2010231949A2010-10-14
JP2006059807A2006-03-02
JP2000133302A2000-05-12
JP2000277100A2000-10-06
JPH06103973A1994-04-15
JPH06103973A1994-04-15
JPH117950A1999-01-12
JPH08162111A1996-06-21
JPH09180717A1997-07-11
JP2012069510A2012-04-05
JP2001297758A2001-10-26
JP2009087632A2009-04-23
JP2010231949A2010-10-14
JP2006059807A2006-03-02
JP2000133302A2000-05-12
JP2000277100A2000-10-06
Attorney, Agent or Firm:
Tokuda Yoshiaki
Koichi Nomura



 
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