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Title:
HYDROGEN STORAGE ALLOY POWDER AND NICKEL HYDROGEN SECONDARY BATTERY USING THIS HYDROGEN STORAGE ALLOY POWDER
Document Type and Number:
WIPO Patent Application WO/2016/143519
Kind Code:
A1
Abstract:
This nickel hydrogen secondary battery 2 is provided with: an outer casing can 10; and an electrode group 22 that is contained within the outer casing can 10 together with an alkaline electrolyte solution in a hermetically sealed state. The electrode group 22 is composed of a positive electrode 24 and a negative electrode 26, which are superposed on each other with a separator 28 being interposed therebetween. The negative electrode 26 contains a hydrogen storage alloy powder that is an aggregate of hydrogen storage alloy particles. If M is the average particle diameter of the hydrogen storage alloy particles, P is the particle diameter equal to 1/2 of M, and Q is the particle diameter equal to 1/3 of M, the content of the particles having particle diameters of P or less is less than 20% by mass of the whole hydrogen storage alloy powder, and the content of the particles having particle diameters of Q or less is less than 10% by mass of the whole hydrogen storage alloy powder.

Inventors:
KIHARA MASARU (JP)
SAGUCHI AKIRA (JP)
SHINGAI YUSUKE (JP)
ISHIDA JUN (JP)
KAI TAKUYA (JP)
KAJIWARA TAKESHI (JP)
Application Number:
PCT/JP2016/055451
Publication Date:
September 15, 2016
Filing Date:
February 24, 2016
Export Citation:
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Assignee:
FDK CORP (JP)
International Classes:
H01M4/38; B22F1/00; B22F5/00; C22C19/00; H01M4/24; H01M10/30
Domestic Patent References:
WO2014118846A12014-08-07
Foreign References:
JPH0837004A1996-02-06
JP2014089879A2014-05-15
JP2014026844A2014-02-06
JP2000277096A2000-10-06
Other References:
See also references of EP 3270444A4
Attorney, Agent or Firm:
OGAWA, EIJI (JP)
Eiji Ogawa (JP)
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