アルカリ蓄電池 - Sanyo Electric Co., Ltd.

Title:

アルカリ蓄電池

Document Type and Number:

Japanese Patent JP5196805

Kind Code:

B2

Abstract:

To provide an alkaline storage battery having excellent discharge characteristics and life characteristics although its negative electrode contains a rare eath-Mg-Ni based hydrogen storage alloy.

The negative electrode 4 of this alkaline storage battery contains a conductive substrate 20 having a plurality of holes 20a, and hydrogen storage alloy particles 20 formed by applying paste containing material powder of the hydrogen storage alloy to the conductive substrate 20 and applying a rolling treatment to it after drying it and allowed to be retained in the substrate. The arithmetic average roughness Ra of the conductive substrate 20 after the rolling treatment is 3.0 μm or more, and the composition of the hydrogen storage alloy particle 22 is expressed by a general formula: ((PrND)αLn1-α)1-βMgβNiγ-δ-εALδTε. The average particle diameter D50 of the material powder of the hydrogen storage alloy is within a range of not less than 6 μm and not more than 40 μm, and the coefficient of variation σ/D50 obtained by dividing standard deviation σ in the particle size distribution of the material powder of the hydrogen storage alloy by the average particle diameter D50 is not more than 1.5.

Inventors:

Kendai Endo
Akira Saguchi
Kihara Masaru

Application Number:

JP2007043909A

Publication Date:

May 15, 2013

Filing Date:

February 23, 2007

Export Citation:

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Assignee:

Sanyo Electric Co., Ltd.

International Classes:

H01M4/24; C22C19/00; H01M4/26; H01M4/38; H01M4/70

Domestic Patent References:

JP2006228536A
JP2006236692A
JP9245782A
JP2006338887A
JP2006156005A
JP2006309998A
JP2004221057A

Attorney, Agent or Firm:

Koji Nagato
Junichi Yamanaka

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