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Hydrogen storage alloy electrode and alkaline storage battery using the same

A hydrogen storage alloy and electrode technology, applied in the direction of alkaline storage battery, alkaline storage battery electrode, nickel storage battery, etc., can solve the problems of hindering hydrogen diffusion, unable to exert high output performance, etc., and achieve the effect of reducing diffusion impedance

Active Publication Date: 2009-03-04
SANYO ELECTRIC CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

As a result, the crystal structure of the surface layer of the hydrogen-absorbing alloy is changed, hindering the diffusion of hydrogen, and it becomes impossible to exhibit sufficient high-output performance.

Method used

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  • Hydrogen storage alloy electrode and alkaline storage battery using the same
  • Hydrogen storage alloy electrode and alkaline storage battery using the same
  • Hydrogen storage alloy electrode and alkaline storage battery using the same

Examples

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Embodiment Construction

[0019] Next, based on figure 1 Embodiments of the present invention will be described in detail, but the present invention is not limited thereto, and appropriate changes can be made within a range that does not change the gist. and also, figure 1 It is a sectional view schematically showing the alkaline storage battery of the present invention.

[0020] 1. Hydrogen storage alloy

[0021] After mixing La, Ce, Pr, Nd, Mg, Ni, Al, Co, Mn, Zn and other metal elements in a specified molar ratio, put these mixtures into a high-frequency induction furnace with an argon atmosphere for dissolution, and then dissolve the solution Quenched into alloy ingots to make hydrogen storage alloys a~e. At this time, by the composition formula La 0.8 Ce 0.1 PR 0.05 Nd 0.05 Ni 4.2 al 0.3 (Co, Mn) 0.5 The indicated alloy is referred to as hydrogen storage alloy a.

[0022] Similarly, with the composition formula La 0.2 PR 0.3 Nd 0.3 Mg 0.2 Ni 3.1 al 0.2 Alloys indicated as hydrogen...

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Abstract

A hydrogen storage alloy used in a hydrogen storage alloy electrode 11 has a crystalline structure having a mixed phase made up of at least an A2B7 type structure and an A5B19 type structure, and a surface layer of hydrogen storage alloy particles is so formed as to have a nickel content ratio greater than that of a bulk. The ratio (X / Y) of the nickel content ratio X (% by mass) of the surface layer to the nickel content ratio Y (% by mass) of the bulk is greater than 1.0 but no more than 1.2 (1.0 H01M 4 / 38 H01M 4 / 24 H01M 10 / 24 1 9 1 2008 / 8 / 18 101378123 2009 / 3 / 4 000000000 Sanyo Electric Co. Japan Yoshida Shuhei Tamura Kazuaki Katayama Yoshinobu Nagae Teruhito Takee Masao li guiliang 11021 The Patent Agency of the Chinese Academy of Sciences Inside the Chinese Academy of Sciences, No.52 Sanlihe Road, Fuwai, Beijing 100864 Japan 2007 / 8 / 29 2007-222307

Description

technical field [0001] The present invention relates to an alkaline storage battery suitable for applications requiring large current discharge, such as hybrid electric vehicles (HEV: Hybrid Electric Vehicle) and electric vehicles (PEV: Pure Electric Vehicle), and particularly relates to hydrogen storage alloys used in alkaline storage batteries for such applications electrode, and an alkaline storage battery using the hydrogen storage alloy electrode. Background technique [0002] In recent years, nickel-hydrogen storage batteries in particular have been used as alkaline storage batteries for power sources of devices requiring high output, such as hybrid electric vehicles (HEV) and electric vehicles (PEV). It is generally known that the hydrogen storage alloy used for the negative electrode active material of the nickel-hydrogen storage battery is replaced by elements such as aluminum (Al) and manganese (Mn). 5 Waiting for AB 5 Part of the type rare earth hydrogen storage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/24H01M10/24C22C19/00H01M10/30
CPCH01M4/366H01M4/383Y02E60/124H01M10/345Y02E60/10H01M4/24H01M10/24
Inventor 吉田周平田村和明片山吉宣长江辉人武江正夫
Owner SANYO ELECTRIC CO LTD