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Hydrogen storage alloy

An alloy and general technology, applied in the field of hydrogen occlusion alloys, can solve the problems of increased hydrogen occlusion or release, and achieve the effects of high capacitance and more hydrogen occlusion

Inactive Publication Date: 2007-04-25
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, the high capacitance of hydrogen storage alloys has always meant increasing the amount of hydrogen storage or release per unit mass

Method used

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  • Hydrogen storage alloy

Examples

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Effect test

Embodiment

[0059] According to the compositions shown in Table 1, the metal raw materials were weighed and mixed, and the mixture was melted in a high-frequency melting furnace to obtain billets of Examples 1-7 and Comparative Examples 1-3. These ingots were heated under an argon atmosphere at a temperature of 1000°C for 10 hours to form the crystal structure in the ingots as AB 5 Type and AB 2 type of superlattice structure. Then, a test piece of a predetermined size was produced from the blank, and the true density of the test piece was measured. Table 1 shows the results and the concentration of Al in the alloy. In addition, each hydrogen storage alloy of the example and the comparative example contains two or more kinds selected from La, Ca, and Y as Ln, and Table 1 also shows the mass ratio of these elements in Ln.

[0060] Table 1

[0061]

composition

Ln

La's

mass ratio

example(%)

Ln

The quality of Ca

...

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Abstract

A hydrogen storage alloy has a composition expressed by a general formula: Ln1-alphaMgalpha(Ni1-betaTbeta)gamma. In the formula, Ln is at least one element selected from a group consisting of La, Ce, etc.; T is at least one element selected from a group consisting of V, Nb, etc.; subscripts alpha, beta and gamma are numeric values that satisfy 0.05 H01M 4 / 38 H01M 4 / 24 C22C 30 / 00 1 8 1 2006 / 9 / 20 1953251 2007 / 4 / 25 000000000 Sanyo Electric Co. Japan Kihara Masaru Endo Takahiro Aizawa Tatsuya lixiang lan 11021 The Patent Agency of the Chinese Academy of Sciences Inside the Chinese Academy of Sciences, No.52 Sanlihe Road, Fuwai, Beijing 100864 Japan 2005 / 9 / 20 2005-271941

Description

technical field [0001] The present invention relates to hydrogen storage alloys, and more particularly, to hydrogen storage alloys suitable for alkaline storage batteries. Background technique [0002] Alkaline storage batteries using hydrogen storage alloys as negative electrodes are in great demand as consumer batteries because they have high capacity and are cleaner than those using lead and cadmium. [0003] This alkaline battery usually uses LaNi 5 Waiting for AB 5 type (CaCu 5 type) is a hydrogen storage alloy, and its discharge capacitance exceeds 80% of the theoretical capacitance, but there is a limitation in realizing higher capacitance. [0004] Therefore, in order to achieve high capacitance, an alkaline storage battery using a rare earth-Mg-Ni hydrogen storage alloy in which AB is substituted with Mg elements has been developed. 5 The type is obtained by hydrogen occlusion of a part of the rare earth elements in the alloy. For example, Patent Document 1 dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/24C22C30/00C22C19/00
CPCY02E60/124H01M4/383H01M4/242H01M10/286H01M4/381H01M4/38Y02E60/10
Inventor 木原胜远藤贤大会泽达也
Owner SANYO ELECTRIC CO LTD
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