Panasonic Corporation

Kyoko Nakatsuji

Yoshitaka Dansui

Hideaki Ohyama

Kazutaka Ikeda

Shinichi Orimo

Yuko Nakamori

Hai-Wen Li

Susumu Kikuyama

A negative electrode active material for a nickel-metal hydride battery of the present invention includes a hydrogen storage alloy, the hydrogen storage alloy containing La, Mg, Ni, Co, Al, and element M. The molar ratio y of Ni to the total of La and Mg is 2&#x2266;y&#x2266;3, the molar ratio z of Co to the total of La and Mg is 0.25&#x2266;z&#x2266;0.75, the molar ratio &#x3b1; of Al to the total of La and Mg is 0.01&#x2266;&#x3b1;&#x2266;0.05, and the molar ratio x of Mg to the total of La and Mg is 0.01&#x2266;x&#x2266;0.5. Element M represents at least one selected from the group consisting of Y and Sn, and the content of element M in the hydrogen storage alloy is 0.4 wt % or less.

Negative electrode active material for nickel-metal hydride battery and nickel-metal hydride battery using the same, and method for treating negative electrode active material for nickel-metal hydride battery

A negative electrode material for a nickel-metal hydride battery containing a hydrogen-absorbing alloy represented by a general formula: MmTNiAlMnCoT, in which: Mm is at least one of light rare earth elements; Tis at least one selected from the group consisting of Mg, Ca, Sr and Ba; Tis at least one selected from the group consisting of Sn, Cu and Fe; and 0.015&#x2266;a&#x2266;0.5, 2.5&#x2266;x&#x2266;4.5, 0.05&#x2266;y+z&#x2266;2, 0&#x2266;b&#x2266;0.6, 0&#x2266;c&#x2266;0.6 and 5.6&#x2266;x+y+z+b+c&#x2266;6 are satisfied.

Negative electrode material for nickel-metal hydride battery and treatment method thereof, and nickel-metal hydride battery

An electrode alloy powder includes a hydrogen storage alloy and magnetic material clusters. The hydrogen storage alloy contains 20 to 70 wt % of Ni. The magnetic material clusters contain metal nickel, and have an average cluster size of 8 to 10 nm. A method for producing the electrode alloy powder includes an activation step of allowing a raw material powder including a hydrogen storage alloy to be in contact with an aqueous solution containing A wt % of sodium hydroxide and held at 100&#xb0; C. or greater for B minutes. A and B satisfy 2410&#x2266;A&#xd7;B&#x2266;2800.

Alloy powder for electrode and method for producing same

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Kanagawa, Japan

Kyoko Nakatsuji