Alloy powder for electrode and method for producing same
AssigneePanasonic Corporation
InventorsHideaki Ohyama, Kyoko Nakatsuji, Yoshitaka Dansui, Shinichi Orimo, Yuko Nakamori, Hai-Wen Li, Kazutaka Ikeda
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Abstract
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° C. or greater for B minutes. A and B satisfy 2410≦A×B≦2800.
Claims7
An electrode alloy powder comprising a hydrogen storage alloy and magnetic material clusters,
- wherein said hydrogen storage alloy comprises 20 to 70 wt % of Ni,
- said magnetic material clusters comprise metal nickel, said magnetic material clusters have an average cluster size of 8 to 10 nm,
- said magnetic material clusters are deposited in a surface portion of said powder, and
- the cluster size of said magnetic material clusters increases gradually from the inside toward the outside of said surface portion.
Dependencies are inferred from the claim text.