Alkalline battery-use anode active material and production method therefor, and alkalline battery

Abstract

The present invention provides a sub-cathode active material for alkaline batteries, which has a lamellar structure including nickel oxyhydroxide. When X-ray diffraction is performed using CuKα rays, the cathode active material has a diffraction peak at a diffraction angle 2θ ranging from 8.4 degrees to 10.4 degrees. Furthermore, the present invention provides an alkaline battery comprising a cathode having a cathode active material, an anode having an anode active material, and an alkaline aqueous solution as an electrolytic solution. Furthermore, the present invention provides a method for manufacturing a cathode active material for an alkaline battery, the cathode active material having a lamellar structure including nickel oxyhydroxide. The production method has an oxidation process for producing the cathode active material in which a raw material made of β-type nickel hydroxide having a lamellar structure is subjected to oxidation.

Description

technical field [0001] The present invention relates to a cathode active material for alkaline batteries, said material having a novel crystal structure, a method of manufacturing said material, and an alkaline battery having said cathode active material. Background technique [0002] Alkaline batteries, such as nickel-metal hydride batteries using β-type nickel hydroxide as a cathode active material, are widely used in home appliances, communication equipment, AV-related equipment, and OA-related equipment. Such alkaline batteries are used not only as primary batteries (discharged only once), but also as secondary batteries (alkaline storage batteries) that are repeatedly charged and discharged. [0003] In alkaline batteries, the cathode active material changes its valency as it is charged and discharged. That is, at the time of charging, the cathode active material exists as β-type nickel oxyhydroxide (βNiOOH) in which the Ni valence is 3. On the other hand, when discha...

AI Technical Summary

Problems solved by technology

As a result, conventional alkaline batteries do not have sufficient battery capacity, and therefore, there is a problem that they cannot be used for electronic equipment or the like requiring high energy density

[0008] However, even with the above-mentioned conventional techniques, it is still difficult to make the utilization rate of nickel hydroxide equal to or higher than 100%, and it is still impossible to obtain a large-capacity alkaline battery

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