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

A cathode active material, alkaline battery technology, applied in the direction of alkaline storage battery electrodes, alkaline storage batteries, battery electrodes, etc., can solve problems such as the inability to use high energy density, the inability to obtain large-capacity alkaline batteries, and the lack of battery capacity.

Inactive Publication Date: 2007-05-09
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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Embodiment

[0095] [Example]

[0096] The embodiment of the present invention will now be described with reference to FIGS. 1 to 6.

[0097] In this example, a cathode active material was manufactured, and an alkaline battery using the cathode active material was manufactured.

[0098] The cathode active material of this embodiment is used for an alkaline battery including nickel oxyhydroxide having a platelet structure. When X-ray diffraction is performed using CuKα rays, the cathode active material has diffraction peaks positioned in the range of diffraction angle 2θ of 8.4 degrees to 10.4 degrees.

[0099] The cathode active material of the present embodiment includes β'-type nickel oxyhydroxide, which has diffraction peaks positioned in the range of diffraction angle 2θ of 8.4 degrees to 10.4 degrees when X-ray diffraction is performed using CuK α rays. The crystal structure of this β'-type nickel oxyhydroxide is shown in Fig. 1. As shown in the same figure, β'-type nickel oxyhydroxide ha...

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Abstract

An alkaline battery-use anode active material of a layered crystal structure containing oxy nickel hydroxide. The anode active material has a diffraction peak at a diffraction angle 2theta position of 8.4-10.4 degrees due to X-ray diffraction by CuK alpha-ray. The alkaline battery has an anode containing an anode active material, a cathode containing a cathode active material and an alkaline solution as an electrolyte, and contains an anode active material having the above specific diffraction peak as the anode active material. A method of producing an alkaline battery-use anode active material of a layered crystal structure containing oxy nickel hydroxide has the step of oxidizing a layered-crystal-structure starting material consisting of beta type nickel hydroxide in an air stream containing an alkaline solution or alkali to produce the above anode active material.

Description

Technical field [0001] The present invention relates to a cathode active material for alkaline batteries, the material has a new crystal structure, and also relates to a method for manufacturing the material, and an alkaline battery having the cathode active material. Background technique [0002] Alkaline batteries, such as nickel-metal hydride batteries using β-type nickel hydroxide as the 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 (discharge 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 valence during charging and discharging. That is, at the time of charging, the cathode active material exists as β-type nickel oxyhydroxide (βNiOOH) in which Ni has a valence of 3. On the other hand, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/52C01G53/04H01M4/26H01M4/32H01M4/38H01M4/80H01M10/30
CPCH01M4/52H01M2004/028H01M4/32H01M10/30C01G53/04Y02E60/124H01M4/808C01P2006/40H01M2004/021C01P2002/72Y02E60/10
Inventor 小林哲郎近藤康仁松尾秀仁佐佐木严伊藤勇一野崎洋野中敬正妹尾与志木右京良雄伊藤真典
Owner TOYOTA JIDOSHA KK
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