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Alkaline button cell and method for producing same

一种碱性电池、制造方法的技术，应用在二次电池制造、干电池、电池电极等方向

Active Publication Date: 2006-04-05
MAXELL HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, in order to form a metal layer on the inner surface of the negative electrode sealing body in advance before assembling the battery, a special process such as a plating process is required.

Method used

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  • Alkaline button cell and method for producing same
  • Alkaline button cell and method for producing same
  • Alkaline button cell and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0025] In Embodiment 1, an example of the manufacturing method of the coin alkaline battery of this invention is demonstrated.

[0026] The manufacturing method of the button alkaline battery of this embodiment includes sealing the positive electrode container with the negative electrode sealing body through the gasket, and setting the negative electrode containing the negative electrode active material and the alkaline electrolyte in the sealed space thus formed.

[0027] Such as figure 1 As shown, the manufacturing method of the button alkaline battery of this embodiment includes the following metal layer forming step, that is, in the state where the negative electrode 3 and the negative electrode sealing body 5 are arranged so that the negative electrode 3 and the negative electrode sealing body 5 are in contact, The negative electrode 3 and the negative electrode sealing body 5 are left for a predetermined period of time to form the metal layer 7 on the surface of the nega...

Embodiment approach 2

[0071] In Embodiment 2, the button alkaline battery manufactured by the manufacturing method of the button alkaline battery of Embodiment 1 is demonstrated.

[0072] As shown in FIG. 2A, the button alkaline battery 1 of the present embodiment uses a negative electrode sealing body 5 to seal the positive electrode container 4 through the gasket 6, and in the closed space formed in this way, the negative electrode containing the negative electrode active material and the alkaline electrolyte is arranged. 3.

[0073]The negative electrode 3 contains, for example, a powdery negative electrode active material and an alkaline electrolyte. The negative electrode active material is composed of mercury-free zinc or mercury-free zinc alloy. The negative electrode 3 contains most of the alkaline electrolyte constituting the button alkaline battery.

[0074] The positive electrode 8 contains a molded body made of a positive electrode active material such as silver oxide, manganese dioxi...

Embodiment 1

[0092] (Preparation of Alkaline Electrolyte)

[0093] 550 g of sodium hydroxide (purity 96%), 100 g of zinc oxide (purity 99%), and 10 g of indium hydroxide were added to 340 g of water to obtain a mixed solution, which was stirred for 20 minutes (stirring speed: 1500 rpm). Next, 1010 g of water was further added to the above mixed solution, followed by stirring for another 20 minutes (stirring speed: 1500 rpm). The mixed solution obtained by the above method was left to stand at room temperature (25° C.) for 3 days, and thereafter, undissolved indium hydroxide was removed by taking out the supernatant liquid from the mixed solution. The upper clarified liquid was used as an alkaline electrolyte.

[0094] The concentration of indium in the alkaline electrolyte was analyzed using ICP (Inductively Coupled Plasma Luminescence Analyzer) ("IRIS 1000" manufactured by Japan Jarel Ash Co., Ltd.). The indium concentration in the alkaline electrolyte was 789 ppm. Hereinafter, the con...

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Abstract

A button-type alkaline battery in which an anode 3 containing an anode active material and an alkaline electrolyte is disposed in a sealed space formed by sealing a cathode housing 4 with an anode sealing member 5, with a gasket 6 being interposed between the cathode housing 4 and the anode sealing member 5. The anode active material includes mercury-free zinc or a mercury-free zinc alloy. The button-type alkaline battery includes a metal layer 7 that is disposed between and in contact with the anode sealing member 5 and the anode 3. The metal layer 7 includes a base material containing zinc, and at least one metal M selected from the group consisting of indium, bismuth, and tin, with the metal M having segregated in the base material.

Description

technical field [0001] The present invention relates to a button alkaline battery and a manufacturing method thereof. Background technique [0002] A button alkaline battery has a structure in which a positive electrode container is sealed with a negative electrode sealing body through a gasket, and in the thus formed closed space, a negative electrode, a separator, and a positive electrode are arranged. Conventional button alkaline batteries generate hydrogen gas during storage, and this hydrogen gas generation causes battery expansion and capacity degradation. [0003] The generation of the above-mentioned hydrogen gas is caused by the following two kinds of reactions. The first reaction is a self-corrosion reaction of zinc contained in the negative electrode as the negative electrode active material. Zinc dissolves while generating hydrogen gas in the alkaline electrolyte. The second type of reaction is a local battery reaction occurring at the interface between the ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/12H01M4/64H01M4/42H01M4/62H01M6/06H01M2/04C22C18/00H01M4/66H01M10/04H01M50/119H01M50/124H01M50/167
CPCH01M2/08Y02E60/12H01M2/0222H01M6/06H01M10/04H01M4/66H01M4/42H01M2/0272H01M2/0413H01M2/0275C22C18/00Y10T29/4911H01M50/109H01M50/1243H01M50/171Y02P70/50H01M50/167H01M50/119H01M50/124
Inventor 玉腰博美菅原久典弘濑敬久一条稔佐藤淳
Owner MAXELL HLDG LTD
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