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Gel zinc paste for alkaline battery and preparation method thereof

An alkaline battery, gel-like technology, applied in the direction of electrode manufacturing, battery electrodes, primary battery electrodes, etc., can solve the problems of decreased utilization rate of negative electrode active materials, larger particles, increased internal resistance, etc., and easy to achieve product quality Controlling, beneficial to long-term storage, and reducing swelling and deformation

Inactive Publication Date: 2012-10-10
BEIJING CHANGLI UNION ENERGY TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The zinc paste currently used has poor stability in high-concentration strong alkali solution, especially when the battery is stored at a higher temperature, it is easier to dehydrate and hydrolyze, and the separated electrolyte migrates to the battery seal and the positive electrode, making the positive electrode change. Reduced performance, increased internal resistance, and worsened discharge performance
After hydrolysis, the dispersed zinc powder in the zinc paste will undergo sedimentation and aggregation, making the particles larger, reducing the surface area, and reducing the utilization rate of negative active materials
At the same time, the battery is prone to leakage and alkali climbing, which leads to its performance degradation

Method used

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Examples

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Effect test

specific Embodiment approach

[0016] Alkaline battery gel zinc paste of the present invention, its preferred embodiment is:

[0017] Including the mixture of zinc powder and alkaline electrolyte in a mass ratio of 100:30~50;

[0018] The zinc powder mixture includes mercury-free zinc powder, gelling agent, indium hydroxide or indium oxide, and zinc oxide mixed in a mass ratio of 100:0.5~5:0.01~0.1:1;

[0019] The alkaline electrolyte includes potassium hydroxide, zinc oxide, calcium oxide, sodium stannate and water mixed in a mass ratio of 40:6-7:0.2-0.5:0.05-0.1:52.5-53.5.

[0020] The gelling agent includes one or more of carboxymethyl cellulose, polyvinyl alcohol, polyacrylic acid, sodium polyacrylate and polyacrylic acid derivatives.

[0021] The preparation method of above-mentioned alkaline battery gel-like zinc paste of the present invention, its preferred embodiment comprises the following steps;

[0022] Mix mercury-free zinc powder with gelling agent, indium hydroxide or indium oxide, and zinc ...

specific Embodiment 1

[0035] (1) Take 40g of potassium hydroxide, 6g of zinc oxide, 0.5g of calcium oxide, 0.08g of sodium stannate, and 53.42g of water. First add water into the electrolyte preparation tank, add potassium hydroxide under stirring, let it dissolve, then add zinc oxide, calcium oxide and sodium stannate in turn to dissolve them all, and after cooling, you can get alkaline electrolytic solution liquid.

[0036] (2) Mix 100g of zinc powder, 0.05g of indium oxide, 1g of zinc oxide, 2g of sodium polyacrylate and 0.5g of carboxymethyl cellulose, and stir for 10 minutes to make them evenly mixed. Take 36g of the above electrolytic solution and mix it with the zinc powder mixture, and process it with a vacuum mixer for 8 minutes to obtain a gel-like zinc paste.

[0037] The zinc paste is used as the negative electrode to assemble the zinc-air battery, which can be stored at room temperature for more than 2 years, and the battery has no swelling and leakage.

specific Embodiment 2

[0038] (1) Take 40g of potassium hydroxide, 7g of zinc oxide, 0.2g of calcium oxide, 0.05g of sodium stannate, and 52.75g of water. First add water into the electrolyte preparation tank, add potassium hydroxide under stirring, let it dissolve, then add zinc oxide, calcium oxide and sodium stannate in turn to dissolve them all, and after cooling, you can get alkaline electrolysis liquid.

[0039] (2) Mix 100g of zinc powder, 0.08g of indium hydroxide, 1g of zinc oxide, 0.8g of polyacrylic acid and 1.2g of sodium polyacrylate, and stir for 10 minutes to make them evenly mixed. Take 40 g of the above electrolytic solution and mix it with the zinc powder mixture, and process it with a vacuum mixer for 10 minutes to obtain a gel-like zinc paste.

[0040] The zinc paste is used as the negative electrode to assemble the zinc-air battery, which can be stored at a high temperature of 50°C for more than 2 months, and the battery has no swelling and leakage.

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Abstract

The invention discloses gel zinc paste for an alkaline battery and a preparation method thereof. The gel zinc paste comprises zinc powder mixture and alkaline electrolyte which are mixed according to a mass ratio of 100 to 30-50; the zinc powder mixture comprises mercury-free zinc powder, gel, indium hydroxide or indium oxide and zinc oxide which are mixed according to a mass ratio of 100 to 0.5-5 to 0.01-0.1 to 1; the alkaline electrolyte comprises potassium hydroxide, zinc oxide, calcium oxide, sodium stannate and water which are mixed according to a mass ratio of 40 to 6-7 to 0.2-0.5 to 0.05-0.1 to 52.5-53.5. The gel comprises carboxymethyl cellulose, polyving akohol, polyacrylic acid, sodium polyacrylate, polyacrylic acid derivatives and the like. According to the gel zinc paste and the preparation method provided by the invention, the production process is simple, the product quality is easily controlled, the service life and storage period of the battery can be prolonged, and the application range of the battery can be enlarged.

Description

technical field [0001] The invention relates to a zinc paste applicable to alkaline manganese batteries, zinc-air batteries, etc., in particular to a gel-like zinc paste for alkaline batteries and a preparation method thereof. Background technique [0002] In recent years, with the increase of portable appliances and the development of zero-emission electric vehicles, people are looking for a high specific energy battery system to meet their requirements. As an efficient and clean green energy new technology, zinc-air battery has the advantages of large capacity, high specific energy, low cost, stable discharge performance, safety, and no pollution. It has become a development hotspot in the world energy field today. Chemical power source with huge market prospect. [0003] The working principle of the zinc-air battery is: zinc is the anode active material, oxygen in the air is the cathode active material, and potassium hydroxide is the electrolyte; the anode reaction of zi...

Claims

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Application Information

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IPC IPC(8): H01M4/42H01M4/04H01M4/06
CPCY02E60/12
Inventor 王国庆杨维谦
Owner BEIJING CHANGLI UNION ENERGY TECH CO
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