Mercury-free zinc paste of button alkaline zinc-manganese dioxide cell and preparation method for mercury-free zinc paste

A zinc-manganese battery and zinc paste technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as high cost and environmental pollution, and achieve the effects of cost reduction, simple formula, and favorable battery storage.

Inactive Publication Date: 2012-07-11
无锡耐克赛尔电池有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, mercury will pollute the environment to a certain extent, so people began to look for alternatives to mercury
Indium and barium can replace mercury. Invention CN 1913199A uses indium hydroxide and indium oxide to make mercury-free button battery zinc paste, but indium hydroxide and indium oxide must be used at the same time, and the total amount of the two is not less than 1% of the zinc powder. higher cost

Method used

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  • Mercury-free zinc paste of button alkaline zinc-manganese dioxide cell and preparation method for mercury-free zinc paste
  • Mercury-free zinc paste of button alkaline zinc-manganese dioxide cell and preparation method for mercury-free zinc paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1). Take 90kg of potassium hydroxide, 15kg of zinc oxide, and 95kg of pure water. First, pour 95kg of pure water into the preparation tank. Under stirring, add 90kg of potassium hydroxide into the preparation tank and let it dissolve. Add 15kg of zinc oxide into the preparation tank while it is hot under stirring, let it dissolve, filter it with a filter element with a pore size of 1 μm after cooling, and then adjust the filtered electrolyte to a potassium hydroxide concentration of 42.5%, i.e. get electrolyte;

[0024] (2) Take 9,810g of mercury-free zinc powder, 60g of sodium carboxymethyl cellulose, 30g of sodium polyacrylate, 10g of indium hydroxide, and 90g of zinc oxide. After weighing each material, pour them into the agate of the three-dimensional ball mill mixing equipment Grind in the cup, start mixing for 30 minutes, slowly add 4kg of the above electrolyte into the mixing cup, vacuumize to below 1 kPa after adding, grind for 45 minutes, stop stirring, open t...

Embodiment 2

[0028] (1) Get 90kg potassium hydroxide, 15kg zinc oxide, 93kg pure water, pour 93kg pure water into the preparation tank earlier, under the state of stirring, add 90kg potassium hydroxide in the preparation tank, allow it to dissolve, then in While stirring, add 15kg of zinc oxide to the preparation tank to dissolve it while it is hot. After cooling, filter it with a filter element with a pore size of 1 μm, and then add pure water to the filtered electrolyte to adjust the concentration of potassium hydroxide to 32.5%. liquid;

[0029] (2) Take 9.800kg of mercury-free zinc powder, 65g of sodium carboxymethylcellulose (FH9), 35g of sodium polyacrylate, 40g of indium hydroxide, and 60g of zinc oxide. After weighing each material, pour them into the three-dimensional ball mill mixture Grind in the agate cup of the equipment, start mixing for 25 minutes, slowly add 2kg of the above electrolyte into the mixing cup, vacuumize to below 1 kPa after adding, grind for 60 minutes, stop s...

Embodiment 3

[0032] (1). Take 90kg of potassium hydroxide, 15kg of zinc oxide, and 95kg of pure water. First, pour 95kg of pure water into the preparation tank. Under stirring, add 90kg of potassium hydroxide into the preparation tank and let it dissolve. Add 15kg of zinc oxide into the preparation tank while it is hot under stirring, let it dissolve, filter it with a filter element with a pore size of 1 μm after cooling, and then adjust the filtered electrolyte to a potassium hydroxide concentration of 42.5%, i.e. get electrolyte;

[0033] (2) Take 9,820g of zinc powder containing 1.5% mercury, 60g of polyacrylate, 30g of sodium polyacrylate, and 90g of zinc oxide. After weighing each material, pour them into the agate cup of the three-dimensional ball mill mixing equipment for grinding, and turn on Mix for 30 minutes, slowly add 4kg of the above electrolyte into the mixing cup, vacuumize to below 1 kPa after adding, grind for 45 minutes, stop stirring, open the air valve, take out the zi...

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Abstract

The invention provides a mercury-free zinc paste of a button alkaline zinc-manganese dioxide cell and a preparation method for the mercury-free zinc paste. The preparation method comprises the following steps of: preparing the following raw materials in percentage by mass: 98 to 99.05 percent of mercury-free zinc powder, 0.4 to 1.9 percent of an adhesion agent, 0.01 to 0.6 percent of indium hydroxide and 0.05 to 1.5 percent of zinc oxide, wherein the adhesion agent comprises sodium carboxymethylcellulose and sodium polyacrylate, and the mass ratio of the sodium carboxymethylcellulose to the sodium polyacrylate is 0.1 to 10; grinding the raw materials in three-dimensional nonmetal ball milling mixing equipment for 5 to 100 minutes; adding electrolyte of which the mass is 38 to 43 percent of that of the mixture into the ball milling mixing equipment; vacuumizing the ball milling mixing equipment to be below 0.01 MPa; and mixing for 10 to 100 minutes to obtain the zinc paste. According to the preparation method, the used substances are mixed into a paste and treated under a vacuum condition, gases generated during the preparation of the zinc paste are exhausted, and the indium hydroxide is added to replace mercury so as to prevent the generation of gases, so that the environment is not polluted. Moreover, the sodium carboxymethylcellulose is added to prevent dispersed zinc powder from sedimentation and agglomeration because the viscosity of a zinc electrode is reduced, and the sodium carboxymethylcellulose acts together with the indium hydroxide to ensure that the cell shows high discharge performance. Therefore, the cell cannot deform by swelling, so that the cell can be conveniently stored, and the environment is not polluted because the indium hydroxide is added into the zinc paste to replace the mercury so as to prevent the generation of gases. The zinc paste prepared by the preparation method can be applied to mercury-free button cells.

Description

【Technical field】 [0001] The invention belongs to the technical field of batteries, in particular to a mercury-free zinc paste for a button-type alkaline zinc-manganese battery and its preparation. 【Background technique】 [0002] In alkaline zinc-manganese batteries, a certain amount of mercury is usually added as a corrosion inhibitor for zinc. This kind of mercury battery has large capacity and good storage performance. At present, the traditional production method of button batteries is to mix the anode active material with the binder, add it to the anode cup, and then add the electrolyte, so that the gas generated by the contact between the electrolyte and the active material is sealed in the battery, which is not conducive to battery storage; Moreover, mercury is added to the anode active material to prevent the generation of gas, which pollutes the environment. Zinc paste production is a key part of mercury-free button cells. Zinc paste is composed of main materials...

Claims

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Application Information

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IPC IPC(8): H01M4/42
CPCY02E60/12Y02E60/10
Inventor 靳忠效曹郁陈笛笛王青
Owner 无锡耐克赛尔电池有限公司
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