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Highly-absorbent and highly-oxidation-resistant zinc-silver battery diaphragm and preparation method thereof

An oxidation resistance, zinc-silver battery technology, applied in battery pack parts, circuits, electrical components, etc., can solve the problems of easy agglomeration, the liquid absorption of inorganic oxides needs to be improved, and the uniformity of the diaphragm is affected, and the production process can be achieved. Simple, excellent comprehensive performance of diaphragm, low cost effect

Inactive Publication Date: 2013-11-27
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ultrafine inorganic oxides are easy to agglomerate in high-viscosity cellulose acetate solutions, which affects the uniformity of the prepared separator, and the liquid absorption of the added inorganic oxides needs to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Slowly add 2.0g of 3-aminopropyltriethoxysilane into 100ml of water, stir and mix evenly. Add 20g NaA zeolite particles (2.0μm) to the above solution and continue stirring for 6h. After centrifuging and washing twice, drying at 80° C. for 12 hours, the surface-modified inorganic particles were obtained. Add 3.5 g of cellulose acetate, 0.7 g of NaA zeolite, and 2.0 g of water into 50 g of acetone, ball mill for 4 hours, and vacuum defoam to obtain an ideal film-forming slurry. A composite film with a wet film thickness of about 50 μm was prepared on a glass plate by the film-hanging method, dried at room temperature for 2 hours, then dried in an oven at 80°C for 6 hours, and finally heated at 60°C with 100 N / cm 2 The organic-inorganic composite separator was obtained by pressing with a roller machine under a certain pressure.

[0029] The above composite separators were tested.

[0030] Thickness test results: The dry film thickness is 16 μm.

[0031] High temperatur...

Embodiment 2

[0035] Slowly add 1.5g of vinyltrimethoxysilane into 100ml of water, stir and mix evenly. Add 20g of MFI zeolite particles (2.5μm) to the above solution and continue to stir for 6h. After centrifuging and washing twice, drying at 80° C. for 12 hours, the surface-modified inorganic particles were obtained. Add 3.5 g of cellulose acetate, 1.2 g of MFI zeolite, and 1.5 g of water into 50 g of acetone, ball mill for 4 hours, and vacuum defoam to obtain an ideal film-forming slurry. A composite film with a wet film thickness of about 60 μm was prepared on a glass plate by the film-hanging method, dried at room temperature for 2 hours, then dried in an oven at 80°C for 6 hours, and finally dried at 50°C at 120 N / cm 2 The organic-inorganic composite separator was obtained by pressing with a roller machine under a certain pressure.

[0036] The above composite separators were tested.

[0037] Thickness test results: The dry film thickness is 25 μm.

[0038] High temperature test r...

Embodiment 3

[0042] Slowly add 3.2g of vinyltrimethoxysilane into 100ml of water, stir and mix evenly. Add 20g Al to the above solution 2 o 3 Particles (0.5μm), continue to stir for 6h. After washing twice with water, it was dried at 80° C. for 12 hours to obtain surface-modified inorganic particles. 5.0g methyl hydroxypropyl cellulose, 2.0g Al 2 o 3 Particles and 3.6g of water were added to a mixed solvent of 80g of acetone and N-methylformamide (mass ratio 50:50), ball milled for 4 hours, and the ideal film-forming slurry was obtained after vacuum defoaming. A composite film with a wet film thickness of about 50 μm was prepared on a glass plate by the film-hanging method, dried at room temperature for 2 hours, then dried in an oven at 80°C for 6 hours, and finally dried at 80°C at 100 N / cm 2 The organic-inorganic composite separator was obtained by pressing with a roller machine under a certain pressure.

[0043] The above composite separators were tested.

[0044] Thickness test re...

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Abstract

The invention relates to the field of the preparation of zinc-silver alkaline battery diaphragms, and especially relates to a highly-absorbent and highly-oxidation-resistant zinc-silver battery diaphragm and a preparation method thereof. The diaphragm comprises an organic polymer material and inorganic particles dispersed in the organic polymer material, and the composite diaphragm is obtained through a film forming technology of a mixed slurry comprising the inorganic particles and the organic polymer material. The organic polymer material is used to realize the flexibility and the silver resistance of the diaphragm, and the above hydrophilic inorganic material is used to realize the high absorbency, the strong oxidation resistance and the strong alkaline corrosion resistance of the diaphragm; and the inorganic particles guarantee the dimensional stability of the diaphragm. The inorganic particles and the organic polymer material are uniformly mixed in a solvent and undergo casting or knifing, drying and the like to obtain the composite diaphragm. The inorganic material and the traditional organic polymer material are compounded in the invention, so the diaphragm integrates the advantage of the above two materials, overcomes the disadvantages of traditional zinc-silver battery diaphragms, and has the characteristics of simple film forming technology, low cost, superior comprehensive properties, and easy large-scale heavy-gauge production.

Description

technical field [0001] The invention relates to the field of preparation of alkaline battery separators such as zinc and silver, in particular to a zinc-silver battery composite separator with high liquid absorption and oxidation resistance and a preparation method thereof. Background technique [0002] The development of zinc-silver batteries began in the 19th century. Due to their high specific energy, high specific power, stable voltage, high continuous use safety, good reliability, and environmental friendliness, they are widely used in missiles, launch vehicles, torpedoes, return For military equipment with special requirements such as satellites, zinc-silver batteries are also widely used in news photography, TV cameras, portable communication machines, walkie-talkies, etc., and zinc-silver batteries made of button-type miniature can be used in electronic watches, Hearing aids, computers, and pacemakers, among others. [0003] Zinc-silver single battery is composed of...

Claims

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Application Information

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IPC IPC(8): H01M2/16H01M50/411H01M50/434H01M50/443H01M50/446
CPCY02E60/12Y02E60/10
Inventor 肖伟赵丽娜刘建国严川伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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