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Zinc-silver battery composite diaphragm with inorganic coating and preparation method of composite diaphragm

A technology of inorganic coating and composite diaphragm, applied in battery pack parts, circuits, electrical components, etc., can solve the problem that the liquid absorption of inorganic materials is not fully exerted, affecting the high current charging and discharging performance of zinc-silver batteries, and the mechanical properties of composite diaphragms. Improve the strength and other issues to achieve the effect of improving electrical performance and service life, low cost, and high liquid absorption rate

Inactive Publication Date: 2013-11-20
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 solution, which affects the uniformity of the prepared separator; at the same time, due to the coating of organic materials, the liquid absorption of inorganic materials is not fully exerted, which affects the zinc-silver battery. The high current charge and discharge performance, and the mechanical strength of the prepared composite separator needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Slowly add 2.0g of 3-aminopropyltriethoxysilane into 100ml of water, stir and mix evenly. Add 10 g of NaA zeolite particles (2.0 μm) to the above solution, and continue to stir for 6 h with the assistance of ultrasonic waves. After centrifuging and washing twice, drying at 80° C. for 12 hours, the surface-modified inorganic particles were obtained. Add 0.5 g of cellulose acetate, 2.0 g of NaA zeolite particles, and 0.8 g of water into 50 g of acetone, perform ultrasonic treatment for 1 h, and ball mill for 4 h to obtain an ideal coating slurry. Polyester non-woven fabric (20g / m 2 ) as the base film, the inorganic coating was obtained on both surfaces of the base film by the dip coating method, dried at room temperature for 2 hours, then dried in an oven at 80°C for 6 hours, and finally at 100°C with 100N / cm 2 The organic-inorganic composite separator was obtained by pressing with a roller machine under a certain pressure.

[0028] The above composite separators were ...

Embodiment 2

[0034] Slowly add 1.5g of vinyltrimethoxysilane into 100ml of water, stir and mix evenly. Add 10g of MFI zeolite particles (2.5μm) 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 0.8g of methyl hydroxyethyl cellulose, 2.5g of MFI zeolite particles, and 0.5g of water into 50g of acetone, ultrasonically treat for 1h, and ball mill for 4h to obtain an ideal coating slurry. Polyester non-woven fabric (17g / m 2 ) as the base film, the inorganic coating was obtained on both surfaces of the base film by the dip coating method, dried at room temperature for 2 hours, then dried in an oven at 100°C for 6 hours, and finally at 80°C with 120N / cm 2 The organic-inorganic composite separator was obtained by pressing with a roller machine under a certain pressure.

[0035] The above composite separators were tested.

[0036] Thickness test results: The dry fi...

Embodiment 3

[0041] Slowly add 3.2g of vinyltrimethoxysilane into 100ml of water, stir and mix evenly. Add 10 g 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. 0.5g cellulose acetate, 1.5g Al2 o 3 Particles and 1.2g of water were added to 50g of acetone, ultrasonically treated for 1h, and ball milled for 4h to obtain an ideal coating slurry. Polypropylene non-woven fabric (30g / m 2 ) as the base film, the inorganic coating was obtained on both surfaces of the base film by the dip coating method, dried at room temperature for 2 hours, then dried in an oven at 80°C for 6 hours, and finally at 150°C with 90N / cm 2 The organic-inorganic composite separator was obtained by pressing with a roller machine under a certain pressure.

[0042] The above composite separators were tested.

[0043] Thickness test results: The dry film thickness is 32 μm.

...

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Abstract

The invention relates to the field of preparation of diaphragms of alkaline batteries such as zinc-silver batteries, and in particular relates to a zinc-silver battery composite diaphragm with an inorganic coating and a preparation method of the zinc-silver battery composite diaphragm. The composite diaphragm comprises an organic polymer material bottom film and the inorganic coating which is coated on the surface of the organic polymer material bottom film. The organic polymer material bottom film is used for ensuring the flexibility of the diaphragm, and a hydrophilic inorganic material endows the diaphragm with high liquid absorption rate, high oxidation resistance and high alkaline corrosion resistance. Meanwhile, inorganic particles have a function of regulating the aperture size of the composite diaphragm. Film-coating paste is obtained by mixing the inorganic particles, an adhesive, additives and the like, the inorganic coating is coated on the surface of the organic polymer material bottom film, and the composite diaphragm is obtained through a drying process and the like. An inorganic material and a conventional organic polymer material are composited, the advantages of the two materials are integrated, and the defects of a conventional zinc-silver battery diaphragm are overcome. The zinc-silver battery composite diaphragm has the characteristics of simple filming process, low cost, high comprehensive performance and the like, and the large-scale and large-size production of diaphragms is facilitated.

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 an inorganic coating 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 plate group, single case, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M50/449
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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