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Highly dispersed sliver powder and conductive silver paste for film batteries

A high-dispersion type, thin-film battery technology, applied to conductive materials dispersed in non-conductive inorganic materials, conductive layers on insulating carriers, etc., can solve the problems of easy agglomeration and poor dispersion of nano-silver powder, and achieve reasonable particle size distribution , Improve electrical conductivity and reduce dosage

Active Publication Date: 2013-07-10
SUZHOU YUXI NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a highly dispersed silver powder for the problems of easy agglomeration and poor dispersion of nano silver powder in silver paste in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Dissolve 100 grams of acrylic resin in a mixed solvent of 300 grams of toluene and butanone, including 200 grams of toluene and 100 grams of butanone, and stir well; then add 5 grams of 2,4,6-trimethylbenzoyl- Diphenylphosphine oxide, continue to stir evenly; add 5 grams of dispersant polyvinyl alcohol solution with a mass fraction of 6%, stir evenly to obtain a stable suspension, and finally place the suspension under ultraviolet light for photopolymerization , the UV light intensity is 120 W / cm 2 , the light time is 3 minutes, the polymer microsphere dispersion liquid is obtained, filtered, and the polymer microspheres are prepared;

[0027] 2. Add distilled water in the obtained filter cake of step 1, stir, be mixed with 40% polymer microsphere dispersion, get 50 grams of this polymer microsphere dispersion, add the silver nitrate solution of 50 grams 2mol / L and 2.5 grams of dispersant polyvinylpyrrolidone, stir evenly, heat up to 40°C, then add 5 grams of 0.5mol...

Embodiment 2

[0030] 1. Dissolve 100 grams of acrylic resin in a mixed solvent of 600 grams of toluene and butanone, including 400 grams of toluene and 200 grams of butanone, and stir well; then add 0.5 grams of 2,4,6-trimethylbenzoyl- Diphenylphosphine oxide, continue to stir evenly; add 10 grams of dispersant polyvinyl alcohol solution with a mass fraction of 6%, stir evenly to obtain a stable suspension, and finally place the suspension under ultraviolet light for photopolymerization , the UV light intensity is 120 W / cm 2 , the light time is 5 minutes, the polymer microsphere dispersion liquid is obtained, filtered, and the polymer microspheres are prepared;

[0031] 2. Add distilled water in the obtained filter cake of step 1, stir, be mixed with 60% polymer microsphere dispersion, get 50 grams of this polymer microsphere dispersion, add the silver nitrate solution of 150 grams 2mol / L and 10 grams of dispersant polyvinylpyrrolidone, stir evenly, heat up to 60°C, then add 7.5 grams of 0...

Embodiment 3

[0034] 1. Dissolve 100 grams of acrylic resin in a mixed solvent of 450 grams of toluene and butanone, including 300 grams of toluene and 150 grams of butanone, and stir well; then add 0.25 grams of 2,4,6-trimethylbenzoyl- Diphenylphosphine oxide, continue to stir evenly; add 8 grams of dispersant polyvinyl alcohol solution with a mass fraction of 6%, stir evenly to obtain a stable suspension, and finally place the suspension under ultraviolet light for photopolymerization , the UV light intensity is 120 W / cm 2 , the light time is 4 minutes, the polymer microsphere dispersion is prepared, filtered, and the polymer microspheres are prepared;

[0035]2. Add distilled water in the obtained filter cake of step 1, stir, be mixed with 60% polymer microsphere dispersion, get 50 grams of this polymer microsphere dispersion, add the silver nitrate solution of 100 grams 2mol / L and 5 grams of dispersant polyvinylpyrrolidone, stir evenly, heat up to 60 ° C, then add 25 grams of 0.5 mol / L...

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Abstract

The invention discloses highly dispersed sliver powder and conductive silver paste for film batteries. The highly dispersed sliver powder comprises polymer microspheres and nano-sliver coatings on the surfaces of the polymer microspheres. The polymer microspheres are made from methacrylic resin, photoinitiator 2, 4, 6-trimethylbenzoyl-diphenylphosphine oxide, and polyvinyl alcohol by ultraviolet irradiation. The conductive silver paste for film batteries is formed by well mixing the highly dispersed sliver powder with glass binder and organic solvent. The highly dispersed sliver powder has the advantages that the polymer microspheres are predictable and controllable in morphology and reasonable in size distribution by increasing or decreasing the time of UV (ultraviolet irradiation), the nano-silver powder synthetized in situ can be evenly and compactly coated on the surfaces of the polymer microspheres, the consumption of noble metal, the sliver powder, can be decreased, production cost is lowered, dispersibility and stability of the nano-sliver powder are also increased greatly, and conductivity of the sliver paste is further increased.

Description

technical field [0001] The invention belongs to the technical field of conductive silver paste preparation, in particular to a highly dispersed silver powder and conductive silver paste for thin film batteries. Background technique [0002] Silver powder and its electronic paste are the most widely used and the largest amount of precious metal powder in the electronics industry, and are key functional materials for the production of various electronic components. The dispersion of silver powder in conductive silver paste is very important. Due to the small particle size and high surface activation energy of nano-silver powder, it is difficult to disperse and agglomerates easily. [0003] Therefore, how to improve the dispersion stability of nano-silver powder in silver paste has always been a research hotspot. Chinese patent (CN 101003907 B) discloses a method for preparing nano-silver-coated silicon dioxide metal-dielectric composite particles, which uses sonoelectrochemi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02C08F120/00C08F2/48H01B5/14H01B1/16H01B1/22
Inventor 张宇
Owner SUZHOU YUXI NEW MATERIAL TECH
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