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Beta''-Al2O3 solid electrolyte precursor aqueous tape casting slurry and preparation method thereof

A solid electrolyte, water-based casting technology, which is applied in the field of β″-Al2O3 solid electrolyte precursor water-based casting slurry and its preparation, can solve the problems of undiscovered solid electrolyte film, etc. The effect of good capacitance and easy large-scale production

Active Publication Date: 2010-06-23
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no relevant research on the preparation of β″-Al at home and abroad. 2 o 3 Solid Electrolyte Water-Based Casting Slurry and Preparation of β″-Al Using the Slurry 2 o 3 Technical Report on Solid Electrolyte Thin Film

Method used

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  • Beta''-Al2O3 solid electrolyte precursor aqueous tape casting slurry and preparation method thereof
  • Beta''-Al2O3 solid electrolyte precursor aqueous tape casting slurry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The ammonium citrate dispersant that accounts for 0.05wt% of the total amount is uniformly dispersed in 54.95wt% deionized water, and 15wt% (corresponding volume percentage content is 36%) of β"-Al 2 o 3 The precursor powder was ball milled for 18 hours, and the powder was evenly dispersed in deionized water to form slurry A; in A, the mixture of polyvinyl alcohol (PVA) and polyvinylpyrrolidone (PVB) was added (wherein PVA Accounting for 25% of the total weight percentage of PVA and PVB) as a binding agent, then add 5wt% propylene glycol as a plasticizer, continue ball milling for 20 hours, or stir for 8 hours to obtain slurry B; slurry B is filtered, vacuum Degassing to get β″-Al 2 o 3 Water-based casting slurry for solid electrolyte precursor. The slurry is cast on a polyethylene terephthalate (PET) casting film tape coated with silicone oil, and after the casting film is dried at 25° C. for 6 hours, the casting film is separated from the PET film tape, namely The...

Embodiment 2

[0023] The polyammonium methacrylate dispersant that accounts for 0.5wt% of the total amount is uniformly dispersed in 56.5wt% deionized water, and 20wt% (corresponding volume percentage content is 44%) of β"-Al 2 o 3 The precursor powder was ball milled for 15 hours, and the powder was uniformly dispersed in deionized water to form slurry A; in A, the mixture of polyvinyl alcohol (PVA) and polyvinylpyrrolidone (PVB) was added (wherein PVA account for 20% of the total weight percentage of PVA and PVB) as a binding agent, then add 3wt% glycerol as a plasticizer, continue ball milling for 12 hours, or stir for 8 hours to obtain slurry B; slurry B is filtered, vacuum Degassing to get β″-Al 2 o 3 Water-based casting slurry for solid electrolyte precursor. The slurry is cast on a polyethylene terephthalate (PET) cast film tape coated with silicone oil, and after the cast film is dried at 35° C. for 4 hours, the cast film is separated from the PET film tape, and then It can obta...

Embodiment 3

[0025] The Duramax D3005 ammonium polyacrylate dispersant, which accounts for 0.8wt% of the total amount, is uniformly dispersed in 53.2wt% deionized water, and 27wt% (corresponding to a volume percentage of 54%) of β″-Al is added 2 o 3 The precursor powder was ball milled for 12 hours, and the powder was evenly dispersed in deionized water to form slurry A; 18wt% of WB4101 polyacrylic acid was added to A as a binding agent, and then 1wt% of polyethylene glycol (PEG ) as a plasticizer, continue ball milling for 8 hours, or stir for 8 hours to obtain slurry B; filter slurry B and vacuum degas to obtain β″-Al 2 o 3 Water-based casting slurry for solid electrolyte precursor. The slurry is cast on a polyethylene terephthalate (PET) cast film tape coated with silicone oil, and after the cast film is dried at 45° C. for 2 hours, the cast film is separated from the PET film tape, and then It can obtain β″-Al with flat and smooth surface, uniform particle distribution, good flexibi...

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Abstract

The invention relates to beta ''-Al2O3 solid electrolyte precursor aqueous tape casting slurry and a preparation method thereof, belonging to the technical field of preparation of ceramic material slurry through aqueous tape casting process. The invention is characterized in that the slurry takes water as solvent, the used powder is prepared by sol gel process and the average grain size is smaller than 150mm and the slurry comprises the following components by weight percent: 15-45 of beta''-Al2O3 precursor powder, 0.05-3 of dispersing agent, 5.0-25 of adhesive, 0.02-5 of plasticizer and 43.98-54.95 of deionized water. Through using the dispersing agent to disperse the powder in the deionized water, ball milling, adding the adhesive and the plasticizer, secondary ball milling or mixing, filtering and vacuum degassing, aqueous tape casting slurry with good dispersivity is obtained. The surface of cast film made of the slurry is flat and smooth, particles are evenly distributed and the flexibility and the workability are good. The utility model has the advantages that the preparation technology is simple and environment-friendly, the cost is low large-scale production can be easily realized and the method is suitable for preparing aqueous tape casting slurry of a plurality of kinds of ceramic powder prepared through soft chemical processes such as sol gel process, chemical co-precipitation process and the like.

Description

technical field [0001] The present invention relates to a kind of β "-Al 2 o 3 Solid electrolyte precursor water-based casting slurry and preparation method thereof, especially related to a β″-Al prepared by sol-gel method 2 o 3 The invention discloses a solid electrolyte precursor water-based casting slurry and a preparation method thereof, belonging to the technical field of preparing ceramic material slurry by water-based casting. Background technique [0002] β″-Al 2 o 3 Solid electrolyte (Beta″-Alumina Solid Electrolytes, BASE) is an ionic conductor, and there is a loose sodium-oxygen layer in its structure for the migration of sodium ions, which is accompanied by material migration while transferring charges. Therefore, β″-Al 2 o 3 Solid electrolytes have broad application prospects in the energy field. In the power system, the high-efficiency thermoelectric energy direct conversion device-sodium heat engine (Sodium Heat Engine, SHE or Alkali Metal Thermal to El...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622
Inventor 谭强强徐宇兴陈晓晓
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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