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Preparation method and application of solid electrolyte

A solid-state electrolyte and solid-state technology, applied in the direction of solid electrolyte, electrolyte, non-aqueous electrolyte, etc., can solve the problem of narrow electrochemical window, achieve the effect of wide electrochemical window, not easy to micro-short circuit, and reduce the possibility

Active Publication Date: 2022-03-15
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the preparation method of sodium superionic conductor solid electrolyte usually adopts the method of solid phase sintering, although the obtained sodium superionic conductor solid electrolyte has good ionic conductivity, but the electrochemical window is narrow

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  • Preparation method and application of solid electrolyte
  • Preparation method and application of solid electrolyte
  • Preparation method and application of solid electrolyte

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preparation example Construction

[0040] The invention provides a method for preparing a solid electrolytic cell, comprising the following steps:

[0041] The sodium-containing salt, phosphorus-containing salt, zirconium oxide and silicon oxide are first mixed, and then calcined to obtain a sodium zirconium phosphate precursor;

[0042] After the sodium zirconium silicophosphate precursor, binder and sodium metasilicate are mixed for the second time, tablet pressing and liquid phase sintering are performed sequentially to obtain the solid electrolyte.

[0043] In the present invention, unless otherwise specified, all preparation materials are commercially available products well known to those skilled in the art.

[0044] In the present invention, sodium-containing salt, phosphorus-containing salt, zirconium oxide and silicon oxide are first mixed, and then calcined to obtain a sodium zirconium phosphate precursor.

[0045] In the present invention, the sodium-containing salt is preferably sodium carbonate. ...

Embodiment 1

[0072] 0.9937g of sodium carbonate, 1.5403g of zirconia, 0.7511g of silicon dioxide and 0.7548g of ammonium dihydrogen phosphate are placed in a planetary ball mill, 24g of zirconia balls and 4mL of ethanol are added for mixed ball milling. at 400 rpm for 12 hours; after vacuum drying at 80°C for 12 hours, calcining at 1000°C in an air atmosphere for 12 hours, cooling to room temperature, and grinding for 15 minutes to obtain a sodium zirconium phosphate precursor;

[0073] Mix 1.025g of polyvinyl alcohol and 23.75g of deionized water, and put it in an oil bath at 80°C for 1 hour under stirring until the polyvinyl alcohol is completely dissolved to obtain an aqueous solution of polyvinyl alcohol;

[0074] 3.2g of the sodium zirconium phosphate precursor and 0.16g sodium metasilicate (5% of the zirconium phosphate precursor) were placed in a planetary ball mill, and 24g of zirconia and 4mL of ethanol were added for ball milling. The rotation speed of the ball mill is 400rpm, an...

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Abstract

The invention relates to the technical field of solid electrolyte, in particular to a preparation method and application of solid electrolyte. The invention provides a preparation method of a solid-state electrolytic tank, which comprises the following steps: mixing a sodium-containing salt, a phosphorus-containing salt, a zirconium oxide and a silicon oxide for the first time, and calcining to obtain a sodium zirconium silicophosphate precursor; and mixing the sodium zirconium silicophosphate precursor, a binder and sodium metasilicate for the second time, and sequentially carrying out tabletting and liquid-phase sintering to obtain the solid electrolyte. The solid electrolyte prepared by the preparation method has a relatively wide electrochemical window.

Description

technical field [0001] The invention relates to the technical field of solid electrolytes, in particular to a preparation method and application of a solid electrolyte. Background technique [0002] In the past decade, lithium-ion batteries have developed rapidly. However, the increase in price hinders the further application of lithium-ion batteries, so it is imperative to find cheaper batteries to replace lithium-ion batteries. Due to the abundant sodium resources and low cost, Na-ion batteries are considered to be the best energy storage devices to replace Li-ion batteries. Unlike organic liquid electrolytes, which are easy to leak, flammable, and cannot effectively suppress dendrites, solid-state sodium electrolytes are widely used in sodium metal batteries to improve safety. [0003] So far, many types of solid sodium electrolytes have been studied, such as β-alumina type, sulfide type, and sodium superionic conductor type. The extremely high sintering temperature (1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/054
CPCH01M10/0562H01M10/054H01M2300/0068H01M2300/0091Y02E60/10
Inventor 郭洪王晗赵根福刘婷婷
Owner YUNNAN UNIV
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