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A kind of flexible inorganic solid electrolyte film and its preparation and application

A solid electrolyte and inorganic technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, batteries, etc., can solve the problems of high equipment requirements, complicated preparation process, high production cost, etc., and achieve simple preparation method, large specific surface area and low cost Effect

Active Publication Date: 2020-06-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a flexible inorganic solid electrolyte film and its preparation and application, which overcomes the complex preparation process, high equipment requirements and high production cost in the prior art, and the weight of the obtained film is not light enough, flexible , ionic conductivity and poor safety performance

Method used

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  • A kind of flexible inorganic solid electrolyte film and its preparation and application
  • A kind of flexible inorganic solid electrolyte film and its preparation and application
  • A kind of flexible inorganic solid electrolyte film and its preparation and application

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Weigh 2.74g of lithium carbonate, 4.89g of lanthanum oxide, and 0.332g of niobium pentoxide, respectively, place them in a 100mL beaker, and dry them under vacuum at 60°C for 12h. Weigh 15g of ethylene glycol and 15g of acetic acid in a beaker, add 6.71g of zirconium n-butoxide to the mixed solution of the two, stir the mixed solution of ethylene glycol, acetic acid and zirconium n-butoxide with a glass rod, pour In the dried medicine, magnetic stirring was carried out for 1 h to obtain LLZN gel. The LLZN gel was dried in a vacuum oven at 80 °C for 72 h to obtain the LLZN precursor. The LLZN precursor was placed in a planetary ball mill and ball milled for 12 hours to obtain LLZN precursor powder. Finally, the LLZN precursor powder was placed in an alumina crucible and calcined in a muffle furnace at 900 °C for 8 h to obtain LLZN garnet-type inorganic solid electrolyte particles with an average diameter of about 2.57 μm.

[0040] Weigh 80 mg of the prepared LLZN particl...

Embodiment 2

[0046] Weigh 80 mg of LLZN particles (Example 1) prepared by the sol-gel method and 80 mg of lithium perchlorate, put them in a 100 mL beaker, then add 80 mL of absolute ethanol, and crush the cells for 3 hours to obtain the LLZN dispersion.

[0047] Weigh 40 mg of graphite oxide and 80 mg of lithium perchlorate, put them in a 50 mL beaker, then add 20 mL of absolute ethanol, crush the cells for 3 h, and ultrasonicate in a water bath for 1 h to obtain a graphite oxide dispersion.

[0048] Take a PVDF filter membrane with a pore size of 0.22 μm, place it on the sand core and wet it, and cover the filter bottle. After stirring the LLZN dispersion evenly, quickly pour it into the filter bottle. After the solvent is drained, slowly pour the graphite oxide dispersion liquid after ultrasonication in the water bath into the bottle along the wall of the filter bottle, and vacuum filter for 12 hours to obtain a composite film. The composite film was placed in a blast oven at 60° C. for...

Embodiment 3

[0050] Weigh 80 mg of LLZN particles (Example 1) prepared by the sol-gel method and 80 mg of lithium perchlorate, put them in a 100 mL beaker, then add 80 mL of absolute ethanol, and crush the cells for 3 hours to obtain the LLZN dispersion.

[0051] Weigh 80 mg of graphite oxide and 80 mg of lithium perchlorate, put them in a 50 mL beaker, then add 40 mL of absolute ethanol, crush the cells for 3 h, and ultrasonicate in a water bath for 1 h to obtain a graphite oxide dispersion.

[0052] Take a PVDF filter membrane with a pore size of 0.22 μm, place it on the sand core and wet it, and cover the filter bottle. After stirring the LLZN dispersion evenly, quickly pour it into the filter bottle. After the solvent is drained, slowly pour the graphite oxide dispersion liquid after ultrasonication in the water bath into the bottle along the wall of the filter bottle, and vacuum filter for 24 hours to obtain a composite film. The composite film was placed in a blast oven at 60° C. for...

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Abstract

The invention relates to a flexible inorganic solid-state electrolyte film and its preparation and application. The flexible inorganic solid-state electrolyte film is: graphite oxide and Li 6.75 La 3 Zr 1.75 Nb 0.25 o 12 LLZN inorganic solid electrolyte particles are composited to form thin films. Preparation: Stir the LLZN dispersion evenly, pour it on a sand core with a filter membrane, filter it with suction, then pour it into the dispersion of graphite oxide, filter it with vacuum, and dry it. The preparation method of the invention is simple, the cost is low, and the industrialization is easy. The prepared inorganic solid electrolyte film is light in weight, has good flexibility, good ionic conductivity and excellent safety performance, and has broad application prospects in the fields of flexible electronic energy storage devices, flexible sensing and flexible display.

Description

technical field [0001] The invention belongs to the field of solid electrolyte materials and their preparation and application, in particular to a flexible inorganic solid electrolyte film and its preparation and application. Background technique [0002] With the improvement of people's living standards and the rapid development of technology and intelligent industries, various mobile electronic communication devices, flexible display devices and flexible wearable electronic devices have emerged rapidly. At the same time, these devices also put forward new and higher requirements for energy storage devices: safety, flexibility and lightness. Lithium-ion batteries, due to their high operating voltage and energy density, low self-discharge rate, and relatively small environmental pollution, have become ideal energy storage carriers. However, the traditional lithium-ion battery itself is rigid, and the electrolyte used is a liquid electrolyte. During the working process, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0562H01M10/058H01M10/0525
CPCH01M10/0525H01M10/0562H01M10/058H01M2220/20Y02E60/10Y02P70/50
Inventor 王宏志孙健其李耀刚张青红侯成义
Owner DONGHUA UNIV
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