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Flexible whole-solid-state battery and preparation method of same

An all-solid-state battery and solid-state electrolyte technology, applied in secondary batteries, battery pack components, circuits, etc., can solve the problems of poor flexibility, poor rate performance and high-temperature performance of all-solid-state batteries, and achieve improved conductivity and Liquid retention capacity, good battery rate performance and high temperature performance, and the effect of enhancing ion conduction

Inactive Publication Date: 2018-03-02
柔电(武汉)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a flexible all-solid-state battery and its preparation method, which aims to solve the problems of poor flexibility, poor rate performance and high-temperature performance of the existing all-solid-state batteries

Method used

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  • Flexible whole-solid-state battery and preparation method of same
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  • Flexible whole-solid-state battery and preparation method of same

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preparation example Construction

[0041] The present invention also provides a method for preparing a flexible all-solid-state battery, comprising the following steps:

[0042] (1) Mix and stir the positive electrode active material, conductive adhesive, binder, first solid electrolyte, first cellulose matrix and solvent to form a uniformly dispersed slurry, and pour the resulting slurry into a suction filter with filter paper In the device, it is filtered to form a film to prepare a flexible positive electrode sheet.

[0043] (2) Mix and stir the negative electrode active material, conductive adhesive, binder, first solid electrolyte, first cellulose matrix and solvent to form a uniformly dispersed slurry, and pour the resulting slurry into a suction filter with filter paper In the device, the film is formed by filtration to prepare a flexible negative electrode sheet.

[0044] (3) Fully mix and high-speed disperse the second solid electrolyte in the solvent, then add the second cellulose matrix that has bee...

Embodiment 1

[0058] (1) Put the active material graphite raw material, the conductive agent carbon nanotube, the solid electrolyte polyethylene oxide, and the nanocellulose matrix into the isopropanol solvent with a mass ratio of 87:3:5:5. Stir at high speed at room temperature for 15 minutes to obtain a viscous slurry, pour the resulting viscous slurry into a suction filter with filter paper, filter to form a film, and vacuum dry at 130°C for 8 hours to obtain a flexible negative electrode After the dried flexible negative electrode sheet was rolled on a roller press, a flexible negative electrode sheet with a thickness of 100 microns was obtained.

[0059] The flexible negative electrode sheet obtained in this embodiment has good flexibility and can be bent repeatedly without breaking. figure 1 It is the electron microscope picture of the flexible negative electrode sheet before and after rolling. It can be seen from the figure that the active material and the active material are surroun...

Embodiment 2

[0067] (1) The active material lithium cobalt oxide raw material, the conductive agent carbon nanotube, and the solid electrolyte Li 6.4 La 3 Zr 1.4 Ta 0.6 o 12 Put the three substances into the isopropanol solvent with a mass ratio of 92:3:5, stir at high speed for 10 minutes at room temperature to form a uniformly dispersed suspension, and add the fully dispersed cellulose base liquid to the suspension , the cellulose accounted for 8% of the entire pole piece, stirred again at high speed for 5 minutes to obtain a viscous slurry, poured the obtained viscous slurry into a suction filter device with filter paper, filtered to form a film, and heated at 120°C , dried in vacuum for 12 hours to prepare a flexible positive electrode sheet, and rolled the dried flexible positive electrode sheet on a roller press to obtain a flexible positive electrode sheet with a thickness of 110 microns.

[0068] The flexible positive electrode sheet obtained in this example has good flexibilit...

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Abstract

The invention provides a flexible whole-solid-state battery and a preparation method of same. The flexible whole-solid-state battery includes, in a successively stacked manner, a flexible positive plate, a solid state electrolyte membrane, and a flexible negative plate. Each of the flexible positive plate and the flexible negative plate includes a first cellulose substrate, an active substance, aconductive agent and a first solid electrolyte, the active substance and the conductive agent being dispersed in the first cellulose substrate. The solid state electrolyte membrane includes a second solid electrolyte and a second cellulose substrate. Metal compounds are deposited onto the surfaces of the flexible positive plate, the flexible negative plate and the solid state electrolyte membrane.By adding the cellulose substrates to the flexible positive plate, the flexible negative plate and the solid state electrolyte membrane, network total supporting effect is achieved. By adding the solid state electrolyte to the flexible positive plate and the flexible negative plate, ion conduction effect is enhanced; by depositing the metal compound, the battery is improved in rate capability andhigh-temperature performance.

Description

technical field [0001] The invention relates to the field of solid-state batteries, in particular to a flexible all-solid-state battery and a preparation method thereof. Background technique [0002] Lithium-ion batteries have been widely used due to their many important advantages such as high voltage and high capacity, long cycle life, high open circuit voltage, and no memory effect. However, the traditional liquid lithium-ion battery contains a large amount of organic electrolyte, which has the disadvantages of being volatile, flammable, and explosive, which will cause major safety hazards. Therefore, the development of all-solid-state batteries using solid-state electrolytes instead of electrolytes is the fundamental way to solve battery safety problems. Compared with liquid electrolyte batteries, all-solid-state batteries have greater room for development in terms of improving energy density, widening the working temperature range, and prolonging service life. Solid-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/0562H01M10/0565H01M2/16H01M50/44
CPCH01M10/0525H01M10/0562H01M10/0565H01M50/431H01M50/44Y02E60/10
Inventor 熊红波胡韬解明
Owner 柔电(武汉)科技有限公司
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