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Solid-state battery and preparation method thereof

A solid-state battery and preparation process technology, which is applied in the manufacture of electrolyte batteries, secondary batteries, battery electrodes, etc., and can solve problems such as poor stability of pole pieces, large internal resistance of batteries, limited manufacturing temperature and time, etc.

Inactive Publication Date: 2021-09-14
EVERGRANDE NEW ENERGY TECH SHENZHEN CO LTD
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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 method for preparing a solid-state battery, which aims to solve the poor stability of the pole piece of the existing solid-state battery to a certain extent, the limited manufacturing process such as temperature and time, and the large internal resistance of the battery and poor electrochemical performance. and other technical issues

Method used

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  • Solid-state battery and preparation method thereof
  • Solid-state battery and preparation method thereof
  • Solid-state battery and preparation method thereof

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preparation example Construction

[0050] An embodiment of the present invention provides a method for preparing a solid-state battery. The preparation process of the solid-state battery is carried out under anhydrous and oxygen-free conditions, including the following steps:

[0051] S10. obtaining a porous metal material;

[0052] S20. Mixing the metal nanomaterial, the positive electrode powder and the first electrolyte powder to obtain a positive electrode mixture;

[0053] S30. Filling the positive electrode mixture into the structure of the porous metal material, and performing the first compaction treatment to obtain a positive electrode compacted layer;

[0054] S40. Deposit the second electrolyte powder on one side of the positive electrode compacted layer, and perform a second compaction treatment to obtain a composite compacted layer of the positive electrode compacted layer and the electrolyte compacted layer;

[0055] S50. Electromagnetic thermal sintering is performed on the composite compacted l...

Embodiment 1

[0106] A solid state battery comprising the steps of:

[0107] ① Operate under an inert atmosphere environment, mix ferrous sulfide FeS cathode powder, Li 7 P 3 S 11 The sulfide electrolyte and metal iron nano powder conductive agent are ball milled to obtain the mixture;

[0108] ②Fill the mixture in step ① into metal foam nickel with a thickness of 200 microns, as attached figure 2 It can be seen from the electron microscope image that the thickness of metal foamed nickel is 100 microns to 600 microns, and the opening diameter is 0.25 mm, and the vibration makes the pole pieces packed tightly;

[0109] ③ Place the metal foam nickel mesh in a metal module of predetermined size and shape, fill the positive electrode powder into the metal foam nickel mesh supported by the bottom metal plane, put it into a hydraulic mold, and apply pressure to make it a whole The thickness of the pole piece without falling powder is reduced, and the original 150 micron thick foam network is...

Embodiment 2

[0115] A solid state battery comprising the steps of:

[0116] ① Operate under an inert atmosphere environment, according to the ratio of 65%: 30%: 5% FeS 2 Cathode powder, Li 7 P 3 S 11 Sulfide electrolyte, metal nickel nano powder conductive agent ball milling to obtain the mixture;

[0117] ②Fill the mixture in step ① into metal foam nickel with a thickness of 200 microns, the thickness of the metal foam nickel is 100 microns to 600 microns, and the opening aperture is 0.25 mm, and the vibration makes the pole pieces packed tightly;

[0118] ③ Place the metal foam nickel mesh in a metal module of predetermined size and shape, fill the positive electrode powder into the metal foam nickel mesh supported by the bottom metal plane, put it into a hydraulic mold, and apply pressure to make it a whole The thickness of the pole piece without powder falling is reduced, and the original 200 micron thick foam network is reduced to 160 micron.

[0119] ④ Add electrolyte powder and...

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Abstract

The invention belongs to the technical field of batteries, and particularly relates to a preparation method of a solid-state battery. The preparation process of the solid-state battery is carried out under anhydrous and anaerobic conditions. The preparation method comprises the following steps: obtaining a porous metal material; mixing the metal nano material, positive electrode powder and first electrolyte powder to obtain a positive electrode mixture; filling the structure of the porous metal material with the positive electrode mixed material, and carrying out first compaction treatment to obtain a positive electrode compacted layer; depositing second electrolyte powder on the surface of one side of the positive electrode compaction layer, and carrying out second compaction treatment to obtain a composite compaction layer of the positive electrode compaction layer and the electrolyte compaction layer; and under the water-free and oxygen-free condition, carrying out electromagnetic thermal sintering treatment on the composite compaction layer to obtain a composite layer of the positive plate and the electrolyte layer. The preparation method of the solid-state battery is short in sintering time and high in efficiency, and the prepared solid-state battery is low in resistance, high in conductivity and excellent in comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of batteries, in particular to a solid-state battery and a preparation method thereof. Background technique [0002] In recent years, with the widespread application of lithium-ion secondary batteries in consumer electronics communication equipment, electric vehicles, smart grids and other fields. While improving the energy density of lithium-ion secondary batteries, higher and higher requirements are put forward for the safety of batteries. At present, due to the widespread use of electrolytes containing flammable organic solvents in lithium-ion batteries, organic electrolytes have safety issues such as flammability, corrosion, and poor thermal stability, which limits the development of traditional lithium-ion batteries. In practical applications, it is often necessary to install safety devices for suppressing temperature rise during short-circuit, and materials, structures, and systems for ensuring safety...

Claims

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Application Information

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IPC IPC(8): H01M4/66H01M4/80H01M4/62H01M10/0525H01M10/058B82Y30/00B82Y40/00
CPCH01M4/661H01M4/80H01M4/626H01M4/628H01M10/058H01M10/0525B82Y30/00B82Y40/00Y04S30/12Y02T90/167Y02P70/50Y02E60/10
Inventor 江辉张勍胡春林其他发明人请求不公开姓名
Owner EVERGRANDE NEW ENERGY TECH SHENZHEN CO LTD
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