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Solid electrolyte membrane and preparation method and secondary cell and preparation method thereof

A solid electrolyte membrane and solid electrolyte technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, secondary batteries, etc., can solve the problems of solid electrolyte membranes with many pores and battery electrical performance degradation, and achieve high density and grain boundaries. Less, lower cost effect

Active Publication Date: 2018-07-27
THE NORTHERN RES INST OF NJUST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The first object of the present invention is to provide a preparation method of a solid electrolyte, and the second object of the present invention is to provide a solid electrolyte obtained by the preparation method, so as to alleviate the problems caused by adding a binder when preparing a solid electrolyte using the prior art. The technical problems of the solid electrolyte membrane with many pores and the decline in the electrical performance of the battery

Method used

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preparation example Construction

[0031] The preparation method provided by the invention can realize the preparation of a solid electrolyte membrane with a thickness of 20-100 microns within 4-10 minutes, and is a new method and process suitable for industrial production that is simple, efficient, low-cost and suitable.

[0032] It should be noted that the solid electrolyte membrane obtained by using the preparation method provided by the present invention has no organic filling, so the formed solid electrolyte membrane has high density and relatively few grain boundaries, which is more suitable for the application of solid-state batteries.

[0033] In some embodiments of the present invention, the solid electrolyte material is selected from Li 3a La (2 / 3)-a TiO 3 (0.043+a x a Y 1-a o 4(X=Si, Sc, Ge, Ti; Y=P, As, V, Cr; 01+a Al a Ti b Ge 2-a-b (PO 4 ) 3 (02 (PO 4 ) 3 , Li 5 La 3 m 2 o 12 (M=Ta, Nb), Li 3 N-LiX (X=Cl, Br, I), Li 9-na m a N 2 Cl 3 (M=Na, K, Rb, Cs, Mg, Al; 03 N-MI (M=Li, Na,...

Embodiment 1

[0063] This embodiment is a method for preparing a solid electrolyte membrane, which specifically includes the following steps:

[0064] Step a) preparation of slurry: using water as a volatile solvent, micron or nanoscale Li 3a La (2 / 3)-a TiO 3 (0.04<a<0.14) is a solid electrolyte powder, the solid electrolyte powder is dissolved in a solvent, and the electrolyte slurry is made through sufficient stirring and grinding;

[0065] Step b) coating and drying to prepare a dry powder layer of the solid electrolyte substance: coating the electrolyte slurry obtained in step a) on the substrate by a scraping method, and controlling the thickness of the scraping to about 10 microns;

[0066] After scraping the slurry, place the substrate coated with the electrolyte slurry in an oven at 120°C to dry to form a dispersed solid electrolyte dry powder layer;

[0067] Step c) Preparation of solid electrolyte membrane by laser heating: place the dry powder layer of solid electrolyte materi...

Embodiment 2

[0070] This embodiment is a method for preparing a solid electrolyte membrane. Compared with the embodiment, the difference is that the power of the laser is different. In this embodiment, the power of the laser is 6W. Others are the same as the embodiment 1.

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Abstract

The invention provides a solid electrolyte membrane and a preparation method and a secondary cell and a preparation method thereof, which relate to the technical field of the secondary cell. The preparation method of the solid electrolyte membrane comprises the following steps: laser is used for heating a dry powder layer of a solid electrolyte substance, after the dry powder layer of the solid electrolyte substance is fusion and solidified, the solid electrolyte membrane is obtained. The method can alleviate the technical problem that a binder is added while the solid electrolyte is prepared,the apertures are multiple, and the electrical property of the cell is decreased in the prior art, and a purpose of increasing the electricity performance of the cell can be achieved.

Description

technical field [0001] The invention relates to the technical field of secondary batteries, in particular to a solid electrolyte membrane and a preparation method thereof, a secondary battery and a preparation method thereof. Background technique [0002] Lithium-ion batteries have many advantages such as high discharge voltage, high energy density, high power density, long cycle life and no memory effect. They are used in consumer electronics, power tools, medical electronics, electric vehicles, rail transit, aerospace, large-scale renewable It has a wide range of applications in areas such as energy access, power grid peak regulation and frequency regulation, and distributed energy storage. However, currently commercial lithium batteries use organic liquid electrolytes, which are flammable and explosive, which greatly hinders the popularization and application of lithium batteries. [0003] With the development of solid electrolyte materials, the research and development ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/0525H01M10/058
CPCH01M10/0525H01M10/0562H01M10/058H01M2300/0071Y02E60/10Y02P70/50
Inventor 夏晖徐璟孙硕昝峰夏求应岳继礼
Owner THE NORTHERN RES INST OF NJUST
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