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Lithium battery solid electrolyte, preparation method thereof and lithium battery structure

A solid electrolyte and lithium battery technology, which is applied in the direction of final product manufacturing, sustainable manufacturing/processing, coating, etc., can solve the problems of poor transmission of conductive particles, poor conductivity, etc., achieve good environmental performance, increase service life, and improve The effect of volume expansion

Active Publication Date: 2022-05-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problems of poor transportability and poor conductive effect of solid electrolyte conductive particles in the prior art, embodiments of the present invention provide a lithium battery solid electrolyte, a preparation method thereof, and a lithium battery structure

Method used

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  • Lithium battery solid electrolyte, preparation method thereof and lithium battery structure
  • Lithium battery solid electrolyte, preparation method thereof and lithium battery structure
  • Lithium battery solid electrolyte, preparation method thereof and lithium battery structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] This embodiment provides a solid electrolyte for a lithium battery, including a lithium salt conductive agent and a bio-based polyester base material, the lithium salt conductive agent is a lithium ion compound for providing conductive lithium ions, and the bio-based polyester base material is The lithium salt conductive agent is dispersed and used to conduct the lithium ions, and the general formula of the bio-based polyester base material at least includes the following structure:

[0050]

[0051] "The general formula of the bio-based polyester base material includes at least the general formula of the structure shown below: "Structure shown" means that the bio-based polyester base material contains at least basic structural units The basic structural unit of the bio-based polyester base material can only contain Other basic structural units can also be included, and all the basic structural units of the bio-based polyester base material are formed by random...

Embodiment 2

[0075]This embodiment provides a method for preparing a bio-based polyester base material, which includes: polymerizing monomer a and monomer b to obtain a bio-based polyester base material.

[0076] in:

[0077] Monomer a includes at least one of them;

[0078] Monomer b includes a combination of HOOC-Z-COOH and HO-Q-OH, and at least one of HOOC-X-OH;

[0079] X is an open carbon chain;

[0080] Z is a bond linker or an open carbon chain;

[0081] Q is an open carbon chain;

[0082] The sum of the number of branches of X, Z and Q is less than or equal to 15% of the sum of the number of moles of monomer a and monomer b.

[0083] It should be noted that X is an open carbon chain, Z is a bond linker or an open carbon chain, and Q is an open carbon chain. "Open carbon chain" includes open carbon chains with branches, open carbon chains without branches, and -CH 2 -. For example: X can be -CH 2 -,can also be -CH 2 CH 2 - etc., and not limited to this, Z and Q are t...

Synthetic example 1

[0098] Synthesis Example 1 corresponds to the synthesis of copolyester PBPSSI.

[0099] The monomer a and the monomer b were reacted at 130°C for 3h under normal pressure;

[0100] Then react at 180°C for 3h under normal pressure;

[0101] Finally, the reaction was carried out at 220 °C for 10 h in a vacuum environment;

[0102] The reactant was dissolved in chloroform, and cold methanol (0° C.) was added, and the precipitate was collected and washed to obtain a bio-based polyester base material.

[0103] Wherein, the monomer a is HOOC-Z-COOH is itaconic acid, and the monomer b is the combination of HOOC-Z-COOH and HO-Q-OH. HOOC-Z-COOH includes sebacic acid and succinic acid, and HO-Q-OH is butanediol and propylene glycol. That is, Z contains both -(CH 2 ) 8 -and There are two forms of existence, and Q is -CH 2 CH 2 CH 2 CH 2 - This one form, the form of existence of Z It has a carbon-carbon double bond branch.

[0104] The molar ratio of monomer a (the percentag...

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Abstract

The invention relates to the technical field of lithium batteries, in particular to a lithium battery solid electrolyte, a preparation method thereof and a lithium battery structure. The lithium battery solid electrolyte comprises a lithium salt conductive agent and a bio-based polyester substrate material, the lithium salt conductive agent is a lithium ion compound and used for providing conductive lithium ions, the bio-based polyester substrate material is used for dispersing the lithium salt conductive agent and conducting the lithium ions, and the bio-based polyester substrate material belongs to linear molecules and is an elastomer. According to the present invention, the lithium-ion battery positive electrode material is the amorphous amorphous structure, has certain viscosity, can disperse and stably bond lithium ions of the lithium salt, and has the small transmission limiting effect on the conductive lithium ions in the lithium salt due to the amorphous amorphous structure so as to improve the conductivity of the lithium-ion battery positive electrode material; the damage self-repairing capability is realized, and the service life of the lithium battery structure can be well prolonged; the prepared monomer structure is prepared from renewable biomass, so that the prepared monomer structure has biodegradability and good environmental protection performance.

Description

【Technical field】 [0001] The invention relates to the technical field of lithium batteries, in particular, to a lithium battery solid electrolyte, a preparation method thereof, and a lithium battery structure. 【Background technique】 [0002] With the commercialization of lithium batteries, lithium batteries have been widely used in 3C, electric vehicles and energy storage fields, especially solid-state lithium batteries. As an important part of lithium battery, the solid electrolyte structure of lithium battery directly affects the conductivity and electrochemical window of lithium battery. When a lithium battery is used, in the process of repeated charge and discharge, the transport performance of the charged particles in the solid electrolyte will directly affect the conductivity of the lithium battery, and the existing solid electrolyte materials usually include the preparation of shaped body materials that are easy to crystallize. obtained, resulting in poor transport p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/60C08G63/672C08G63/78C09D167/02
CPCC08G63/60C08G63/672C08G63/78C09D167/02Y02P70/50Y02E60/10
Inventor 彭晓丽唐晨霞向勇胡潇然
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA