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Polymer electrolyte and lithium ion battery containing polymer electrolyte

A polymer and electrolyte technology, applied in secondary batteries, secondary battery repair/maintenance, circuits, etc., can solve problems such as initiator side reactions, long production process, and poor uniformity of semi-solid electrolytes

Active Publication Date: 2020-05-12
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are problems such as poor uniformity and processing difficulties in semi-solid electrolytes.
[0003] In order to improve the safety performance of lithium-ion batteries, the Chinese invention patent application with application number 201810272566.8 discloses a method for preparing in-situ solid-state batteries, using electrolyte salts, organic solvents, acrylates and initiators as raw materials to prepare solid-state batteries in situ Battery, the patent can improve the interface contact between the electrolyte and the positive and negative electrodes, but the introduction of the initiator will produce side reactions during the charging and discharging process of the battery
The Chinese invention patent application with the application number 201810562363.2 discloses a method for preparing an all-solid-state battery. The patent uses inorganic lithium salts and carbonate oligomers to prepare an electrolyte, which is injected into the middle of the positive and negative electrodes and processed to form an all-solid-state battery. , but the patent has problems such as long production process in the process of forming the electrolyte into a solid electrolyte

Method used

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  • Polymer electrolyte and lithium ion battery containing polymer electrolyte
  • Polymer electrolyte and lithium ion battery containing polymer electrolyte
  • Polymer electrolyte and lithium ion battery containing polymer electrolyte

Examples

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Embodiment 1

[0056] In order to realize the preparation method of above-mentioned a kind of polymer electrolyte and the lithium-ion battery object containing this structure thereof, the present invention takes following technical solution:

[0057] S1: In parts by weight, 0.3 parts of di-3-methoxybutyl peroxydicarbonate, 0.4 parts of (S)-4-(methoxymethyl)-1,3-dioxolane- 2-keto, 0.2 parts of isobutylcarbonyl lactose anhydride, 0.7 parts of ethyl lactate carbonate, 0.1 parts of methyl 2-hydroxyphenylacetate, 0.3 parts of methyl hydroxytrimethyl acetate, 0.3 parts of methyl 3-hydroxyhexanoate, 0.5 parts of ethyl 3-hydroxycaproate, 0.2 parts of 2-carboxyphenylboronic acid pinacol ester, 0.5 parts of 4,5-dicarboxy-pentadecanolactone, 0.3 parts of methyl 4-carboxyphenylacetate, 0.2 parts of 1 , Dissolve 0.01 part of polymethyl methacrylate, polymethyl acrylate, polyboric acid ester and polycarbonate (polymethyl methacrylate, polymethyl acrylate, polyboric acid in 1-cyclopropyl dicarboxylic acid ...

Embodiment 2

[0061] This example also discloses a preparation method of a lithium-ion battery. For the specific method, refer to S1-S3 in Example 1. The only difference from Example 1 is that in the process of S1-S3, organic solvents, functional polymers, lithium salts, functional The proportions and types of additives and functional reactants are different. Please refer to Table 1, Table 2 and Table 3 below for specific information.

Embodiment 3

[0063] This example also discloses a preparation method of a lithium-ion battery. For the specific method, refer to S1-S3 in Example 1. The only difference from Example 1 is that in the process of S1-S3, organic solvents, functional polymers, lithium salts, functional The proportions and types of additives and functional reactants are different. Please refer to Table 1, Table 2 and Table 3 below for specific information.

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Abstract

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a polymer electrolyte and a lithium ion battery containing the polymer electrolyte. The preparation method of the polymer electrolyte comprises the following steps: (1) dissolving 5-90 parts by weight of an organic solvent into 0.01-27 parts by weight of a functional polymer to prepare a uniformly mixed system A; (2) uniformly mixing the system A, a lithium salt, a functional additive and a functional reactant to obtain a mixed solution; and (3) carrying out in-situ polymerization on the mixed solution to obtain the polymer electrolyte. The polymer electrolyte prepared by the invention can effectively improve the safety of the lithium ion battery, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, in particular to a polymer electrolyte and a lithium ion battery containing the polymer electrolyte. Background technique [0002] Lithium-ion batteries have been widely used in digital products, power and energy storage and other fields. At present, commercial lithium-ion batteries mainly use liquid electrolytes, which are prone to thermal runaway during use, resulting in safety problems. Solid-state lithium-ion batteries use solid electrolytes instead of liquid electrolytes, which can fundamentally solve the safety problem of lithium-ion batteries. At present, the solid-state electrolytes of solid-state lithium-ion batteries mainly include polymer electrolytes, sulfide electrolytes, oxide electrolytes, and hydride electrolytes. At present, polymer electrolytes mainly have disadvantages such as low room temperature conductivity and poor oxidation resistance. Sulfide electrolytes a...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/0525H01M10/42
CPCH01M10/0525H01M10/0565H01M10/4235Y02E60/10
Inventor 唐伟超李素丽赵伟袁号李俊义徐延铭
Owner ZHUHAI COSMX BATTERY CO LTD
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