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A binder, its preparation method and a secondary battery containing the binder

A secondary battery and binder technology, applied in battery electrodes, circuits, organic chemistry, etc., can solve problems such as large swelling rebound, poor thermal stability, and potential safety hazards, and achieve high thermal stability, stable main chain structure, and improved Effect of Magnification Performance

Active Publication Date: 2018-09-18
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, PVDF swells and rebounds greatly in the electrolyte, has poor thermal stability, and is prone to explosion during overcharging and thermal shock, posing safety hazards

Method used

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  • A binder, its preparation method and a secondary battery containing the binder
  • A binder, its preparation method and a secondary battery containing the binder
  • A binder, its preparation method and a secondary battery containing the binder

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0052] The present application also relates to the preparation method of the adhesive, the preparation method of the structural unit shown in formula II at least includes the following steps:

[0053] (1) Preparation of substituted 5-alkenylthiazole iodides;

[0054]

[0055] (2) Using a lithium salt with a hydrophilic group and thiazole iodide to carry out a displacement reaction to prepare a compound shown in formula 3;

[0056]

[0057] (3) The compound shown in formula 3 is polymerized to obtain the structural unit shown in formula II:

[0058]

[0059] Among them, R 11 , R 12 each independently selected from substituted C 1-6 Alkyl, the substituent is halogen;

[0060] R 21 , R 22 independently selected from hydrogen atom, C 1-12 Alkyl, C 1-12 Alkoxy or C 1-12 Alkanoyloxy;

[0061] R 23 from C 1-12 alkyl;

[0062] R 23 selected from halogen, C 1-6 alkyl.

[0063] Among them, the compounds represented by raw materials 1-1, 1-2, and 1-3 in this synthe...

Embodiment 1～8

[0072] The binders of Examples 1 to 8 are composed of structural units shown in Formula II, and the specific selection of substituents in Examples 1 to 8 is shown in Table 1:

[0073]

[0074] Table 1:

[0075] Example

R 11

R 12

R 21

R 22

R 23

R 3

Example 1

-CF 3

-CF 3

-H

-CH 3

-CH 3

-H

Example 2

-CH 2 CF 3

-CH 2 CF 3

-H

-CH 3

-CH 3

-H

Example 3

-CH 2 Cl

-CH 2 Cl

-H

-CH 3

-C 2 h 5

-H

Example 4

-C 2 f 5

-C 2 f 5

-CH 3

-C 2 h 5

-C 2 h 5

-Cl

Example 5

--CHFCH 2 f

-CH 2 f

-CH 3

-C 3 h 7

-C 3 h 7

-Cl

Example 6

-CH 2 CH 2 Cl

-CH 2 CH 2 Cl

-CH 3

-H

-C 4 h 9

-CH 3

Example 7

--CHFCH 2 f

-CH 2 CH 2 f

-C 2 h 5

-H

-C 5 h 11

-CH 3

Example 8

-C 3 f ...

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PUM

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Abstract

The invention relates to the field of a lithium ion battery material, and specifically a binder and a preparation method therefor, and a secondary battery containing the binder. The binder contains an amphipathic structural unit, wherein the side chain of the amphipathic structural unit contains a substitutional thiazole group; and the thiazole group is connected with a hydrophilic group and an oleophilic group concurrently. According to the novel binder provided by the invention, the conductive thiazole group is introduced to the polymer molecular side chain, so that the rate capability of the battery can be improved; the oleophilic group and the hydrophilic group are introduced to the thiazole group ring concurrently to adjust the dissolving behaviors of the binder in different solvents, so that the binder can not be dissolved and swelled in an electrolyte with relatively weak polarity, and the binder can be effectively dissolved in a strong-polarity solvent NMP; and therefore, the preparation of a negative electrode-positive electrode paste can be promoted.

Description

technical field [0001] The present application relates to the field of lithium ion battery materials, in particular, to a binder, a preparation method thereof and a secondary battery containing the binder. Background technique [0002] Lithium-ion battery binders currently on the market are generally divided into oil-based solvent binders and water-based solvent binders. Among them, the oil-based binder is mainly polyvinylidene fluoride (PVDF). Since PVDF does not have the function of transporting electrons, its use in batteries will affect the capacity of lithium-ion batteries. Moreover, PVDF swells and rebounds greatly in the electrolyte, has poor thermal stability, and is prone to explosion during overcharging and thermal shock, posing safety hazards. [0003] In view of this, the present application is proposed. Contents of the invention [0004] The primary object of the invention of this application is to propose an adhesive. [0005] The second invention of the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D277/00
CPCH01M4/622Y02E60/10
Inventor 余林峰蒋治亿许金梅
Owner CONTEMPORARY AMPEREX TECH CO
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