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Double-polymer gel material as well as preparation method and application thereof

A gel material and dual polymer technology, applied in the direction of unsaturated alcohol copolymer adhesives, adhesives, conductive adhesives, etc., can solve the problems of poor mechanical properties and weak interaction of active materials, and achieve increased mutual The effect of force, enhanced interaction force, and improved distribution uniformity

Active Publication Date: 2021-06-11
NANJING NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: the present invention aims at the problems of poor mechanical properties and weak interaction with active materials in the single conductive polymer gel in the prior art, and provides a dual polymer gel material. The present invention also provides the above-mentioned dual Preparation method of polymer gel material and its application as a conductive binder in the preparation of negative electrode materials for lithium batteries

Method used

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  • Double-polymer gel material as well as preparation method and application thereof
  • Double-polymer gel material as well as preparation method and application thereof
  • Double-polymer gel material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of double polymer gel material of the present invention, comprises the steps:

[0029] Step 1, dissolving pyrrole, copper phthalocyanine tetrasulfonic acid tetrasodium salt and polyvinyl alcohol into water to form a uniform mixed solution, in the mixed solution, the molar ratio of pyrrole and copper phthalocyanine tetrasulfonic acid tetrasodium salt is 719 : 1, the adding mass ratio of pyrrole and polyvinyl alcohol is 1: 1.4;

[0030] Step 2, adding glutaraldehyde and ammonium persulfate to the mixed solution of step 1, in the mixed solution, the mass ratio of polyvinyl alcohol to glutaraldehyde is 1:1.3, and the molar ratio of pyrrole and ammonium persulfate is 1 : 1.4, stand until the system is in a gel state to obtain a double polymer gel material.

[0031] From the transmission electron microscope image ( figure 1 ) and structural diagram ( figure 2 ) It can be seen that the double polymer gel material obtained in Example 1 is a double pol...

Embodiment 2

[0033] The preparation method of double polymer gel material of the present invention, comprises the steps:

[0034] Step 1, dissolve pyrrole, phytic acid and polyvinyl alcohol into water to form a uniform mixed solution. In the mixed solution, the molar ratio of pyrrole and phytic acid is 1:1, and the mass ratio of pyrrole to polyvinyl alcohol is 1 :5;

[0035] Step 2, adding borax and ammonium persulfate to the mixed solution of step 1, in the mixed solution, the mass ratio of polyvinyl alcohol and borax is 10:1, and the molar ratio of pyrrole and ammonium persulfate is 1:1, stirring Until the system is in a gel state, a double polymer gel material is obtained.

[0036] The dual-polymer gel material obtained in Example 2 is also a dual-polymer gel material interwoven with the conductive polymer gel network and the bonding polymer gel network in the three-dimensional direction, which is the same as that obtained in Example 1. The material structure is similar.

Embodiment 3

[0038] The preparation method of double polymer gel material of the present invention, comprises the steps:

[0039] Step 1, dissolving pyrrole, copper phthalocyanine tetrasulfonic acid tetrasodium salt and polyvinyl alcohol into water to form a uniform mixed solution, in the mixed solution, the molar ratio of pyrrole and copper phthalocyanine tetrasulfonic acid tetrasodium salt is 200 :1, the adding mass ratio of pyrrole and polyvinyl alcohol is 5:1;

[0040] Step 2, adding trimethylol melamine and potassium ferricyanide to the mixed solution of step 1, in the mixed solution, the mass ratio of polyvinyl alcohol to trimethylol melamine is 4:1, pyrrole and potassium ferricyanide The molar ratio of adding is 1:2.5, and the system is left to stand until the system is in a gel state to obtain a double polymer gel material.

[0041] The dual polymer gel material obtained in Example 3 is also a dual polymer gel material interwoven with the conductive polymer gel network and the bon...

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Abstract

The invention discloses a double-polymer gel material which is formed by interpenetrating and staggering conductive polymer gel networks and bonding polymer gel networks. The invention also discloses a preparation method of the double-polymer gel material and application of the double-polymer gel material as a conductive binder in preparation of a lithium battery negative electrode material. The prepared double-polymer gel material can be used as a conductive adhesive for electrochemical energy storage, compared with single conductive polymer gel, the elasticity of the polymer gel material is greatly improved by adding the flexible adhesive polymer gel into the conductive polymer gel; the polymer gel materials formed by interpenetrating and staggering the conductive polymer gel networks and the bonding polymer gel networks are connected through hydrogen bonds, covalent bonding or ionic bonding, so that the interaction force between the polymer gel networks is improved, and the interaction force between the polymer gel networks and the active material is also enhanced, and further, the structural stability of the silicon-coated composite gel material is enhanced; and the two gel networks are generated at the same time, so that the distribution uniformity of the double-polymer gel networks can be improved, and the mutual interaction force can be further increased.

Description

technical field [0001] The invention relates to a double polymer gel material, and also relates to a preparation method of the above double polymer gel material and its application as a conductive binder in the preparation of negative electrode materials for lithium batteries. Background technique [0002] In electrochemical energy storage, the active material needs to be dispersed into a solvent together with a conductive agent and a binder to form a slurry, and then further coated on a current collector. In the traditional process, carbon nanomaterials with high conductivity are generally used as conductive agents, such as zero-dimensional carbon black particles, one-dimensional carbon nanotubes and two-dimensional graphene materials. These carbon conductive agents are mutually dissociated in the electrode and cannot It provides a continuous electron transport channel and is easy to lose electrical contact with the active material during the continuous charge and discharge...

Claims

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Application Information

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IPC IPC(8): C09J9/02C09J129/04C09J179/04C09J105/08C09J179/02C09J133/00C09J11/04C09J11/06H01M4/62H01M10/0525
CPCC09J9/02C09J129/04C09J179/04C09J105/08C09J179/02C09J133/00C09J11/04C09J11/06H01M4/622H01M10/0525H01M2004/027C08L2205/04C08L2203/20C08L2201/04C08K2003/387C08L79/04C08K5/0091C08K5/07C08K5/521C08K3/38C08L29/04C08K5/34922C08L79/02C08L5/08C08L33/00Y02E60/10
Inventor 吴平夏婷婷王岑李喆周益明
Owner NANJING NORMAL UNIVERSITY