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A preparation method and application of functionalized graphene quantum dot modified gel binder

A quantum dot and binder technology, which is applied in the field of functionalized graphene quantum dot modified gel binder and its preparation, can solve the problem of open circuit of active material conductive agent, loss of charge transmission path, and binder bonding performance decrease and other problems, to achieve the effect of improving the comprehensive electrochemical performance, improving the electrical performance and mechanical performance

Active Publication Date: 2021-02-02
SPECIAL EQUIP SAFETY SUPERVISION INSPECTION INST OF JIANGSU PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Regardless of oil-based or water-based binders, most of the current binders tend to have poor conductivity, and conductive agents still need to be added during use to achieve charge transfer inside the electrode, and these charge transfer paths will be affected by the electrode charge-discharge cycle process. The volume shrinkage of the active material in the medium and the displacement of the conductive agent cause an open circuit, resulting in the loss of the charge transfer path; at the same time, it will also cause a decrease in the bonding performance of the binder.
The patent with the publication number CN108565406A adds nano-silicon to the dopamine hydrochloride solution to form a polydopamine coating on the silicon surface; at the same time, prepares graphene quantum dots by one-step solvothermal method and dopes them into the sodium alginate binder , the conductivity of the prepared composite electrode material is improved compared with that of pure silicon electrodes, but it is not feasible to greatly improve the conductivity of composite electrodes only by relying on the conductivity of graphene quantum dots. Binders have become a new trend in the development of binders with functional properties such as electrical conductivity

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  • A preparation method and application of functionalized graphene quantum dot modified gel binder

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Embodiment 1

[0034] The present embodiment provides a kind of preparation method of functionalized graphene quantum dot modified gel binder, comprising the following steps:

[0035] 1) Preparation of functionalized graphene quantum dots: Dissolve 1g of citric acid and 0.5g of N,N-methylenebisacrylamide in 40ml of water, transfer to a reactor for pyrolysis after dissolution, the pyrolysis temperature is 300°C, The pyrolysis time is 30 minutes. After the reaction is completed, cool to room temperature, redissolve the slurry in deionized water for dialysis, and use a dialysis bag with a molecular weight cut-off of 3500 for dialysis purification, and finally obtain functionalized graphene quantum dots;

[0036] 2) Preparation of functionalized graphene quantum dots modified ion-conductive gel binder: 0.2g functionalized graphene quantum dots and 2g acrylic acid monomer were uniformly dispersed in water; under nitrogen protection, the mixed solution system was placed in Stir continuously in a w...

Embodiment 2

[0039] The present embodiment provides a kind of preparation method of functionalized graphene quantum dot modified gel binder, comprising the following steps:

[0040] 1) Preparation of functionalized graphene quantum dots: 10g of citric acid and 1g of diacetone acrylamide were dissolved in 100ml of water, and then transferred into a reactor for pyrolysis. The high temperature pyrolysis temperature was 250°C and the pyrolysis time was 24min. After the reaction is completed, cool to room temperature, redissolve the slurry in deionized water for dialysis, and use a dialysis bag with a molecular weight cut-off of 2000 for dialysis purification, and finally obtain functionalized graphene quantum dots;

[0041] 2) Preparation of functionalized graphene quantum dots modified ion-conducting gel binder: 2g of functionalized graphene quantum dots and 2g of acrylic acid monomer were uniformly dispersed in water; under the protection of nitrogen, the mixed solution system was placed at 8...

Embodiment 3

[0044] The present embodiment provides a functionalized graphene quantum dot modified gel binder and a preparation method thereof, and the preparation method of the functionalized graphene quantum dot modified gel binder comprises the following steps:

[0045] 1) Preparation of functionalized graphene quantum dots: Dissolve 5g of citric acid and 1g of butoxyacrylamide in 10ml of water, transfer them into a reaction kettle for pyrolysis, the high temperature pyrolysis temperature is 150°C, and the pyrolysis time is 72h. Cool to room temperature after completion, redissolve the slurry in deionized water for dialysis, use a dialysis bag with a molecular weight cut-off of 500 for dialysis purification, and finally obtain functionalized graphene quantum dots;

[0046] 2) Preparation of functionalized graphene quantum dots modified ion-conducting gel binder: 1g of functionalized graphene quantum dots and 50g of acrylic acid monomer were uniformly dispersed in water; under the protect...

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Abstract

The invention provides a preparation method and application of a functionalized-graphene quantum dot-modified gel binder. The preparation method comprises the following steps: (1) preparation of functionalized graphene quantum dots, (2) preparation of the functionalized-graphene quantum dot-modified ion-conductive gel binder, and (3) preparation of a functionalized-graphene quantum dot-modified ion / electron-double conduction gel binder. When the prepared functionalized gel binder is applied to electrodes, not only can rapid transmission of ions and electrons in the electrodes be achieved, butalso the structural stability of the electrodes can be ensured, so that development needs of high-performance energy storage components are met.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to a functionalized graphene quantum dot modified gel adhesive and a preparation method and application thereof. Background technique [0002] Adhesives, also known as adhesives, adhesives or adhesives, etc., play a role in connecting the active material and the current collector foil, between the active material and the active material, and between the active material and the conductive agent in the electrode of the energy storage device. The role of bonding between the electrodes is not much, but it is the main source of the mechanical properties of the entire electrode, which has an important impact on the production process of the electrode and the electrochemical performance of the electrode. It can be said that the choice of the binder has a great impact on lithium ion batteries, The quality and performance impact of energy storage components such as supercapacitors is critical. [0...

Claims

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Application Information

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IPC IPC(8): C09J133/02C09J11/04H01G11/48H01M4/62
CPCC09J11/04C09J133/02H01G11/48H01M4/622C08K9/04C08K3/042Y02E60/10
Inventor 杨永强王勤生刘峥王群程小豹谢雪朱志鑫赵卫芳
Owner SPECIAL EQUIP SAFETY SUPERVISION INSPECTION INST OF JIANGSU PROVINCE
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