Conductive polymer hydrogel as well as preparation method and application thereof

A conductive polymer and hydrogel technology, applied in circuits, electrical components, secondary batteries, etc., can solve the problems of inability to guarantee the electrical properties of polyaniline gel, and achieve improved cycle stability, simple preparation method, The effect of improving self-discharge performance

Active Publication Date: 2018-06-01
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the need to introduce small-molecule inorganic acid as doping acid in the post-polymerization process of polyaniline, there is no guarantee that the doping acid will be lost during subsequent use and affect the electrical properties of polyaniline gel.

Method used

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  • Conductive polymer hydrogel as well as preparation method and application thereof
  • Conductive polymer hydrogel as well as preparation method and application thereof

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preparation example Construction

[0031] Electrode preparation: The positive electrode sheet was prepared on the surface of the aluminum foil by using water as a solvent coating method. The polyacrylic acid / polyaniline gel active material: conductive acetylene black is dispersed in a mixed solvent of water and alcohol, and ground evenly to form a viscous coating on a clean aluminum foil, and then dried in a vacuum oven.

[0032] Further, the mass composition of the electrode material is: active material polymer gel:conductive agent acetylene black=2~8:2~5, preferably 5~7:3~4.

[0033] Battery assembly: adopt conventional battery assembly process. Specifically, the CR2032 battery device system was used to test the electrochemical performance and charge and discharge performance of the battery. Lithium is used as the negative electrode and reference electrode, and the electrolyte is 1 M LiPF 6 EC:DMC =1:1 (v / v) solution, the diaphragm is a polypropylene microporous membrane (Celgard 2300) used in industrializa...

Embodiment 1

[0036] Preparation of polyacrylic acid / polyaniline conductive polymer gel

[0037] At room temperature, dissolve 15 g of acrylic acid monomer, 0.4656 g of aniline monomer, and 0.0308 g of cross-linking agent in 50 ml of distilled water to form aniline acrylate (such as figure 1 ) mixed solution. The mixture was stirred evenly and placed at 50 o Heat and stir in a C water bath, add dropwise 10 ml of a solution containing 0.5705 g of initiator ammonium persulfate, and react with stirring for 1 h under the protection of inert argon. The reaction polymer gel is precipitated with a large amount of acetone, filtered, washed and dried to obtain a polyacrylic acid / polyaniline hydrogel product.

Embodiment 2

[0039] Electrode preparation and battery assembly

[0040] (1) Preparation of electrodes. Electrode sheets were prepared on the surface of aluminum foil by coating method. Dissolve active material polymer powder: conductive agent acetylene black = mass ratio 7:3 in water to form a viscous liquid. Then the liquid was coated on a clean aluminum foil with a 90 nm spatula, and then at 60 o C and dried under vacuum until the quality of the film remained unchanged.

[0041] (2) Assembly of the battery. In this paper, the CR2032 battery device system is mainly used to test the electrochemical performance and charge and discharge performance of the battery. Lithium is used as the negative electrode and reference electrode, the electrolyte is 1 M LiPF6 EC:DMC =1:1 (v / v) solution, the diaphragm is industrially used polypropylene microporous membrane (Celgard 2300), the electrode prepared before As the positive electrode, a CR2032 simulated half-cell was assembled in an argon atmosp...

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Abstract

The invention provides conductive polymer hydrogel as well as a preparation method and application thereof and relates to hydrogel as well as a preparation method and the application thereof. The preparation method comprises the following steps: dissolving an acrylic monomer and an aniline monomer in water or a water mixed solvent, standing and fully stirring; then weighing an initiating agent andpreparing an aqueous solution; slowly dropwise adding the prepared aqueous solution in a co-solution of the acrylic monomer and the aniline monomer, controlling the reaction temperature and performing co-polymerization reaction for 0.5-5 hours in an inert gas protection environment to obtain the polyacrylic acid-doped polyaniline-stabilized polyaniline conductive polymer gel synthesized by a one-step method; then adding a precipitating agent for precipitation, filtering, washing and drying to obtain a sample. The conductive polymer hydrogel provided by the invention is used as a cathode material to prepare a lithium battery and has good charge and discharge performances, cyclic stability and capacity retention ratio as the lithium ion battery cathode material.

Description

technical field [0001] The invention relates to a hydrogel and its preparation method and application, in particular to a conductive polymer hydrogel and its preparation method and application. Background technique [0002] Superabsorbent polymer is a new type of functional polymer material with moderate crosslinking and three-dimensional network structure, which can absorb water dozens or even thousands of times its own weight, and the absorbed water will not overflow even under pressure . Thirty years ago, superabsorbent polymers were first used in agriculture and health care, and gradually expanded to other fields that require better water absorption and water retention. In recent years, researchers on superabsorbent polymers have mainly developed their new uses, such as: conductive materials, biomaterials, sensors, drug release materials, and wave-absorbing materials. At present, it has become a research hotspot to prepare multifunctional superabsorbent polymers by mod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/60H01M10/0525C08J3/075C08L33/02C08L79/02C08F120/06C08G73/02
CPCC08F120/06C08G73/0266C08J3/075C08J2333/02C08J2479/02H01M4/362H01M4/602H01M10/0525Y02E60/10
Inventor 苏畅徐立环屈慧珠孙悦杨智俊郭鹏举马娇娇
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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