Preparation method and application of polypyrrole/graphene/bacterial cellulose conducting film material

A bacterial cellulose and graphene technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problem of conductive film materials not having stability, cycle performance and mechanical properties, corrosion of conductive film materials themselves and instruments and other problems, to achieve the effect of good biodegradability, high crystallinity and high mechanical strength

Active Publication Date: 2016-05-25
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem that the conductive film material prepared by the existing method does not have good stability, cycle performance and mechanical properties, and the electrolyte used as an electrode will corrode the conductive film material itself and the instrument, and provides a polymer Preparation method and application of pyrrole / graphene / bacterial cellulose conductive film material

Method used

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  • Preparation method and application of polypyrrole/graphene/bacterial cellulose conducting film material
  • Preparation method and application of polypyrrole/graphene/bacterial cellulose conducting film material
  • Preparation method and application of polypyrrole/graphene/bacterial cellulose conducting film material

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specific Embodiment approach 1

[0024] Specific embodiment one: the preparation method of a kind of polypyrrole / graphene / bacterial cellulose conductive membrane material of this embodiment is carried out according to the following steps:

[0025] 1. Soak the bacterial cellulose in deionized water and ultrasonically wash it, then evenly disperse it in deionized water, and then transfer it to a homogenizer for high-speed stirring to obtain a bacterial cellulose slurry; disperse graphene and surfactants ultrasonically in In deionized water, a graphene dispersion is obtained; the graphene dispersion is added to the bacterial cellulose slurry, and stirred while adding, to obtain a mixed solution A;

[0026] 2. Disperse the pyrrole monomer in deionized water, then add the mixed solution A, and stir while adding, to obtain the mixed solution B;

[0027] 3. Dissolve ammonium persulfate in deionized water to obtain an ammonium persulfate solution; add the ammonium persulfate solution to the mixed solution B, in-situ ...

specific Embodiment approach 2

[0035] Embodiment 2: This embodiment differs from Embodiment 1 in that: the power of the ultrasound is 1000w, and the frequency is 30KHZ. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0036] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that: the condition of the ultrasonic washing described in step 1 is the ultrasonic time of 1-10 hours. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a preparation method and application of a polypyrrole / graphene / bacterial cellulose conducting film material. The invention relates to a preparation method and preparation of a conducting film material. A conducting film material prepared according to the existing method has poor stability, cycling performance and mechanical property and electrolyte adopted when the conducting film material is used as an electrode corrodes the conducting film material and a device. With adoption of the preparation method disclosed by the invention, all these problems can be solved. The method comprises the following steps: preparing bacterial cellulose pulp; preparing a graphene / bacterial cellulose composite material; preparing a polypyrrole coated graphene / bacterial cellulose composite material; directly carrying out vacuum filtering on the reaction solution of the polypyrrole coated graphene / bacterial cellulose composite material to form a film; and finally drying. The polypyrrole / graphene / bacterial cellulose conducting film material is applied to a supercapacitor. The polypyrrole / graphene / bacterial cellulose conducting film material can load high active matter mass in unit area, can be synthesized simply, has controllable electrical conductivity and good rate capability, can be put into large-scale production and can be used for preparing a symmetric supercapacitor with high capacitive character. The invention belongs to the technical field of nanomaterial.

Description

technical field [0001] The invention relates to a preparation method and application of a polypyrrole / graphene / bacterial cellulose conductive film material. Background technique [0002] Supercapacitors combine the advantages of batteries and traditional dielectric capacitors, and their energy density and power density fill the gap between batteries and traditional dielectric capacitors. In recent years, conductive polymers have been rapidly developed as supercapacitor electrode materials. Among them, polypyrrole has high pseudocapacitance, easy synthesis, simple process, controllable morphology, stable chemical properties and environmental friendliness, and is favored by people. However, as an electrode active material, during the charging and discharging process, the molecular chain will be broken and destroyed due to the change in volume, resulting in a decrease in the specific capacity and cycle performance of the supercapacitor. The volume change of molecular chains ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/48H01G11/36H01G11/30H01G11/86
CPCY02E60/13H01G11/48H01G11/30H01G11/36H01G11/86
Inventor 黄玉东马丽娜刘荣王芳赵敏杨少强
Owner HARBIN INST OF TECH
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