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Preparation method and application of nitrogen-doped carbon fiber/nitrogen-doped graphene/bacterial cellulose membrane material

A nitrogen-doped graphene and nitrogen-doped carbon fiber technology, which is applied in the manufacture of hybrid/electric double layer capacitors, electrolytic capacitors, hybrid capacitor electrodes, etc., can solve the problem that flexible electrode materials do not have stability, cycle performance and mechanical properties. problem, to achieve the effect of good biodegradability, excellent mechanical properties, and high water holding capacity

Active Publication Date: 2016-02-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention is to solve the problem that the existing method of preparing flexible electrode materials does not have good stability, cycle performance and mechanical properties, and provides a preparation method of nitrogen-doped carbon fiber / nitrogen-doped graphene / bacterial cellulose membrane material and its application

Method used

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  • Preparation method and application of nitrogen-doped carbon fiber/nitrogen-doped graphene/bacterial cellulose membrane material
  • Preparation method and application of nitrogen-doped carbon fiber/nitrogen-doped graphene/bacterial cellulose membrane material

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specific Embodiment approach 1

[0025] Specific embodiment one: the preparation method of a kind of nitrogen-doped carbon fiber / nitrogen-doped graphene / bacterial cellulose membrane material of this embodiment is carried out according to the following steps:

[0026] 1. Soak 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 bacterial cellulose slurry; ultrasonically disperse graphene oxide in deionized water, Obtaining a graphene dispersion; adding the graphene dispersion to the bacterial cellulose slurry, stirring while adding, to obtain a mixed solution A;

[0027] 2. Disperse the pyrrole monomer in deionized water, stir to make it evenly dispersed, add the mixed solution A to the pyrrole dispersion, and stir while adding, to obtain the mixed solution B;

[0028] 3. Dissolve the oxidizing agent in deionized water to obtain an oxidizing agent solution; add the oxidizing agent s...

specific Embodiment approach 2

[0039] Embodiment 2: The difference between this embodiment and Embodiment 1 is 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

[0040] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the conditions of ultrasonic washing described in Steps 1 and 4 are ultrasonic time of 1-10 hours. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method and an application of a nitrogen-doped carbon fiber / nitrogen-doped graphene / bacterial cellulose membrane material, relates to a preparation method and an application of a membrane material and aims to solve the problem that a flexible electrode material prepared with a conventional method does not have good stability, cycle performance and mechanical properties. The method comprises the following steps: preparing bacterial cellulose pulp; preparing a bacterial cellulose and graphene composite; preparing a polypyrrole coated bacterial cellulose and graphene composite; preparing a nitrogen-doped carbon fiber / nitrogen-doped graphene composite through high-temperature carbonization; preparing a nitrogen-doped carbon fiber / nitrogen-doped graphene dispersing agent; performing vacuum pumping filtration on the bacterial cellulose pulp for membrane forming, adding the dispersing agent for continuous pumping filtration for membrane forming, and performing vacuum drying for finishing. The membrane material has low equipment corrosion, low cost, good cycle performance and good mechanical properties and can realize scale production, and a symmetrical supercapacitor prepared from the membrane material has the good capacitive character. The invention belongs to the technical field of nanomaterials.

Description

technical field [0001] The invention relates to a preparation method and application of a nitrogen-doped carbon fiber / nitrogen-doped graphene / bacterial cellulose membrane 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. As electrode materials for supercapacitors, carbon materials have good cycle performance and high stability. Doping carbon materials with heteroatoms such as nitrogen, phosphorus, oxygen, and sulfur can effectively improve the electrochemical performance and surface properties of carbon materials. [0003] With the development of flexible and bendable electronic devices, the development of flexible electrode materials with bending stability has become an important research direction in the field of energy storage. However, the preparation process of existing flexible...

Claims

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Application Information

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IPC IPC(8): H01G11/22H01G11/32H01G11/34H01G11/40H01G11/86
CPCY02E60/13H01G11/22H01G11/32H01G11/34H01G11/40H01G11/86
Inventor 黄玉东马丽娜刘荣刘丽王芳黎俊
Owner HARBIN INST OF TECH
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