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Preparation method for graphene self-assembly body for super-capacitor based on supramolecular interaction

A technology of supercapacitors and graphene, which is applied in the manufacture of hybrid/electric double layer capacitors and electrodes of hybrid capacitors, and can solve problems such as specific surface reduction

Active Publication Date: 2015-09-09
YANGZHOU UNIV
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Problems solved by technology

[0004] However, graphene oxide will aggregate violently during the reduction process, so that its specific surface area will decrease sharply, which will limit its application in supercapacitors.

Method used

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  • Preparation method for graphene self-assembly body for super-capacitor based on supramolecular interaction
  • Preparation method for graphene self-assembly body for super-capacitor based on supramolecular interaction

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Experimental program
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Embodiment Construction

[0026] 1. Preparation of graphene three-dimensional self-assembly

[0027] 1. Preparation of β-polycyclodextrin:

[0028] Add 20 g of β-CD to 32 mL of 30 wt% NaOH aqueous solution, stir at room temperature until β-CD is dissolved, and after 5 hours in a water bath at 30 °C, add 9.64 mL of epichlorohydrin into the mixture, stir for 24 h, and cool to room temperature. After the salt was removed by dialysis, the solution was evaporated to dryness to obtain a white solid, which was dried in vacuum for 24 hours (vacuum degree 1200-4800 Pa, drying temperature 50-70 ℃), and the water-soluble β-CD polymer was obtained, namely beta-polycyclodextrin.

[0029] 2. Preparation of β-polycyclodextrin modified graphene oxide (GOβ-CDP):

[0030] In an Erlenmeyer flask, add 5 mg of graphene oxide powder solid powder, add water and sonicate to obtain a uniform graphene oxide suspension with a concentration of 1 mg / L, and add 100 mL of β-polycyclone with a concentration of 0.5 mg / L to the...

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Abstract

The invention relates to a preparation method for a graphene self-assembly body for a super-capacitor based on supramolecular interaction, and relates to the technical field of supramolecular chemistry. The method comprises the steps: enabling cyclodextrin to be absorbed on the surface of graphene; adding polyethylene glycol 2-adamantane serving as bridge chain molecules, thereby achieving the self-assembly of graphene. The prepared graphene three-dimensional self-assembly body not only solves a problem that the graphene convergence causes small specific capacitance, and greatly increases the specific capacitance, thereby indicating that the graphene self-assembly body is good in application prospect for super-capacitors.

Description

technical field [0001] The invention relates to the field of preparation of supercapacitor materials, in particular to the technical field of supramolecular chemistry, especially the technical field of graphene self-assembly production. Background technique [0002] The development of the world economy and ecological environment is increasingly affected by climate and energy, and all of these will be closely related to the normal life of human beings. Everyone knows that fossil energy will be exhausted one day, and the environmental pollution caused by the burning of fossil energy is getting more and more serious. Therefore, people urgently need to find environmentally friendly and renewable energy to replace fossil energy to meet the needs of economic development and the development of human society. Supercapacitor (also known as electrochemical capacitor), a new type of energy storage element, its performance is between that of batteries and traditional capacitors. Comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/32
CPCY02E60/13H01G11/86H01G11/30H01G11/32H01G11/36
Inventor 刁国旺蔡寅倪鲁彬张旺陈铭
Owner YANGZHOU UNIV
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