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Preparation method of graphene material of supercapacitor

A supercapacitor, graphene technology, applied in the manufacture of capacitors, hybrid/electric double-layer capacitors, electrolytic capacitors, etc., can solve the problems of high equipment requirements, unsuitable for industrial production, unstable cycle performance, complex processes, etc. The effect of charge storage, low cost, and simple process

Inactive Publication Date: 2012-07-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its complex process and high equipment requirements, it is not suitable for industrial production.
The existing invention patent application with publication number CN102013330 discloses graphene and porous nickel oxide composite supercapacitor film material, which greatly increases the specific capacity of the electrode, but the cycle performance is not stable

Method used

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  • Preparation method of graphene material of supercapacitor
  • Preparation method of graphene material of supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment one: Graphite oxide is placed in vial, it is sealed with bottle stopper. React for 30-120s in a microwave oven with medium-high heat, repeat the above operation, and prepare 0.4g of expanded graphene. 0.3gZnCl 2 Configure it as a 6mol / L solution, add 0.4g graphene and stir vigorously for 6-24h. Filter the solution with a filter membrane, and wash it with acid and deionized water several times until neutral. Vacuum dry in a drying oven at 50°C for 10-20 hours. Pass CO in CVD at 600-900°C 2 Gas, reaction 2h. Pass N during heating and cooling 2 for protection. The prepared supercapacitor electrode material has a specific capacity of 160 F / g and a specific energy of 32 Wh / Kg measured at a current density of 100 mA / g.

Embodiment 2

[0014] Embodiment 2: Graphite oxide is placed in a beaker, and it is sealed with a bottle stopper. React for 30-120s in a microwave oven with medium-high heat, repeat the above operation, and prepare 0.4g of expanded graphene. 0.6gZnCl 2 Configure it as a 6mol / L solution, add 0.4g graphene and stir vigorously for 6-24h. Filter the solution with a filter membrane, and wash it with acid and deionized water several times until neutral. Vacuum dry in a drying oven at 50°C for 10-20 hours. Pass CO in CVD at 600-900°C 2 Gas, reaction 2h. Pass N during heating and cooling 2 for protection. The prepared supercapacitor electrode material has a specific capacity of 186 F / g and a specific energy of 37 Wh / Kg measured at a current density of 100 mA / g.

Embodiment 3

[0015] Embodiment 3: Graphite oxide is placed in a beaker, and it is sealed with a bottle stopper. React for 30-120s in a microwave oven with medium-high heat, repeat the above operation, and prepare 0.4g of expanded graphene. 1gZnCl 2 Configure it as a 6mol / L solution, add 0.4g graphene and stir vigorously for 6-24h. Filter the solution with a filter membrane, and wash it with acid and deionized water several times until neutral. Vacuum dry in a drying oven at 50°C for 10-20 hours. Pass CO in CVD at 600-900°C 2 Gas, reaction 2h. Pass N during heating and cooling 2 for protection. The prepared supercapacitor electrode material has a specific capacity of 200 F / g and a specific energy of 40 Wh / Kg measured at a current density of 100 mA / g.

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Abstract

The invention relates to a preparation method of graphene material of a supercapacitor. The preparation method comprises the following steps of: step one, preparation of expanded graphene, comprising the steps of placing 1-2 parts by weight of graphite oxide into a heating container, sealing the heating container, rapidly warming and heating for 30-120s, preparing 0.5-1 part by weight of the expanded graphene; and step two, preparation of activated graphene. The invention has the beneficial effects that the graphene material prepared by adopting the preparation method provided by the invention improves cellular structure of graphene on the basis that composition of the graphene is not changed, thus the graphene material is more beneficial to charge storage, the specific capacity of a graphene supercapacitor is improved, the specific volume of the supercapacitor in organic electrolyte reaches up to 200F / g, and energy density can reach up to 40Wh / kg; meanwhile, the preparation method provided by the invention has simple technological process and low cost.

Description

technical field [0001] The invention relates to the technical field of electronic materials for electrical components, in particular to the technical field of supercapacitor materials. Background technique [0002] Supercapacitor (supercapacitor, ultracapacitor), also known as electrical double layer capacitor (Electrical Doule-Layer Capacitor), electrochemical capacitor (Electrochemcial Capacitor, EC), gold capacitor, farad capacitor, stores energy through polarized electrolyte. A supercapacitor can be regarded as two non-reactive porous electrode plates suspended in the electrolyte. When electricity is applied to the plates, the positive plate attracts negative ions in the electrolyte, and the negative plate attracts positive ions, actually forming two capacitive storage layer, the separated positive ions are near the negative plate, and the negative ions are near the positive plate, such as figure 1 As shown in the figure, the outer side of the porous electrode plate is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/058H01G11/86
CPCY02E60/13
Inventor 陈远富黄然王泽高李萍剑贺家瑞张万里李言荣
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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