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Method for preparing interconnected and folded graphene materials for super-capacitor

A supercapacitor, interconnected technology, applied in the field of carbon material preparation, can solve the problems of high energy consumption, large pollution, and difficult separation in the separation process, and achieve the effects of good cycle stability, low cost and simple process

Inactive Publication Date: 2015-12-02
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These three components are very easy to form some two-component eutectics and a series of solid solutions during the separation process, which is difficult to separate, and the separation process requires high energy consumption and large pollution.

Method used

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  • Method for preparing interconnected and folded graphene materials for super-capacitor
  • Method for preparing interconnected and folded graphene materials for super-capacitor
  • Method for preparing interconnected and folded graphene materials for super-capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Interconnected and wrinkled graphene material IFCG 9-800 The specific preparation process is as follows:

[0023] (1) Pretreatment of reactants: Weigh 12g KOH solids and put them in a mortar, grind and pulverize them, add 9g nano-magnesia powder, mix the two evenly to obtain a mixed powder, add the gained mixed powder to a container containing 6g anthracene In a beaker of oil, add 2.6g N, N-dimethylformamide dropwise to the beaker to dissolve, supplemented by a glass rod to continuously stir, the resulting mixture is ultrasonically oscillated for 1h, and left to stand for 12h to obtain the reactant;

[0024] (2) Preparation of interconnected and wrinkled graphene materials: the reactant obtained in step (1) is put into a corundum porcelain boat, and then the porcelain boat is placed in a tube furnace at a rate of 60mL / min After the air in the tube furnace is exhausted by introducing argon gas, under the flowing argon atmosphere, heat the tube furnace to 300 °C at a hea...

Embodiment 2

[0026] Interconnected and wrinkled graphene material IFCG 9-850 The specific preparation process is as follows:

[0027] (1) Pretreatment of reactant: implement according to the same method as step (1) in Example 1;

[0028] (2) Preparation of interconnected and wrinkled graphene material: implemented in the same manner as step (2) in Example 1, except that the final heating temperature was 850°C. The resulting interconnected and wrinkled graphene material is labeled IFCG 9-850 . IFCG 9-850 Used as a symmetrical supercapacitor electrode material, in BMIMPF 6 In the electrolyte, at a current density of 0.05A / g, IFCG 9-850 The specific volume is 149F / g, and the available energy density is 82Wh / kg.

Embodiment 3

[0030] Interconnected and wrinkled graphene material IFCG 9-900 The specific preparation process is as follows:

[0031] (1) Pretreatment of reactants: implement according to the same method as step (1) in Example 1.

[0032] (2) Preparation of interconnected and wrinkled graphene materials: implemented in the same manner as step (2) in Example 1, except that the final heating temperature was 900°C. The resulting interconnected and wrinkled graphene material is labeled IFCG 9-900 . IFCG 9-900 Used as a symmetrical supercapacitor electrode material, in BMIMPF 6 In the electrolyte, at a current density of 0.05A / g, IFCG 9-900 The specific volume is 231F / g, and the available energy density is 128Wh / kg.

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Abstract

The invention discloses a method for preparing interconnected and folded graphene materials for a super-capacitor and belongs to the technical field of carbon material preparation. According to the method, anthracene oil dissolved by N,N-dimethylfomamide is used as a carbon source, nano magnesium oxide is used as a template and potassium hydroxide is used as an activating agent; and the obtained raw materials are ground and mixed together to obtain a mixture, the mixture is transferred into a corundum porcelain boat, and a target product is directly prepared by heating the mixture under a flowing argon atmosphere. The method takes the low-price anthracene oil as a raw material, and has the advantages of being simple in process, low in cost and suitable for industrial production. The interconnected and folded graphene materials prepared by the method and serving as an electrode material for the super-capacitor show very high capacity and energy density; and in a 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF6) ionic liquid electrolyte and under the condition that the current density is 50mA / g and the electrode specific capacitance reaches 271F / g, the available energy density of the super-capacitor reaches 150Wh / kg and can be comparable with the energy density of a lithium ion battery.

Description

technical field [0001] The invention belongs to the technical field of carbon material preparation, and in particular relates to a method for preparing interconnected and wrinkled graphene materials for supercapacitors. Background technique [0002] A supercapacitor is a special capacitor based on charging and discharging at the electrode-electrolyte interface. As a new type of energy storage device, supercapacitors have the advantages of fast charging and discharging, long cycle life, and wide operating temperature range. The performance of supercapacitors mainly depends on the structure and properties of electrode materials and electrolyte. Because graphene materials have the advantages of good electrical conductivity, large specific surface area, environmental protection, and stable physical and chemical properties, graphene materials are expected to be used as electrode materials for high-performance supercapacitors. At present, graphene on the market is mainly prepare...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 何孝军邵小龙
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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