A kind of preparation method of sandwich structure composite graphene oxide paper electrode material

A composite oxidation and electrode material technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of reducing the utilization rate of active materials, increasing electrode resistance, and reducing the proportion of active materials, so as to promote electron transfer, Increase flexibility, good support effect

Active Publication Date: 2018-03-02
CHANGZHOU UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the addition of binder and conductive agent in this electrode, the proportion of active material in the electrode decreases, and due to the non-conductivity of the binder, it can block the transport of charges and the flow of electrolyte to the electrode material and electrode surface. Diffusion, which not only reduces the utilization of the active material but also increases the resistance of the electrode

Method used

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  • A kind of preparation method of sandwich structure composite graphene oxide paper electrode material
  • A kind of preparation method of sandwich structure composite graphene oxide paper electrode material
  • A kind of preparation method of sandwich structure composite graphene oxide paper electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0019] (1) Weigh 0.0250g of graphite oxide (oxygen content 15%) in 50ml of ethanol to ultrasonically disperse it completely for 1h;

[0020] (2) take by weighing 1.0913g cobalt nitrate and stir to dissolve completely in graphene ethanol solution;

[0021] (3) adjusting the pH of the homogeneous solution in step (2) to 9, and reacting at 80° C. for 10 h;

[0022] (4) filtering the solution in step (3) through a microporous membrane to carry out layer-by-layer self-assembly, washing three times with deionized water and ethanol, and drying at low temperature to form a sandwich-structure composite graphene oxide paper electrode material;

[0023] (5) The electrode material obtained in step (4) was calcined at 150° C. for 1 h, and then soaked in the electrolyte to be tested for 12 h after calcination.

[0024] The sandwich structure composite graphene oxide paper prepared in Example 1 is used as the electrode material of supercapacitor, and a higher specific capacitance is obtaine...

Embodiment 2

[0026] (1) Weigh 0.1500g of graphite oxide (oxygen content 25%) in 50ml of ethylene glycol by ultrasonic for 2h to make it completely dispersed;

[0027] (2) take by weighing 12.474g nickel chloride and stir to dissolve completely in graphene ethylene glycol solution;

[0028] (3) adjusting the pH of the homogeneous solution in step (2) to 8, and reacting at 130° C. for 8h;

[0029] (4) filtering the solution in step (3) through a microporous membrane to carry out layer-by-layer self-assembly, washing three times with deionized water and ethanol, and drying at low temperature to form a sandwich-structure composite graphene oxide paper electrode material;

[0030] (5) The electrode material obtained in step (4) was calcined at 100° C. for 1 h, and then immersed in the electrolyte to be tested for 8 h after calcination.

[0031] The sandwich structure composite graphene oxide paper prepared in Example 2 is used as the electrode material for supercapacitors, and a higher specifi...

Embodiment 3

[0033] (1) Weigh 0.0750g of graphite oxide (oxygen content 40%) in 50ml ethylene glycol / water mixed solution by ultrasonic for 1h to disperse it completely;

[0034] (2) take by weighing 4.1813g manganese sulfate and stir to dissolve completely in graphene glycol / water mixed solution;

[0035] (3) adjusting the pH of the homogeneous solution in step (2) to 10, and reacting at 100° C. for 12 hours;

[0036] (4) filtering the solution in step (3) through a microporous membrane to carry out layer-by-layer self-assembly, washing three times with deionized water and ethanol, and drying at low temperature to form a sandwich-structure composite graphene oxide paper electrode material;

[0037] (5) The electrode material obtained in step (4) was calcined at 170° C. for 0.5 h, and then soaked in the electrolyte to be tested for 16 h after calcination.

[0038] The sandwich structure composite graphene oxide paper prepared in Example 3 was used as the electrode material for supercapaci...

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Abstract

The invention belongs to the field of composite electrode material preparation, and in particular relates to the preparation of a composite graphene oxide paper electrode material with a sandwich structure. A sandwich structure composite graphene oxide paper electrode material is prepared by a one-step method. The specific steps are: ultrasonically disperse graphite oxide in a solvent, then add a transition metal salt and keep stirring to make the system evenly mixed, adjust the pH to alkaline and then adjust the pH to 80-150 After reacting at ℃ for 8-12h, suction filtration, washing and drying at low temperature, a sandwich structure composite graphene oxide paper electrode material was obtained. In order to improve the electrochemical properties of the electrode material, it was calcined and soaked in the electrolyte after calcining. The raw materials of the prepared material are cheap and easy to obtain, the process is simple and easy to operate, the production cost is low, and it is suitable for industrial production, and the prepared electrode material shows excellent electrochemical performance.

Description

technical field [0001] The invention belongs to the field of composite electrode material preparation, in particular to a preparation method of a sandwich structure composite graphene oxide paper electrode material. Background technique [0002] Supercapacitors are a new type of electrochemical energy storage devices that have received extensive attention due to their higher power density and cycle life than lithium batteries. The most important task of constructing electrochemical capacitors is to explore electrode materials with high energy density and high current density. Hybrid capacitors have higher energy density, higher specific capacitance, and wider working potential window because they combine the advantages of electric double layer capacitors and pseudocapacitors, so they have broader application prospects than the other two capacitors. [0003] Most of the electrode materials that have been reported so far are powder composites. In the process of preparing elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/32H01G11/46H01G11/86
CPCY02E60/13
Inventor 何光裕陈海群邱琪玲陈卫东王汉明邵国柱
Owner CHANGZHOU UNIV
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