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Method for preparing electrode material of sandwich structured composite graphene oxide paper

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 decreasing the proportion of active materials, reducing the utilization rate of active materials, and increasing electrode resistance, and achieves a good supporting effect. The effect of promoting electron transfer and increasing flexibility

Active Publication Date: 2016-08-10
CHANGZHOU UNIV +1
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  • Summary
  • 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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  • Method for preparing electrode material of sandwich structured composite graphene oxide paper
  • Method for preparing electrode material of sandwich structured composite graphene oxide paper
  • Method for preparing electrode material of sandwich structured composite graphene oxide paper

Examples

Experimental program
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Effect test

Embodiment 1

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

[0020] (2) Take by weighing 1.0913g cobalt nitrate and stir in graphene ethanol solution until completely dissolving;

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

[0022] (4) The solution in step (3) is filtered through a microporous membrane to carry out layer-by-layer self-assembly, and after each washing with deionized water and ethanol for 3 times, it is dried at low temperature to form a sandwich structure composite graphene oxide paper electrode material;

[0023] (5) Calcining the electrode material obtained in step (4) at 150° C. for 1 h, and then soaking it in the electrolyte solution to be tested for 12 h after calcining.

[0024] The composite graphene oxide paper with sandwich structure prepared in Example 1 is used as an electrode material for supercapacitors to obtain a hi...

Embodiment 2

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

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

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

[0029] (4) The solution in step (3) is filtered through a microporous membrane to carry out layer-by-layer self-assembly, and after each washing with deionized water and ethanol for 3 times, it is dried at low temperature to form a sandwich structure composite graphene oxide paper electrode material;

[0030] (5) Calcining the electrode material obtained in step (4) at 100° C. for 1 h, and then soaking it in the electrolyte solution to be tested for 8 h after calcining.

[0031] The composite graphene oxide paper with sandwich structure prepared in Example 2 is used as an electrode material for a superc...

Embodiment 3

[0033] (1) Weigh 0.0750g of graphite oxide (40% oxygen content) in 50ml ethylene glycol / water mixed solution and ultrasonically 1h to make it completely dispersed;

[0034] (2) Take by weighing 4.1813g manganese sulfate and stir in graphene ethylene glycol / water mixed solution until completely dissolving;

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

[0036] (4) The solution in step (3) is filtered through a microporous membrane to carry out layer-by-layer self-assembly, and after each washing with deionized water and ethanol for 3 times, it is dried at low temperature to form a sandwich structure composite graphene oxide paper electrode material;

[0037] (5) Calcining the electrode material obtained in step (4) at 170° C. for 0.5 h, and then immersing it in the electrolyte solution to be tested for 16 h after calcining.

[0038] The composite graphene oxide paper with sandwich structure prepared in Example 3 is...

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Abstract

The invention belongs to the field of preparation of composite electrode materials, and in particular relates to preparation of an electrode material of a piece of sandwich structured composite graphene oxide paper. The electrode material of the sandwich structured composite graphene oxide paper is prepared through a one-step method. The method specifically comprises the following steps of ultrasonically dispersing graphite oxide in a solvent, adding transition metal salt to discontinuously stir, such that the system is uniformly mixed, reacting at 80-150 DEG C for 8-12 h after adjusting pH to alkalinity, and performing suction filtration, washing and drying at low temperature so as to obtain the electrode material of the sandwich structured composite graphene oxide paper. To improve the electrochemical property of the electrode material, the electrode material is roasted and immersed in electrolyte after being roasted. The preparation material is cheap and available in raw material, simple and convenient in process operation and low in production cost, and is suitable for industrial production; and furthermore, the prepared electrode material has excellent electrochemical property.

Description

technical field [0001] The invention belongs to the field of composite electrode material preparation, and in particular relates 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 components that have attracted extensive attention due to their higher power density and cycle life than lithium batteries. The most important task in constructing electrochemical capacitors is to explore electrode materials with high energy density and high current density. Due to the combination of the advantages of electric double layer capacitors and pseudocapacitors, hybrid capacitors have higher energy density, higher specific capacitance, and wider operating potential window, so they have broader application prospects than the other two capacitors. [0003] Most of the electrode materials reported so far are powdery composites. In the process of prep...

Claims

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Application Information

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IPC IPC(8): H01G11/32H01G11/46H01G11/86
CPCY02E60/13H01G11/32H01G11/46H01G11/86
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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