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A kind of preparation method of flexible supercapacitor cathode material

A technology for supercapacitors and positive electrode materials, applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, hybrid capacitor collectors, etc., can solve problems such as poor conductivity, reduce internal resistance, improve utilization, and facilitate electron transmission Effects with ion transfer

Active Publication Date: 2021-12-21
CHINA-SINGAPORE INT JOINT RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to their poor electrical conductivity, transition metal oxides / sulfides must form complexes with activated carbons with better electrical conductivity to be used as electrode materials for high-performance supercapacitors.

Method used

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  • A kind of preparation method of flexible supercapacitor cathode material
  • A kind of preparation method of flexible supercapacitor cathode material
  • A kind of preparation method of flexible supercapacitor cathode material

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Nickel-cobalt-sulfur / graphene composite electrodeposition using the selected method, the nickel-cobalt-sulfur electrochemical cyclic voltammetry sample of the foam is deposited on the graphene to form a fluffy porous composite material. First, the length of already prepared 2cm, width 1cm this graphene foam cleaned with acetone, ethanol and deionized water. Take 0.12g of cobalt chloride hexahydrate, 0.17 g of nickel chloride hexahydrate and 0.4505g of thiourea was dissolved in 100mL of deionized water and stirred, form an electrolyte dissolved. In the three-electrode system, a cyclic voltammetry method of electrodeposition. Platinum foil electrode as a counter electrode, Ag / AgCl as a reference electrode, the electrode holder multifunctional foam is sandwiched between the graphene as a working electrode, a voltage window is -1.2V to 0.2V, cyclic ring 4, the scan rate was 5mV s -1 . The graphene foam sample sulfur deposition of nickel and cobalt from the electrode holder ...

Embodiment 2

[0046] Nickel-cobalt-sulfur / graphene composite electrodeposition using the selected method, the nickel-cobalt-sulfur electrochemical cyclic voltammetry sample of the foam is deposited on the graphene to form a fluffy porous composite material. First, the length of already prepared 2cm, width 1cm this graphene foam cleaned with acetone, ethanol and deionized water. Take 0.12g of cobalt chloride hexahydrate, 0.17 g of nickel chloride hexahydrate and 0.4505g of thiourea was dissolved in 100mL of deionized water and stirred, form an electrolyte dissolved. In the three-electrode system, a cyclic voltammetry method of electrodeposition. Platinum foil electrode as a counter electrode, Ag / AgCl as a reference electrode, the electrode holder multifunctional foam is sandwiched between the graphene as a working electrode, a voltage window is -1.2V to 0.2V, circular ring 8, the scan rate was 5mV s -1 . The graphene foam sample sulfur deposition of nickel and cobalt from the electrode holde...

Embodiment 3

[0049] Nickel-cobalt-sulfur / graphene composite electrodeposition using the selected method, the nickel-cobalt-sulfur electrochemical cyclic voltammetry sample of the foam is deposited on the graphene to form a fluffy porous composite material. First, the length of already prepared 2cm, width 1cm this graphene foam cleaned with acetone, ethanol and deionized water. Take 0.29g of cobalt chloride hexahydrate and thiourea was dissolved in 0.4505g Add 100 mL of deionized water and stirred, form an electrolyte dissolved. In the three-electrode system, a cyclic voltammetry method of electrodeposition. Platinum foil electrode as a counter electrode, Ag / AgCl as a reference electrode, the electrode holder multifunctional foam is sandwiched between the graphene as a working electrode, a voltage window is -1.2V to 0.2V, cyclic ring 4, the scan rate was 5mV s -1 . The sulfur deposited cobalt graphene foam samples from the lower electrode holder up, washed with ethanol and deionized water c...

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Abstract

The invention discloses a method for preparing a positive electrode material for a flexible supercapacitor. The steps of the preparation method are as follows: firstly, nickel ions and cobalt ions are co-deposited with dual ions on the surface of a three-dimensional graphene foam by an electrochemical method to obtain the positive electrode material for a supercapacitor, and The morphology and performance of the material are modified with different electrochemical deposition times to improve the conductivity, ion conductivity and electron mobility of the material. The prepared positive electrode material has a petal shape, and its nanosheets are composed of 3-5 nanometer crystal grains, which are evenly distributed and have a larger reaction interface area with the electrolyte, which is conducive to generating more electrochemical redox reaction charges , to achieve a significant improvement in material performance. The test results of the electrochemical energy storage performance of the material show that the material has excellent electrochemical energy storage performance and cycle stability. Based on graphene foam, the material has very good flexibility.

Description

Technical field [0001] The present invention relates to the field of supercapacitor electrode material, and more particularly to a method of preparing a flexible supercapacitor positive electrode material. Background technique [0002] Energy is the basis of human beings living and developing. However, fossil fuel such as kerosene and oil leads to environmental issues, such as room temperature and resource scarcity, and the contradiction between energy supply and demand is increasingly prominent. Therefore, in order to realize the sustainable development of human society, it is urgent to find new green energy to replace traditional energy. In the electrochemical energy storage area, since chemical power can be directly converted to electrical energy, and the energy conversion rate is high, it is widely concerned. Super capacitors, lithium-ion batteries and fuel cells show great potential value in industrial, military and aerospace sectors. [0003] The transition metal has an unf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/70H01G11/68H01G11/30H01G11/26H01G11/24C25D9/04C25D17/12B82Y30/00B82Y40/00
CPCH01G11/86H01G11/70H01G11/68H01G11/30H01G11/26H01G11/24C25D9/04C25D17/12B82Y30/00B82Y40/00Y02E60/13
Inventor 申泽骧张春艳来琳斐
Owner CHINA-SINGAPORE INT JOINT RES INST
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