Preparation method of flexible supercapacitor positive electrode 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, achieve good flexibility and mechanical stability, high yield, The effect of enhancing stability

Active Publication Date: 2020-01-31
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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  • Preparation method of flexible supercapacitor positive electrode material
  • Preparation method of flexible supercapacitor positive electrode material
  • Preparation method of flexible supercapacitor positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The nickel-cobalt-sulfur / graphene composite material chooses to use the electrodeposition method, and the nickel-cobalt-sulfur sample is deposited on the graphene foam by the electrochemical method of cyclic voltammetry to form a fluffy porous composite material. First, clean the prepared graphene foam with a length of 2 cm and a width of 1 cm with acetone, ethanol and deionized water. 0.12g of cobalt chloride hexahydrate, 0.17g of nickel chloride hexahydrate and 0.4505g of thiourea were dissolved in 100mL of deionized water, stirred, and dissolved to form an electrolyte. Electrodeposition was performed using cyclic voltammetry in a three-electrode system. The platinum sheet electrode is used as the counter electrode, the silver / silver chloride is used as the reference electrode, and the graphene foam is clamped by the multifunctional electrode clip as the working electrode. The voltage window is -1.2V to 0.2V, and the cycle is 4 cycles, and the sweep rate is 5mV s -1 ...

Embodiment 2

[0046] The nickel-cobalt-sulfur / graphene composite material chooses to use the electrodeposition method, and the nickel-cobalt-sulfur sample is deposited on the graphene foam by the electrochemical method of cyclic voltammetry to form a fluffy porous composite material. First, clean the prepared graphene foam with a length of 2 cm and a width of 1 cm with acetone, ethanol and deionized water. 0.12g of cobalt chloride hexahydrate, 0.17g of nickel chloride hexahydrate and 0.4505g of thiourea were dissolved in 100mL of deionized water, stirred, and dissolved to form an electrolyte. Electrodeposition was performed using cyclic voltammetry in a three-electrode system. The platinum sheet electrode is used as the counter electrode, the silver / silver chloride is used as the reference electrode, and the graphene foam is clamped by the multifunctional electrode clamp as the working electrode. The voltage window is -1.2V to 0.2V, and the cycle is 8 cycles, and the sweep speed is 5mV s -...

Embodiment 3

[0049] The nickel-cobalt-sulfur / graphene composite material chooses to use the electrodeposition method, and the nickel-cobalt-sulfur sample is deposited on the graphene foam by the electrochemical method of cyclic voltammetry to form a fluffy porous composite material. First, clean the prepared graphene foam with a length of 2 cm and a width of 1 cm with acetone, ethanol and deionized water. Take 0.29g of cobalt chloride hexahydrate and 0.4505g of thiourea and dissolve them in 100mL of deionized water, stir and dissolve to form an electrolyte. Electrodeposition was performed using cyclic voltammetry in a three-electrode system. The platinum sheet electrode is used as the counter electrode, the silver / silver chloride is used as the reference electrode, and the graphene foam is clamped by the multifunctional electrode clip as the working electrode. The voltage window is -1.2V to 0.2V, and the cycle is 4 cycles, and the sweep rate is 5mV s -1 . The graphene foam on which the c...

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Abstract

The invention discloses a preparation method of a flexible supercapacitor positive electrode material. The preparation method comprises the following steps: firstly, nickel ions and cobalt ions are co-deposited on the surface of three-dimensional graphene foam by electrochemical method to obtain supercapacitor positive electrode material, and the morphology and the properties of the material are modified with different electrochemical deposition time to improve the conductivity, the ionic conductivity and the electron mobility of the material. The prepared positive electrode material has petalshape, and its nano sheets are formed by stacking 3-5 nanometer grains which are evenly distributed and have a larger reaction interface area with the electrolyte so that more electrochemical redox reaction charges can be generated and significant improvement of the material performance can be realized. 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. The material also has quite good flexibility based on the graphene foam.

Description

technical field [0001] The invention relates to the technical field of supercapacitor electrode materials, in particular to a preparation method of a flexible supercapacitor positive electrode material. Background technique [0002] Energy is the basis for human survival and development. However, the widespread use of fossil fuels such as kerosene and petroleum has led to environmental problems, such as room temperature effects and resource scarcity, and the contradiction between energy supply and demand has become 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 field of electrochemical energy storage, chemical power sources have attracted extensive attention because they can directly convert chemical energy into electrical energy and have a high energy conversion rate. Supercapacitors, Li-ion batteries and fuel cells show great potential value in...

Claims

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Application Information

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Patent Type & Authority Applications(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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