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Preparation method and application of nanometer nickel sulfide-graphene composite electrode material

A graphene composite and electrode material technology, applied in the field of electrochemistry, can solve problems such as single performance and cumbersome preparation of nickel sulfide composite materials, and achieve the effects of simplifying the synthesis steps, increasing dispersion and electrochemical activity, and avoiding pollution

Active Publication Date: 2018-12-18
CHANGZHOU INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the technical defects or improvement needs of the existing nano-nickel sulfide composite material, the present invention provides a nano-nickel sulfide-graphene composite material and its preparation method, aiming to solve the technical problems of cumbersome preparation and single performance of the current nickel sulfide composite material

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  • Preparation method and application of nanometer nickel sulfide-graphene composite electrode material
  • Preparation method and application of nanometer nickel sulfide-graphene composite electrode material

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Embodiment 1

[0027] 1. Preparation of nano-nickel sulfide-graphene composite electrode materials

[0028] (1) Arrange clean 1cm*1cm carbon fibers in a 3mg / ml graphene oxide solution. After the surface of the carbon cloth is completely loaded with graphene oxide, take out the carbon cloth and dry it under vacuum at 60°C for 8 hours to obtain a concentration of about 1.6mg / cm 2 Graphene oxide / carbon fiber cloth of graphene oxide;

[0029] (2) Assembling a three-electrode system, using the graphene oxide / conductive carbon base obtained in step (1) as a working electrode, using 30mmol / L nickel chloride as an electrolyte, using a constant potential deposition method, the deposition potential is -1.1 V, the deposition time is 10min, depositing nano-nickel hydroxide on the surface of graphene / carbon fiber cloth realizes the electroreduction of graphene oxide, and obtains nickel hydroxide-graphene composite material;

[0030] (3) React 8 mg of nickel hydroxide-graphene composite material obtained...

Embodiment 2

[0037] 1. Preparation of nano-nickel sulfide-graphene composite electrode materials

[0038] (1) Arrange clean 1cm*1cm carbon fibers in a 2mg / ml graphene oxide solution. After the surface of the carbon cloth is completely loaded with graphene oxide, take out the carbon cloth and dry it under vacuum at 50°C for 10 hours to obtain a concentration of about 1mg / cm 2 Graphene oxide / carbon fiber cloth of graphene oxide;

[0039] (2) Assembling a three-electrode system, using the graphene oxide / conductive carbon base obtained in step (1) as the working electrode, using 20mmol / L nickel nitrate as the electrolyte, using the constant potential deposition method, the deposition potential is -1.0V , the deposition time is 20min, while depositing nano-nickel hydroxide on the surface of graphene / carbon fiber cloth, the electroreduction of graphene oxide is realized to obtain nickel hydroxide-graphene composite material;

[0040] (3) React 5 mg of nickel hydroxide-graphene composite materia...

Embodiment 3

[0046] 1. Preparation of nano-nickel sulfide-graphene composite electrode materials

[0047] (1) Arrange clean 1cm*1cm carbon fibers in a 4mg / ml graphene oxide solution. After the surface of the carbon cloth is completely loaded with graphene oxide, take out the carbon cloth and dry it under vacuum at 70°C for 6 hours to obtain a concentration of about 2mg / cm 2 Graphene oxide / carbon fiber cloth of graphene oxide;

[0048] (2) Assembling a three-electrode system, using the graphene oxide / conductive carbon base obtained in step (1) as the working electrode, using 40mmol / L of nickel sulfate as the electrolyte, using the constant potential deposition method, the deposition potential is -1.2V , the deposition time is 15min, while depositing nano-nickel hydroxide on the surface of graphene / carbon fiber cloth, the electroreduction of graphene oxide is realized to obtain nickel hydroxide-graphene composite material;

[0049] (3) React 10 mg of nickel hydroxide-graphene composite obta...

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Abstract

The invention discloses relates to a preparation method and application of a f nanometer nickel sulfide-graphene composite electrode material, belonging to the field of electrochemistry. The materialis prepared by loading graphene oxide on carbon fiber cloth, reducing graphene oxide while depositing nanometer nickel hydroxide on the surface of the graphene oxide / carbon fiber cloth by a potentiostatic deposition method, so as to obtain a nickel hydroxide-graphene composite material, and finally reacting with sodium sulfide to obtain nanometer nickel sulfide-graphene composite material. The present invention is mainly used in the field of electrochemical energy storage and electrochemical sensors.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and more specifically relates to a preparation method and application of a nano-nickel sulfide-graphene composite electrode material. Background technique [0002] With the rapid development and mutual integration of material science and nanotechnology, the design of new nanocomposites has become a research hotspot in many electrochemical fields such as electrocatalysis, electrochemical energy storage and conversion, and electrochemical sensors. As a dazzling new star in the family of nano-carbon materials, graphene has 140 times higher electron mobility than silicon, 100 times higher tensile strength than alloy steel of the same thickness, lower surface resistance than copper or silver, and good biocompatibility , low synthesis cost and high thermodynamic stability, this series of excellent characteristics make it widely used in the field of electrochemistry. [0003] In order to meet ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/36G01N27/327C01G53/11C01B32/184B82Y30/00B82Y15/00
CPCB82Y15/00B82Y30/00C01G53/11C01B32/184G01N27/3278H01G11/30H01G11/36Y02E60/13
Inventor 董爽向萌秦双
Owner CHANGZHOU INST OF TECH
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