A nickel sulfide/graphene/co 3 the s 4 Preparation method of three-dimensional composite hydrogen storage material

A three-dimensional composite and hydrogen storage material technology is applied in the field of preparation of electrochemical hydrogen storage electrode materials, which can solve the problem that cobalt sulfide composite materials cannot be used as electrochemical hydrogen storage electrodes, etc. The effect of high hydrogen performance

Active Publication Date: 2017-06-30
HEBEI NORMAL UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0006] The present invention aims to solve the technical problem that existing cobalt sulfide composite materials cannot be used as electrochemical hydrogen storage electrodes, and provides a nickel sulfide / graphene / Co 3 S 4 Preparation method of three-dimensional composite hydrogen storage material

Method used

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  • A nickel sulfide/graphene/co <sub>3</sub> the s <sub>4</sub> Preparation method of three-dimensional composite hydrogen storage material
  • A nickel sulfide/graphene/co <sub>3</sub> the s <sub>4</sub> Preparation method of three-dimensional composite hydrogen storage material
  • A nickel sulfide/graphene/co <sub>3</sub> the s <sub>4</sub> Preparation method of three-dimensional composite hydrogen storage material

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specific Embodiment approach 1

[0022] Specific embodiment one: a nickel sulfide / graphene / Co of this embodiment 3 S 4 The preparation method of the three-dimensional composite hydrogen storage material is carried out in the following steps:

[0023] 1. Prepare graphene oxide dispersion solution by Hummers method, adjust the concentration to 1.8~2.2mg / mL;

[0024] 2. Add cobalt acetate and sulfur to the graphene oxide dispersion solution at a molar ratio of 1:(3~4), continue to stir until uniform, to obtain a mixed solution; wherein the mass ratio of cobalt acetate to graphene is 1:(0.2 ~0.5);

[0025] 3. Press ZrO 2 The mass ratio of the grinding ball to the mixed liquid is 1:(15~20), the ZrO 2 The grinding ball and the mixed liquid are loaded with ZrO 2 The lining ball milling tank is filled with high-purity argon gas, and finally the ball milling tank is fixed in the ball mill, and the ball milling is performed at a speed of 500-700 rpm for 4-8 hours. After the ball milling is completed, the ball milling tank is ...

specific Embodiment approach 2

[0028] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the concentration of graphene oxide in the graphene oxide dispersion solution in step 1 is 2 mg / mL; the others are the same as Embodiment 1.

specific Embodiment approach 3

[0029] Specific embodiment three: This embodiment is different from specific embodiment one or two in that the molar ratio of cobalt acetate to sulfur in step two is 1:3.5; the others are the same as those in specific embodiment one or two.

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Abstract

The invention provides a preparation method of a nickel sulfide / graphene / cobalt sulfide three-dimensional composite hydrogen storage material, relates to a method for preparing the three-dimensional composite hydrogen storage material and aims at solving the technical problem that an existing cobalt sulfide composite material cannot be used as an electrochemical hydrogen storage electrode. The method comprises the following steps: (1) preparing a graphene oxide disperse solution; (2) adding cobaltous acetate and sulphur to the graphene oxide disperse solution to prepare a mixed solution; (3) preparing a mixed dispersion liquid in a ball-milling manner; (4) cleaning nickel foam; and (5) adding the mixed dispersion liquid to a hydrothermal kettle, adding glucose, immersing the nickel foam into the mixed dispersion liquid, carrying out hydrothermal reaction and then carrying out cleaning and freeze drying on the product to obtain the nickel sulfide / graphene / cobalt sulfide three-dimensional composite hydrogen storage material. The specific surface area of the composite hydrogen storage material is 67-78m<2> / g; the preparation method is simple; the reaction period is short; final treatment is not needed; the hydrogen storage property is high; and the nickel sulfide / graphene / cobalt sulfide three-dimensional composite hydrogen storage material can be directly applied to the field of electrochemical hydrogen storage as the hydrogen storage electrode.

Description

Technical field [0001] The invention relates to a method for a three-dimensional composite hydrogen storage material, in particular to a method for preparing an electrochemical hydrogen storage electrode material. Background technique [0002] The energy crisis and environmental pollution have become a global problem. In order to realize the sustainable development of society, countries around the world continue to increase the development of new energy sources in order to obtain efficient, clean and pollution-free energy. Among the new energy sources, hydrogen energy has the highest energy-to-mass ratio, clean and pollution-free during use, and its development and utilization have received extensive attention. However, hydrogen energy is not easy to store. After long-term research, researchers have found that solid hydrides can realize the reversible utilization of hydrogen energy through electrochemical methods. Therefore, the research focus of hydrogen storage technology has t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/24
CPCH01M4/366H01M4/5815H01M4/625H01M10/24Y02E60/10
Inventor 韩璐曹栋张志伟
Owner HEBEI NORMAL UNIVERSITY OF SCIENCE AND TECHNOLOGY
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