Graphene/nickel hydroxide composite material and preparation method thereof, and electrode material

A nickel hydroxide and composite material technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, can solve the problems of complex process, poor uniformity, and unsuitable for large-scale industrial production.

Inactive Publication Date: 2017-01-18
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the co-precipitation method and chemical reduction method are simple but poor in uniformity, and the processes such as electrodeposition method and chemical polymerization method are too complicated to be suitable for large-scale industrial production and still need to be improved.

Method used

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  • Graphene/nickel hydroxide composite material and preparation method thereof, and electrode material
  • Graphene/nickel hydroxide composite material and preparation method thereof, and electrode material
  • Graphene/nickel hydroxide composite material and preparation method thereof, and electrode material

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preparation example Construction

[0028] The embodiment of the present invention discloses a preparation method of graphene / nickel hydroxide composite material, comprising:

[0029] Mix graphene oxide, water, hexamethylenetetramine and a nickel source, heat, and react to obtain a graphene / nickel hydroxide composite material; the nickel source is capable of ionizing Ni in water 2+ source of nickel.

[0030] Such as figure 2 as shown, figure 2 The model diagram prepared for the graphene / nickel hydroxide composite material provided by the present invention, as can be seen from the figure, the application utilizes the hydrothermal method with simple process to simultaneously carry out the generation of nano-nickel hydroxide and the reduction of graphene, from the source and the microcosm The two-phase composite is carried out on the layer, and the nano-nickel hydroxide is uniformly attached to the layered graphene to form a composite material. The composite material prepared by this application has the advant...

Embodiment 1

[0051] Take 0.1g of graphene oxide and disperse it into 100ml of aqueous solution, ultrasonicate with 1000w power ultrasonic equipment for 1h, then add a certain amount of nickel sulfate (NiSO 4 ·6H 2 O) and hexamethylenetetramine ((CH 2 ) 6 N 4 ) were prepared to 0.5mol / L, stirred by magnetic force for 30min, poured the homogeneous ultrasonic solution into the polytetrafluoroethylene reaction kettle, sealed the water heating tank, heated to 180°C and kept it for 20h; Freeze-dried after washing with water to obtain the final product.

[0052] Such as figure 1 as shown, figure 1 For the TEM photo of the graphene / nickel hydroxide composite material prepared by the present embodiment, graphene (arrow place) among the figure is the large tulle layer of specific surface area, and nanometer nickel hydroxide is attached on the graphene layer, forms graphene / nickel hydroxide Nickel hydroxide composite structure; image 3 and Figure 4 single-phase Ni(OH) 2 , rGO and rGO / Ni(OH...

Embodiment 2

[0057] Take 0.05g of graphene oxide and disperse it into 100ml of aqueous solution, ultrasonicate with 1000w power ultrasonic equipment for 1h, then add a certain amount of nickel sulfate (NiSO 4 ·6H 2 O) and hexamethylenetetramine ((CH 2 ) 6 N 4 ) were all prepared to 0.4mol / L, stirred by magnetic force for 30min, poured the homogeneous ultrasonic solution into the polytetrafluoroethylene reaction kettle, sealed the water heating tank, heated to 180°C and kept it for 18h; Freeze-dried after washing with water to obtain the final product.

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Abstract

The invention provides a preparation method of a graphene / nickel hydroxide composite material. The method comprises that oxidized graphene, water, hexamethylene tetramine and a nickel source are mixed, heated and reacted to obtain the graphene / nickel hydroxide composite material. A simple hydrothermal method is used to synchronize generation of nanometer nickel hydroxide with reduction of oxidized graphene, two-phase combination is carried out in source and microscopic levels, and the composite material in which nanometer nickel hydroxide is attached to the sheet-shaped graphene uniformly is prepared. The composite material combines the advantages that graphene has a large specific surface area and high conductivity with that nanometer nickel hydroxide is high in the specific capacity, and the composite material has high integrated performance when being used for a super capacitor.

Description

technical field [0001] The invention relates to the technical field of electrode materials, in particular to a graphene / nickel hydroxide composite material, a preparation method thereof and an electrode material. Background technique [0002] As a new type of energy storage element, supercapacitors combine the characteristics of electrostatic capacitors and chemical batteries, and have the advantages of high power density, good cycle performance and no pollution to the environment. Therefore, supercapacitors are widely used in energy recovery, capacitor cars It is a technology with great application prospects in fields such as instrumentation and instrumentation. [0003] The electrode material is the core of the energy storage element, and the phase composition and microstructure of the material determine the physical and chemical properties of the material. A large specific surface area can not only produce a considerable electric double layer capacitance, but also provid...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/86
CPCY02E60/13H01G11/24H01G11/30H01G11/36H01G11/86
Inventor 李乾乾钟宽林炳辉王文华刘洪明
Owner GREE ELECTRIC APPLIANCES INC
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