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Preparation method of nickel oxide/three-dimensional structured graphene composite material

A composite material and graphene technology, applied in nanotechnology, structural parts, electrochemical generators, etc. for materials and surface science, can solve the problem of not fundamentally improving the performance of nickel oxide/three-dimensional structure graphene composite materials, Difficult to industrial application, low yield and other issues, to achieve good cycle stability, easy industrial mass production, high yield effect

Active Publication Date: 2018-01-19
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chemical vapor deposition (CVD) is a common method for preparing three-dimensional graphene, but the method has high cost and low yield, and is difficult to be applied industrially, and the simple mixing of nickel oxide and three-dimensional graphene cannot fundamentally improve Properties of Nickel Oxide / Stereostructured Graphene Composite

Method used

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  • Preparation method of nickel oxide/three-dimensional structured graphene composite material
  • Preparation method of nickel oxide/three-dimensional structured graphene composite material
  • Preparation method of nickel oxide/three-dimensional structured graphene composite material

Examples

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Effect test

Embodiment 1

[0037] A preparation method of lithium ion battery nickel oxide / three-dimensional structure graphene negative electrode material, comprising the steps of:

[0038] (1) The PKS polymer is first pretreated, washed, and dried;

[0039] (2) The PKS polymer after pretreatment is joined in the nickel chloride solution of 2.0mol / L, suction filtration after mixing and stirring for 12h, removes filtrate;

[0040] (3) Add a certain amount of potassium hydroxide to the PKS polymer exchanged with nickel ions in the step (2) according to the mass ratio of 1:1, then add a certain amount of deionized water to make the potassium hydroxide just dissolve, stir and mix evenly, drying;

[0041] (4) heating the substance obtained in step (3) to 850° C. under a nitrogen atmosphere at a heating rate of 10° C. / min, and keeping the temperature constant for 2 hours;

[0042] (5) The obtained substance after heat treatment in the step (4) is washed several times with deionized water to remove impuriti...

Embodiment 2

[0046] A preparation method of lithium ion battery nickel oxide / three-dimensional structure graphene negative electrode material, comprising the steps of:

[0047] (1) 0017 strongly acidic styrene-based cation exchange resin is first pretreated, washed, and dried;

[0048] (2) 0017 strongly acidic styrene series cation exchange resin after pretreatment is joined in the nickel sulfate solution of 1.0mol / L, suction filtration after mixing and stirring for 10h, removes filtrate;

[0049] (3) Add a certain amount of potassium hydroxide to the 0017 strongly acidic styrene-based cation exchange resin exchanged with nickel ions in step (2) at a mass ratio of 1:1, and then add a certain amount of deionized water to make the potassium hydroxide just Dissolve, stir and mix evenly, and dry;

[0050] (4) The substance obtained in step (3) is heated to 1000° C. under an argon atmosphere at a heating rate of 10° C. / min, and kept at a constant temperature for 4 hours;

[0051] (5) The obta...

Embodiment 3

[0055] A preparation method of lithium ion battery nickel oxide / three-dimensional structure graphene negative electrode material, comprising the steps of:

[0056] (1) D001 strong acid cation exchange resin is firstly pretreated, washed and dried;

[0057] (2) D001 strong acid cation exchange resin after pretreatment is joined in the nickel acetate solution of 1mol / L, suction filtration after mixing and stirring for 10h, removes filtrate;

[0058] (3) Add a certain amount of calcium hydroxide to the D001 strong acid cation exchange resin exchanged with nickel ions in step (2) according to the mass ratio of 1:1, then add a certain amount of deionized water to dissolve the calcium hydroxide, stir and mix uniform, dry;

[0059] (4) The substance obtained in step (3) is heated to 900° C. at a heating rate of 5° C. / min under a helium atmosphere, and kept at a constant temperature for 3 hours;

[0060] (5) The obtained material after heat treatment in step (4) is washed several ti...

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Abstract

The invention belongs to the technical field of a lithium ion battery, and specifically relates to a method for applying a nickel oxide / three-dimensional structured graphene composite material into anegative electrode material of a lithium ion battery. By taking a polymer as a carbon source and a nickel salt as a catalyst, complete mixing with a pore forming agent is performed and then the mixture is calcined in a tubular furnace; the product is washed by water to remove the residual pore-forming agent and the like, and then suction filtration and drying are performed to obtain the nanometernickel metal granule / three-dimensional structured graphene composite material; and the material is subjected to a hydrothermal reaction and subsequent heat treatment to obtain the nickel oxide / three-dimensional structured graphene composite material. According to the prepared nickel oxide / three-dimensional structured graphene composite material, the material conductivity and structural stability are greatly improved; meanwhile, the material has high rate capability and cycle stability; and the nickel oxide / three-dimensional structured graphene composite material prepared in the invention is large in specific surface, high in yield, simple in process, and large-scale industrial production can be realized easily, so that the composite material is a very good negative electrode of the lithiumion battery.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a method for applying a nickel oxide / three-dimensional structure graphene composite material to a negative electrode material of a lithium-ion battery. Background technique [0002] As the consumption of fossil fuels continues to increase, it brings some inevitable problems, such as environmental pollution, energy shortage, greenhouse effect and so on. Therefore, it is imminent to develop new energy sources and efficient energy storage device technologies. Lithium-ion batteries are considered to be one of the most promising energy storage systems, and are widely used in household appliances and portable electronic devices due to their high conversion efficiency, high energy density, and safety. At present, graphite is mainly used commercially as the anode material of lithium-ion batteries, because graphite has the characteristics of low cost, stable per...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/52H01M4/583H01M10/0525B82Y30/00
CPCY02E60/10
Inventor 沈培康史外鹏张颖朦乔斯凯
Owner GUANGXI UNIV
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