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Foamed nickel composite material, and preparation method and application thereof

A composite material and nickel foam technology, applied in the field of electrochemical materials, can solve the problems of low specific capacitance and cannot meet the requirements of practical applications, achieve excellent pseudocapacitance, facilitate mass production, and reduce electrode resistance.

Inactive Publication Date: 2015-11-18
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific capacitance of the material prepared by the above method is still far lower than the theoretical value, which cannot meet the requirements of practical application.

Method used

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  • Foamed nickel composite material, and preparation method and application thereof
  • Foamed nickel composite material, and preparation method and application thereof
  • Foamed nickel composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation of embodiment 1 foamed nickel composite material

[0027] (1) Dissolve 0.01 g graphene oxide GO and 10 g surfactant sodium dodecylbenzene sulfonate in a mixed solution of 150 g methanol and 3 g water, and ultrasonically form a uniform graphene oxide suspension.

[0028] (2) Dissolving 0.81 mol of nickel nitrate and 0.27 mol of cobalt chloride in the graphene oxide suspension and stirring for 20 min to obtain a uniform suspension.

[0029] (3) Sonicate 1cm×1cm nickel foam with acetone, 0.01M hydrochloric acid, deionized water and absolute ethanol for 5 minutes respectively.

[0030] (4) Pour the homogeneous suspension described in (2) into a hydrothermal kettle, then immerse foamed nickel into the suspension, and react at 100° C. for 12 hours. After the reaction is finished, the nickel foam with graphene and nickel-cobalt hydroxide layered hydrotalcite-like growth is taken out, washed and dried to obtain a foamed nickel composite material with graphene a...

Embodiment 2

[0032] The preparation of embodiment 2 foam nickel composite material

[0033] (1) Dissolve 0.05 g of graphene oxide and 0.15 g of sodium dodecylsulfonate in a mixed solution of 75 g of methanol and 3 g of water, and ultrasonically form a uniform graphene oxide suspension.

[0034] (2) Dissolving 0.63 mol of nickel nitrate and 0.27 mol of cobalt chloride in the graphene oxide suspension and stirring for 20 min to obtain a uniform suspension.

[0035] (3) Sonicate 1cm×1cm nickel foam with acetone, 6M hydrochloric acid, deionized water and absolute ethanol for 30min respectively.

[0036] (4) Pour the homogeneous suspension described in (2) into a hydrothermal kettle, then immerse foamed nickel into the suspension, and react at 200° C. for 43 hours. After the reaction is finished, the nickel foam with graphene and nickel-cobalt hydroxide layered hydrotalcite-like growth is taken out, washed and dried to obtain a foamed nickel composite material with graphene and nickel-cobalt h...

Embodiment 3

[0037] The preparation of embodiment 3 foam nickel composite material

[0038] (1) Dissolve 0.05 g of graphene oxide and 1.5 g of sodium dodecylbenzenesulfonate in a mixed solution of 60 g of methanol and 20 g of water, and ultrasonically form a uniform graphene oxide suspension.

[0039] (2) Dissolve 0.39375 mol of nickel nitrate and 0.7875 mol of cobalt chloride in the graphene oxide suspension, and stir for 20 minutes to obtain a uniform suspension.

[0040] (3) Sonicate 1cm×1cm nickel foam for 30min with acetone, 3M hydrochloric acid, deionized water and absolute ethanol respectively.

[0041] (4) Pour the homogeneous suspension described in (2) into a hydrothermal kettle, then immerse foamed nickel into the suspension, and react at 180° C. for 30 h. After the reaction is finished, the nickel foam with graphene and nickel-cobalt hydroxide layered hydrotalcite-like growth is taken out, washed and dried to obtain a foamed nickel composite material with graphene and nickel-c...

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Abstract

The invention relates to a preparation method of a foamed nickel composite material. The method comprises the following steps that oxidized graphene and a surfactant are added to a water and methanol mixed solution, and ultrasonic processing is carried out to obtain a oxidized graphene solution; nickel nitrate and cobalt chloride are added into the oxidized graphene solution and stirred and mixed to form a uniform suspension; and the uniform suspension is poured into a hydro-thermal reactor kettle, foamed nickel is immersed into the suspension, solvothermal reaction is carried out at 100-200 DEG C, the oxidized graphene is changed to graphene by reduction while nickel and cobalt hydroxide is generated at the surface of the foamed nickel in situ, and thus, the foamed nickel composite material whose surface is covered with a graphene and nickel-cobalt hydrotalcite like layer is obtained. The invention also relates to the obtained foamed nickel composite material and application thereof. The preparation method is simple, easy to control and low in cost, and the obtained foamed nickel composite material which serves as electrode material of a super capacitor has higher specific capacitance and high cycle stability.

Description

technical field [0001] The present invention relates to an electrochemical material, and more specifically, to a method for preparing a foamed nickel composite material, the obtained foamed nickel composite material and applications thereof. Background technique [0002] The demand for energy in the world today mainly depends on chemical fuels, but chemical fuels are increasingly in short supply. People urgently need efficient, clean and recyclable new energy sources. So new renewable energy research is a hot spot. However, the utilization of renewable energy, such as wind energy, solar energy, etc., is seriously affected by seasonal, meteorological and geographical conditions. Therefore, the development of new energy storage devices is one of the key issues for the effective use of renewable energy. Scientists have successively developed different types of electrochemical energy storage devices, such as lithium-ion batteries, fuel cells, supercapacitors, etc. [0003] Su...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/26H01G11/32H01G11/86
Inventor 周静红张梓澜杨实润隋志军钱刚周兴贵
Owner EAST CHINA UNIV OF SCI & TECH
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