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A method for preparing composite material, composite material and application thereof

A composite material and graphite foam technology, applied in the field of materials, can solve the problems of poor stability and low specific capacitance of metal oxides

Active Publication Date: 2017-07-18
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 carbon materials as electrode materials is low, while the stability of metal oxides as electrode materials is poor

Method used

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  • A method for preparing composite material, composite material and application thereof
  • A method for preparing composite material, composite material and application thereof
  • A method for preparing composite material, composite material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The mass percent of embodiment 1 nickel hydroxide nanowire is the preparation of the composite material of 85%

[0029] (1) Calcining sucrose and ammonium chloride at a molar ratio of 1:2 at 1000°C under an argon atmosphere for 2 hours to obtain foamed graphite with a three-dimensional porous structure.

[0030] (2) foamed graphite was added in the potassium hydroxide solution of 7mol / L (mass ratio 0.1, the quality of the potassium hydroxide in the potassium hydroxide solution is 10 times of the quality of foamed graphite) and stirred for 4 hours, left standstill for 20 After a small hour, it was filtered and dried at 60°C for 24 hours to obtain activated foam graphite.

[0031] (3) Activated foamed graphite and mixed acid (volume ratio: sulfuric acid: nitric acid = 1:1) were acidified under ultrasonic for 2 hours, and acidified foamed graphite was obtained after washing and drying.

[0032] (4) Acidified foamed graphite is added to nickel sulfate solution (mass ratio ...

Embodiment 2

[0034] Preparation of embodiment 2 composite material

[0035] (1) Calcining sucrose and ammonium chloride at a molar ratio of 2.5:1 at 1500°C under an argon atmosphere for 5 hours to obtain foamed graphite with a three-dimensional porous structure.

[0036] (2) The foamed graphite was added to potassium hydroxide solution (mass ratio 1) and stirred for 4 hours, filtered after standing for 20 hours, and dried at 60° C. for 24 hours to obtain activated foamed graphite.

[0037](3) Activated graphite foam and mixed acid (sulfuric acid: nitric acid = 3:1) were acidified under ultrasonic for 5 hours, and acidified graphite foam was obtained after washing and drying.

[0038] (4) Add the acidified foamed graphite into the nickel sulfate solution (mass ratio 0.03) and mix to form a uniform suspension, maintain vigorous stirring and slowly add the solution of sodium hydroxide (nickel sulfate and sodium hydroxide mol ratio is 3) dropwise to in the suspension. Hydrothermal treatment ...

Embodiment 3

[0040] The mass percent of embodiment 3 nickel hydroxide nanowires is the preparation of the composite material of 30%

[0041] (1) Calcining sucrose and ammonium chloride at a molar ratio of 1:2 at 1500°C under an argon atmosphere for 2 hours to obtain foamed graphite with a three-dimensional porous structure.

[0042] (2) The foamed graphite was added to potassium hydroxide solution (mass ratio 1) and stirred for 4 hours, filtered after standing for 20 hours, and dried at 60° C. for 24 hours to obtain activated foamed graphite.

[0043] (3) Activated foam graphite and mixed acid (sulfuric acid: nitric acid = 3:1) were acidified under ultrasonic for 2 hours, and acidified foam graphite was obtained after washing and drying.

[0044] (4) The acidified foamed graphite is added into the nickel sulfate solution (mass ratio 0.82) and mixed to form a uniform suspension, and the sodium hydroxide (nickel sulfate and sodium hydroxide mol ratio is 1) solution is slowly added dropwise u...

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Abstract

The invention provides a method for preparation of a composite material. The method comprises the following steps that S1, foamy graphite with a three-dimensional porous structure is provided; S2, the foamy graphite is added to a potassium hydroxide solution to be activated, and then is washed and dried, so that activated foamy graphite is obtained; S3, the activated foamy graphite is added to mixed acid to be acidized under the ultrasonic condition, and then is washed and dried, so that acidized foamy graphite is obtained; S4, the acidized foamy graphite is added to a nickel sulfate solution to form uniform suspension liquid through mixing, a precipitating agent is slowly and dropwise added to the suspension liquid, and is washed and dried after hydro-thermal processing is accomplished, so that the composite material made of the foamy graphite and nickel hydroxide nanowires is obtained. The invention further provides the composite material prepared through the method for preparation of the composite material, and application of the composite material serving as an electrode material to a capacitor. All in all, the method for preparation of the composite material is simple in process, easy to control and beneficial to large-scale production, and the provided composite material has high specific capacitance and excellent cycle stability when the composite material serves as the electrode material.

Description

technical field [0001] The present invention relates to a material, and more particularly relates to a method for preparing a composite material, the composite material and applications thereof. Background technique [0002] With climate warming and environmental pollution increasing day by day, people gradually began to seek renewable new energy sources other than fossil energy, such as solar energy, wind energy and biomass energy, etc., which has become a research hotspot all over the world. High-performance energy storage equipment is the premise for human society to effectively utilize these renewable new energy sources, so it has attracted much attention. [0003] As a new type of energy storage element, supercapacitors have higher energy density than traditional capacitors, higher power density than traditional batteries, short charging time, long service life and low maintenance costs. Advantages, the application prospect is very broad. [0004] According to the pri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/30H01G11/24H01G11/26
CPCY02E60/13
Inventor 周静红陈阳张梓澜隋志军刘芝婷周兴贵
Owner EAST CHINA UNIV OF SCI & TECH
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