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A kind of CE/C composite material, its preparation method and its application

A technology of adhesives and conductive polymers, applied in the field of Ce/C composite materials, can solve the problems of low capacitance and energy density

Inactive Publication Date: 2020-10-20
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The electrode material is the most important factor determining the performance of supercapacitors. The current commercial supercapacitors are mainly carbon materials with high specific surface area. This material mainly stores electric energy based on the principle of electric double layer and has a very high cycle life. However, the capacitance The energy density is relatively low, and there is still a certain distance from the requirements of practical applications

Method used

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  • A kind of CE/C composite material, its preparation method and its application
  • A kind of CE/C composite material, its preparation method and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) the Ce(OH) 4 After mixing evenly with activated carbon at a mass ratio of 1:5, add 50ml of deionized water, stir and react in a water bath for 12 hours, move the above liquid to a hydrothermal reaction kettle, react at 200°C for 2 days, filter and wash, and dry spare;

[0028] (2) Take 0.850g of Ce(OH) prepared by step (1) with an electronic balance 4 / Activated carbon composite material;

[0029] (3) Take by weighing 0.106g conductive polymer and the adhesive of equal quality therewith with electronic balance;

[0030] (4) Ce(OH) obtained by step (2) and step (3) 4 / Activated carbon composite material, conductive polymer and adhesive are mixed in a mass ratio of 8:1:1, after adding ethanol, stir with a mixer for 1-3 hours;

[0031] (5) the homogeneous liquid of step (4) gained is evenly coated on the nickel foam with a coating machine;

[0032] (6) Put the nickel foam obtained in step (5) into a heating box and dry it at 300° C. for 8 hours;

[0033] (7) Af...

Embodiment 2

[0038] (1) Mix cerium hydroxide and activated carbon evenly at a mass ratio of 1:3, add 50ml of deionized water, stir and react in a water bath for 12 hours, then transfer the above liquid to a hydrothermal reaction kettle, and react at 200°C for 3 days , after being filtered and washed, dried for later use;

[0039] (2) take by weighing 2.10g cerium hydroxide / activated carbon composite material prepared through step (1) with electronic balance;

[0040] (3) Take by weighing 0.350g conductive polymer and the adhesive of equal quality therewith with electronic balance;

[0041] (4) the cerium hydroxide / activated carbon composite material, conducting polymer and binding agent weighed by step (2) and step (3) are mixed in the ratio of 6: 1: 1 with mass ratio, after adding ethanol, use Stir with a mixer for 2h;

[0042] (5) the homogeneous liquid of step (4) gained is evenly coated on the nickel foam with a coating machine;

[0043] (6) Put the nickel foam obtained in step (5) ...

Embodiment 3

[0048] (1) the Ce(OH) 4 After the graphene is mixed evenly according to the mass ratio of 1:5, add 20ml of deionized water, stir and react in a water bath for 8 hours, move the above liquid to a hydrothermal reaction kettle, react at 300°C for 2 days, and filter and wash , dry for later use;

[0049] (2) Take 2.10g of Ce(OH) prepared by step (1) with an electronic balance 4 / graphene composite material;

[0050] (3) Take by weighing 0.106g conductive polymer and the adhesive of equal quality therewith with electronic balance;

[0051] (4) Ce(OH) obtained by step (2) and step (3) 4 / Graphene composite material, conductive polymer and adhesive are mixed in the ratio of 6:1:1 in mass ratio, after adding ethanol, stir with mixer for 1h;

[0052] (5) the homogeneous liquid of step (4) gained is evenly coated on the nickel foam with a coating machine;

[0053] (6) Put the nickel foam obtained in step (5) into a heating box and dry it for 12 hours at 200°C;

[0054] (7) After th...

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Abstract

The invention provides a Ce / C composite material, which comprises a Ce compound and a C material, wherein the Ce compound is selected from CeS2, Ce(OH)3 or Ce(OH)4, and the C material is selected from graphene or activated carbon. The Ce / C composite material prepared according to a hydrothermal method is used as a supercapacitor electrode material, thereby not only having good electrochemical performance, but also having high specific capacitance and long service life. The experiment results show that the Ce / C composite material prepared by using the hydrothermal method acts as a supercapacitor electrode material, the specific capacitance can reach up to 20-1000F / g; and the specific capacitance is still kept above 97% after 3000 times of constant-current charging and discharging.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and in particular relates to a Ce / C composite material, its preparation method and its application. Background technique [0002] With the rapid development of the economy, problems such as energy shortage and environmental pollution have also emerged. Electrochemical supercapacitors, referred to as supercapacitors, have broad application prospects in power systems as a new type of energy storage device. As a new energy storage component, supercapacitors have the advantages of high energy density of batteries and high power density of electrolytic capacitors, long cycle life, high energy storage efficiency, fast charge and discharge speed, good high and low temperature performance, and environmental friendliness, with excellent energy storage potential. . [0003] The electrode material is the most important factor determining the performance of supercapacitors. The current commercial s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/34H01G11/36H01G11/86H01G11/48
CPCH01G11/30H01G11/34H01G11/36H01G11/48H01G11/86Y02E60/13
Inventor 韩颖慧刘云鹏李雪
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)