A kind of high rate supercapacitor composite electrode material and preparation method thereof

A supercapacitor and composite electrode technology, applied in capacitors, electrolytic capacitors, circuits, etc., can solve the problems of long time consumption, carbon source environmental pollution, etc., achieve the effects of rich sources, improved conductivity, and increased specific capacitance

Active Publication Date: 2016-01-20
ZHANGJIAGANG IND TECH RES INST CO LTD DALIAN INST OF CHEM PHYSICS CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sol-gel process it adopts takes a long time, and the carbon source seriously pollutes the environment.

Method used

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  • A kind of high rate supercapacitor composite electrode material and preparation method thereof
  • A kind of high rate supercapacitor composite electrode material and preparation method thereof
  • A kind of high rate supercapacitor composite electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The particle size of the graphite powder is not limited, and graphite powder over 325 mesh is preferred. The specific process of oxidizing the graphite powder is: uniformly dispersing the graphite powder and sodium nitrate powder into a sulfuric acid solution. Specifically, 5g graphite and 2.5g sodium nitrate powder of 325 mesh can be added to 130ml of concentrated sulfuric acid to form a mixture, and the mixture is further stirred to obtain uniformly dispersed graphite and sodium nitrate powder, the stirring time varies, can for 2h. Note that this process has been completed in an ice bath or an ice-water bath to prevent the mixture from being overheated; in the sulfuric acid solution uniformly dispersed with graphite powder and sodium nitrate powder, slowly add potassium permanganate powder to form a suspension, The adding speed is controlled by controlling the adding time, specifically adding 15g of potassium permanganate powder within 2h to avoid explosion due to vi...

Embodiment 2

[0058] The particle size of the graphite powder is not limited, and graphite powder over 325 mesh is preferred. The specific process of oxidizing the graphite powder is: uniformly dispersing the graphite powder and sodium nitrate powder into a sulfuric acid solution. Specifically, 5g graphite and 2.5g sodium nitrate powder of 325 mesh can be added to 130ml of concentrated sulfuric acid to form a mixture, and the mixture is further stirred to obtain uniformly dispersed graphite and sodium nitrate powder, the stirring time varies, can for 2h. Note that this process has been completed in an ice bath or ice-water bath to prevent the temperature of the mixture from being too high; slowly add potassium permanganate powder to the sulfuric acid solution dispersed with graphite powder and sodium nitrate powder to form a suspension , the adding speed is controlled by controlling the adding time, specifically adding 15g of potassium permanganate powder within 2h to avoid explosion due t...

Embodiment 3

[0065]The particle size of the graphite powder is not limited, and graphite powder over 325 mesh is preferred. The specific process of oxidizing the graphite powder is: uniformly dispersing the graphite powder and sodium nitrate powder into a sulfuric acid solution. Specifically, 5g graphite and 2.5g sodium nitrate powder of 325 mesh can be added to 130ml of concentrated sulfuric acid to form a mixture, and the mixture is further stirred to obtain uniformly dispersed graphite and sodium nitrate powder, the stirring time varies, can for 2h. Note that this process has been completed in an ice bath or ice-water bath to prevent the temperature of the mixture from being too high; slowly add potassium permanganate powder to the sulfuric acid solution dispersed with graphite powder and sodium nitrate powder to form a suspension , the adding speed is controlled by controlling the adding time, specifically adding 15g of potassium permanganate powder within 2h to avoid explosion due to...

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PUM

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Abstract

The invention relates to a high-magnification supercapacitor composite electrode material and a preparation method thereof. The composite electrode material is obtained by H-bond action between an oxygen-containing group of a graphene oxide and an oxygen-containing group of a carbohydrate, graphene is wrapped on the surface of activated carbon particles at the microscopic scale, and the high-magnification supercapacitor composite electrode material is of a spongy porous structure on the whole. The material disclosed by the invention is prepared by high-temperature activation, so that the structure is stable; and as the electrode material of a supercapacitor, the activated carbon / graphene composite material prepared by adopting the method disclosed by the invention shows more excellent magnification performance in comparison with the traditional activated carbon.

Description

technical field [0001] The invention relates to the technical field of electrochemical supercapacitors, in particular to a high-rate supercapacitor composite electrode material and a preparation method thereof. Background technique [0002] Supercapacitors have the advantages of high power density, wide operating temperature range, and long cycle life. They have great application value and market potential in the fields of renewable energy utilization, transportation, electric power, communications, and national defense. In particular, the rise of wind power, photovoltaic power generation and electric vehicles has made the research and development of supercapacitors, a new energy storage technology, more and more important. [0003] According to the energy storage mechanism, supercapacitors can be divided into electrochemical double layer capacitors, electrochemical quasicapacitors and hybrid supercapacitors. Electrochemical electric double layer capacitors mainly use the e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/042
CPCY02E60/13
Inventor 阎景旺姜磊郝立星薛荣衣宝廉
Owner ZHANGJIAGANG IND TECH RES INST CO LTD DALIAN INST OF CHEM PHYSICS CHINESE ACADEMY OF SCI
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