Porous composite carbon material and application thereof

A technology of composite carbon and porous activated carbon, which is applied in the direction of nano-carbon, carbon compound, hybrid capacitor electrodes, etc., can solve the problems of short life and low power density, and achieve low internal resistance, long life of energy density, and good electrical performance.

Active Publication Date: 2013-09-11
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, conductive polymers doped with carbon nanotubes, and carbon nanotube materials loaded with noble metal oxides, but there are still certain defects to be solved, such as low power density and short lifespan.

Method used

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  • Porous composite carbon material and application thereof
  • Porous composite carbon material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Select 50kg of porous activated carbon with a specific surface area of ​​2000m 2 / g, the pore size distribution is 2-5nm.

[0056] (2) Select 9.7kg of porous thin-layer graphene with a thickness of 1.2nm and a specific surface area of ​​1200m 2 / g.

[0057] (3) Mix the aforementioned porous activated carbon and porous thin-layer graphene, add 180kg of water and 5kg of sodium carboxymethylcellulose; mechanically stir for 5 hours, and dry at 100°C for 12 hours to obtain a porous composite carbon material in a dry powder state. Such as figure 1 shown.

Embodiment 2

[0059] The porous activated carbon in Example 1 was mixed with the porous thin-layer graphene, 180 kg of water and 5 kg of sodium carboxymethyl cellulose were added; ultrasonic treatment was performed for 3 hours, and then dried at 100° C. for 12 hours to obtain a porous carbon composite material in a dry powder state.

Embodiment 3

[0061] Select the porous activated carbon in Example 1 and mix the porous thin-layer graphene, add 180kg of water and 5kg of sodium carboxymethylcellulose; mechanically stir for 5 hours, and dry at -40°C for 12 hours to obtain a porous composite carbon material in a dry powder state.

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Abstract

The invention discloses a porous composite carbon material and application thereof. The porous composite carbon material comprises 0.01wt-99.9wt% of porous thin-layer graphene, porous activated carbon and 0.01wt-20wt% of conductive agent. The porous composite carbon material can be used for manufacturing a supercapacitor comprising a positive electrode and a negative electrode, and at least one of the positive and negative electrodes comprises 0wt-100wt% of the porous composite carbon material. The porous composite carbon material has good electric performance and the supercapacitor manufactured by the porous composite carbon material has the advantages of low internal resistance, high power density and energy density, long service life and the like.

Description

technical field [0001] The invention particularly relates to a porous composite carbon material and its application, such as the application as a material for supercapacitors. technical background [0002] Supercapacitor (supercapacitor, ultracapacitor), also known as electrical double layer capacitor (Electrical Doule-Layer Capacitor), electrochemical capacitor (Electrochemcial Capacitor, EC), gold capacitor, farad capacitor, stores energy through polarized electrolyte. A supercapacitor can be viewed as two non-reactive porous electrode plates suspended in an electrolyte. When electricity is applied to the plates, the positive plate attracts negative ions in the electrolyte, and the negative plate attracts positive ions, effectively forming two capacitive storage The separated positive ions are near the negative plate, and the negative ions are near the positive plate. The supercapacitor stores energy by forming an electric double layer structure of electrolyte ions on the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/36H01G11/68C01B31/04C01B31/08C01B32/182C01B32/30
CPCY02E60/13
Inventor 刘立伟廖书田李伟伟郭玉芬陈明亮吴丽琼徐建宝龚佑品
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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