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Method for preparing micropore carbon material of super capacitor

A technology of supercapacitor and microporous carbon is applied in the field of preparation of supercapacitor electrode materials, which can solve the problems of lack of micropores, poor power output characteristics, and low specific energy.

Inactive Publication Date: 2011-11-16
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among many porous carbon materials, the electrochemical capacitive performance of ordinary activated carbon and high specific surface area activated carbon is not ideal, especially the poor power output characteristics
This is because activated carbon contains too many micropores, and the pores are long, the pores cannot be well connected, and the diffusion resistance of electrolyte ions in the activated carbon pores is too large.
Other carbon materials, such as carbon gels, carbon nanotubes, and ordered mesoporous carbons, have large pore sizes and good power output characteristics, but these carbon materials lack micropores, which is not conducive to the formation of an electric double layer. Small specific capacitance value, low specific energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 5 g of HY molecular sieves were vacuum activated at 150° C. for 6 hours. Cool to room temperature, add 8 mL of furan methanol for vacuum impregnation, filter, wash with toluene, and dry at room temperature. Place the dried mixture at 80°C for 24 hours, then raise the temperature to 150°C, N 2 Stand under protection for 8 hours to obtain molecular sieve / polyfuranmethanol complex. N 2 Under protection, the obtained composite was heated up and carbonized, and when it was raised to 800°C, the N 2 The flow was switched to acetonitrile vapor and N at a volume ratio of 5:95 2 The mixed gas was kept at this temperature for vapor deposition for 4 hours. A molecular sieve / microporous carbon composite is obtained. The molecular sieve / microporous carbon composite is fully washed twice with 10wt% HF acid and concentrated hydrochloric acid respectively, then fully washed with deionized water, and dried to obtain the microporous carbon electrode material. N 2 The adsorption / des...

Embodiment 2

[0016] 5 g of HY molecular sieves were vacuum activated at 150° C. for 6 hours. Cool to room temperature, add 8 mL of furan methanol for vacuum impregnation, filter, wash with toluene, and dry at room temperature. Place the dried mixture at 80°C for 24 hours, then raise the temperature to 150°C, N 2 Stand under protection for 8 hours to obtain molecular sieve / polyfuranmethanol complex. N 2 Under protection, the obtained composite was heated up and carbonized, and when it was raised to 900°C, the N 2 The flow was switched to acetonitrile vapor and N at a volume ratio of 5:95 2 The mixed gas was kept at this temperature for vapor deposition for 4 hours. A molecular sieve / microporous carbon composite is obtained. The molecular sieve / microporous carbon composite is fully washed twice with 10wt% HF acid and concentrated hydrochloric acid respectively, then fully washed with deionized water, and dried to obtain the microporous carbon electrode material. N 2 The adsorption / des...

Embodiment 3

[0018] 5 g of NaY molecular sieves were vacuum activated at 150° C. for 6 hours. Cool to room temperature, add 8 mL of furan methanol for vacuum impregnation, filter, wash with toluene, and dry at room temperature. Place the dried mixture at 80°C for 24 hours, then raise the temperature to 150°C, N 2 Stand under protection for 8 hours to obtain molecular sieve / polyfuranmethanol complex. N 2 Under protection, the obtained composite was heated up and carbonized, and when it was raised to 800°C, the N 2 The flow was switched to acetonitrile vapor and N at a volume ratio of 5:95 2 The mixed gas was kept at this temperature for vapor deposition for 4 hours. A molecular sieve-microporous carbon composite is obtained. The molecular sieve / microporous carbon composite is fully washed twice with 10wt% HF acid and concentrated hydrochloric acid respectively, then fully washed with deionized water, and dried to obtain the microporous carbon electrode material. N 2 The adsorption / de...

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Abstract

The invention relates to a method for preparing a micropore carbon electrode material of a super capacitor. The method mainly comprises the following steps: (1) soaking an activated zeolite molecular sieve in furfuryl alcohol in vacuum, filtering, and washing with toluene, airing at the room temperature, and placing for 24 hours at the temperature of 80 DEG C, and for 8 hours at the temperature of 150 DEG C under the protection of N2 to obtain a molecular sieve / poly-furfuralcohol compound; (2) under the protection of N2, carbonizing the molecular sieve / poly-furfuralcohol compound by heating; when the temperature rises to a set temperature, switching a N2 flow to precipitation gas immediately; performing vapor deposition for several hours to obtain a molecular sieve / micropore carbon compound; and (3) washing the molecular sieve / micropore carbon compound twice by using HF acid and concentrated hydrochloric acid respectively, then washing by using deionized water and drying to obtain micropore carbon electrode material. The micropore carbon material prepared by the invention has large specific surface area; a pore structure is an anti-structure of the molecular sieve; and good communication is formed among pore canals. The micropore carbon material has higher specific capacitance value and better power output characteristics.

Description

technical field [0001] The invention relates to a preparation method of a supercapacitor electrode material, in particular to a method for preparing a microporous carbon electrode material by a vacuum impregnation-vapor phase deposition two-step method. Background technique [0002] Supercapacitor is a new type of energy storage device between traditional capacitors and secondary batteries, and has the characteristics of both traditional capacitors and secondary batteries. The specific energy of supercapacitors is 20-200 times that of traditional capacitors, and its power density is an order of magnitude higher than that of secondary batteries. Minor drawback. In addition, it also has excellent characteristics such as wide operating temperature range, no pollution, long cycle life, and miniaturization, and has broad application prospects in the field between rechargeable batteries and traditional capacitors. As a backup power supply, supercapacitors have been widely used i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/058C01B31/02H01G11/86
CPCY02E60/13
Inventor 邢伟禚淑萍周晋司维江高秀丽李文
Owner SHANDONG UNIV OF TECH
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