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A kind of high rate porous carbon electrode material for supercapacitor and its preparation method

A technology for supercapacitors and carbon electrodes, which is applied in the fields of hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, carbon preparation/purification, etc. Capacitor electrode materials and other issues, to achieve the effect of high specific surface area and excellent rate performance

Active Publication Date: 2017-11-17
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, activated carbon has the disadvantage of low mesoporosity, which is not conducive to the transport of electrolyte ions in it, so it is not suitable as an electrode material for high-rate supercapacitors.

Method used

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  • A kind of high rate porous carbon electrode material for supercapacitor and its preparation method
  • A kind of high rate porous carbon electrode material for supercapacitor and its preparation method
  • A kind of high rate porous carbon electrode material for supercapacitor and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 2.23g Zn(NO 3 ) 2 ·6H 2 O, 0.12g Co(NO 3 ) 2 ·6H 2 O and 0.6g of 2-methylimidazole were dissolved in 180ml of N,N-dimethylformamide. Then the mixed solution was placed in a hydrothermal kettle, and hydrothermally treated at 140° C. for 24 h. The hydrothermal product was washed with N,N-dimethylformamide solution for more than 3 times, and then the product was dried in an oven at 60°C. The dried product was carbonized at 800 °C for 3 h in a nitrogen atmosphere. The obtained carbonized product was treated with potassium hydroxide solution, and then the treated sample was washed with deionized water until neutral. After the above product was treated with hydrochloric acid solution, it was washed with deionized water until neutral. The cleaned product was dried in an oven at 60° C. for 24 hours to obtain hierarchical porous carbon.

[0028] Physical adsorption tests show that the carbon material presents a concentrated pore size distribution at 1.3nm and 5.1nm (suc...

Embodiment 2

[0030] 2.11g Zn(NO 3 ) 2 ·6H 2 O, 0.23g Co(NO 3 ) 2 ·6H 2 O and 0.6g of 2-methylimidazole were dissolved in 180ml of N,N-dimethylformamide, and then the mixed solution was placed in a hydrothermal kettle for hydrothermal treatment at 140°C for 24h. The hydrothermal product was washed with N,N-dimethylformamide solution for more than 3 times, and then the product was dried in an oven at 60°C. The dried product was carbonized at 800° C. for 3 h in a nitrogen atmosphere. After the carbonized product was treated with potassium hydroxide solution, it was washed with deionized water until neutral. Then the obtained sample was treated with hydrochloric acid solution and washed with deionized water. The cleaned samples were dried in an oven at 60° C. for 24 h to obtain hierarchical porous carbon.

[0031] The physical adsorption results show that the carbon material has a concentrated pore size distribution at 1.2nm and 1.8nm, and the results are as follows image 3 shown. T...

Embodiment 3

[0033] 1.87g Zn(NO 3 ) 2 ·6H 2 O, 0.47g Co(NO 3 ) 2 ·6H 2O and 0.6g of 2-methylimidazole were dissolved in 180ml of N,N-dimethylformamide, and then the mixed solution was placed in a hydrothermal kettle for hydrothermal treatment at 140°C for 24h. The hydrothermal product was washed with N,N-dimethylformamide solution for more than 3 times, and then the product was dried in an oven at 60°C. The dried product was carbonized at 800° C. for 3 h in a nitrogen atmosphere. After the carbonized product was treated with potassium hydroxide solution, it was washed with deionized water until neutral. Then the obtained sample was treated with hydrochloric acid solution and washed with deionized water. The cleaned samples were dried in an oven at 60° C. for 24 h to obtain hierarchical porous carbon.

[0034] The physical adsorption results show that the carbon material has a concentrated pore size distribution at 1.2nm and 5.0nm, and the results are as follows Figure 5 shown. T...

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Abstract

The invention relates to a hierarchical porous carbon suitable for supercapacitor electrode materials and a preparation method thereof. The method for preparing the hierarchical porous carbon is characterized by: firstly preparing the zeolite imidazole compound containing zinc and cobalt, and then subjecting it to carbonization treatment at high temperature to obtain the hierarchical porous carbon. There are a large number of mesopores and micropores in the porous carbon, and the pore size distribution is graded. The formation of this structure is beneficial to the transport of electrolyte ions in the porous carbon material and the formation of the electric double layer. Supercapacitors using hierarchical porous carbon as electrode active material exhibit excellent rate performance. The specific capacitance of the hierarchical porous carbon material obtained by carbonizing the zeolite imidazole compound with a molar ratio of cobalt and zinc of 1:9 at 800 ° C reaches 176 F / g at a scan rate of 100 mV / s.

Description

technical field [0001] The invention belongs to the technical field of electrode materials for supercapacitors, in particular to a porous carbon electrode material for supercapacitors and a preparation method thereof. The electrode material has the characteristics of hierarchical distribution of pore diameters. Background technique [0002] A supercapacitor is a new type of energy storage device between traditional physical capacitors and secondary batteries. Supercapacitors have the advantages of high energy density, long cycle life, and fast charging and discharging, so they have broad application prospects in the fields of mobile electronic devices and electric vehicles, and have received extensive research and attention in recent years. [0003] Supercapacitors are divided into two types according to their working principles, namely electric double layer capacitors and pseudocapacitors. Activated carbon has become an electrode material widely used in commercial supercap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/86C01B32/05
CPCY02E60/13
Inventor 阎景旺姜靓高兆辉李然衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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