High-rate porous carbon electrode material for super capacitor and 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 excellent rate performance and high specific surface area

Active Publication Date: 2015-09-16
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, activated carbon has the disadvantage of low mesoporosity, which is not conducive to the transpor

Method used

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  • High-rate porous carbon electrode material for super capacitor and preparation method
  • High-rate porous carbon electrode material for super capacitor and preparation method
  • High-rate porous carbon electrode material for super capacitor and preparation method

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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 for preparing the electrode material of a super capacitor and a preparation method of the hierarchical porous carbon. The preparation method of the hierarchical porous carbon includes the following steps that: a zinc and cobalt-containing zeolite imidazole compound is prepared; and the zinc and cobalt-containing zeolite imidazole compound is subjected to carbonization treatment under high temperature, so that the hierarchical porous carbon can be obtained. A large number of mesopores and micropores exist in the porous carbon, and the bore diameters of the mesopores and micropores are distributed hierarchically. The formation of the above structure is conducive to the formation of the transmission of electrolyte ions in the porous carbon material and the formation of a double-electric layer. With the hierarchical porous carbon adopted as an electrode active material, the rate capability of the super capacitor is excellent; the zeolite imidazole compound is subjected to carbonization under 800 DEG C, the molar ratio of zinc and cobalt of the zeolite imidazole compound being 1:9, so that the hierarchical porous carbon of which the specific capacitance can achieve 176F/g under 100mV/s scanning speed can be obtained.

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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IPC IPC(8): H01G11/24H01G11/86C01B31/02
CPCY02E60/13H01G11/24C01B32/05H01G11/32H01G11/86
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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