Preparation of HyperCoal-based activated carbons for electric double layer capacitor

HUANG Shan-shan; ZHAO Xiao-yan; XIE Feng-mei; CAO Jing-pei; WEI Xian-yong; TAKARADA Takayuki

Volume 42 Issue 05

May 2014

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Article Navigation > Journal of Fuel Chemistry and Technology > 2014 > 42(05): 539-544

HUANG Shan-shan, ZHAO Xiao-yan, XIE Feng-mei, CAO Jing-pei, WEI Xian-yong, TAKARADA Takayuki. Preparation of HyperCoal-based activated carbons for electric double layer capacitor[J]. Journal of Fuel Chemistry and Technology, 2014, 42(05): 539-544.

Citation:

HUANG Shan-shan, ZHAO Xiao-yan, XIE Feng-mei, CAO Jing-pei, WEI Xian-yong, TAKARADA Takayuki. Preparation of HyperCoal-based activated carbons for electric double layer capacitor[J]. Journal of Fuel Chemistry and Technology, 2014, 42(05): 539-544.

Citation:

HUANG Shan-shan, ZHAO Xiao-yan, XIE Feng-mei, CAO Jing-pei, WEI Xian-yong, TAKARADA Takayuki. Preparation of HyperCoal-based activated carbons for electric double layer capacitor[J]. Journal of Fuel Chemistry and Technology, 2014, 42(05): 539-544.

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Preparation of HyperCoal-based activated carbons for electric double layer capacitor

1.
School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou 221116, China;
2.
Division of Environmental Engineering Science, Gunma University, Kiryu 376-8515, Japan

Received Date: 2013-11-26
Rev Recd Date: 2014-02-15
Publish Date: 2014-05-30

Abstract

Abstract

Coal-based activated carbons (ACs) were prepared from HyperCoal using KOH and CaCO₃ as activating agent, and were used as electrode materials for electric double layer capacitor (EDLC) using 0.5 mol/L TEABF4/PC as the electrolytic solution. The porosity of the ACs was characterized using N₂ adsorption at 77 K. The effects of carbonization temperature, activation temperature, activation time and activating agent on the capacitance characteristic of ACs were investigated. The results show that the specific surface area and the specific capacitance decreased with the increase of carbonization temperature. A high activation temperature and a long activation time is not beneficial for the specific capacitance of EDLC. CaCO₃ significantly inhibited the porosity development during KOH activation and gave ACs with quite low specific surface area and specific capacitance. The ACs prepared at carbonization temperature of 500 ℃, activation temperature of 800 ℃, KOH/char ratio of 4 and activation time of 2 h reached a specific surface area of 2 540 m²/g and a total pore volume of 1.65 cm³/g and achieved the maximum specific capacitance of 46.0 F/g.
- HyperCoal,
- EDLC,
- activated carbon,
- specific surface area,
- capacitance

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References(18)

References

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