Synthesis of porous carbons from coal tar pitch for high-performance supercapacitors

WEI Feng; ZHANG Han-fang; HE Xiao-jun; MA Hao; DONG Shi-an; XIE Xiao-yu

doi:10.1016/S1872-5805(19)60006-5

Volume 34 Issue 2

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Article Navigation > New Carbon Mater. > 2019 > 34(2): 132-139

WEI Feng, ZHANG Han-fang, HE Xiao-jun, MA Hao, DONG Shi-an, XIE Xiao-yu. Synthesis of porous carbons from coal tar pitch for high-performance supercapacitors. New Carbon Mater., 2019, 34(2): 132-139. doi: 10.1016/S1872-5805(19)60006-5

Citation:

WEI Feng, ZHANG Han-fang, HE Xiao-jun, MA Hao, DONG Shi-an, XIE Xiao-yu. Synthesis of porous carbons from coal tar pitch for high-performance supercapacitors. New Carbon Mater., 2019, 34(2): 132-139. doi: 10.1016/S1872-5805(19)60006-5

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Synthesis of porous carbons from coal tar pitch for high-performance supercapacitors

doi: 10.1016/S1872-5805(19)60006-5

School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China

Funds: National Natural Science Foundation of China (U1361110, U1508201 and U1710116).

Received Date: 2019-02-03
Accepted Date: 2019-04-30
Rev Recd Date: 2019-03-31
Publish Date: 2019-04-28

Abstract

Abstract

Porous carbons (PCs) for supercapacitors were synthesized by a combined Mg(OH)₂ templating and in-situ KOH activation method using coal tar pitch as the carbon precursor, and were characterized by TEM, Raman spectroscopy, XPS and N₂ adsorption. Their electrochemical properties were investigated by galvanostatic charge-discharge, electrochemical impedance spectroscopy and cyclic voltammetry. Results show that the specific surface area of the PCs increases with the KOH dosage and exhibits a maximum with an activation temperature at 800℃. The optimum PC has a high surface area up to 3145 m² g^-1 with abundant micropores, and exhibits a high specific capacitance of 272 F g^-1 at 0.05 A g^-1, a rate capability of 217 F g^-1 at 20 A g^-1 and a good cycle stability with a 96.69% capacitance retention after 10000 cycles in a 6 M KOH electrolyte. This work provides a simple method for the large-scale production of PCs from pitch-based carbon sources for high-performance supercapacitors.
- Coal tar pitch,
- Porous carbon,
- Supercapacitor

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References(43)

References

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