Wood-based activated carbons for supercapacitor electrodes with a sulfuric acid electrolyte

Aleksandrs Volperts; Galina Dobele; Aivars Zhurinsh; Darya Vervikishko; Evgeny Shkolnikov; Jurijs Ozolinsh

doi:10.1016/S1872-5805(17)60125-2

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Article Navigation > New Carbon Mater. > 2017 > 32(4): 319-326

Aleksandrs Volperts, Galina Dobele, Aivars Zhurinsh, Darya Vervikishko, Evgeny Shkolnikov, Jurijs Ozolinsh. Wood-based activated carbons for supercapacitor electrodes with a sulfuric acid electrolyte. New Carbon Mater., 2017, 32(4): 319-326. doi: 10.1016/S1872-5805(17)60125-2

Citation:

Aleksandrs Volperts, Galina Dobele, Aivars Zhurinsh, Darya Vervikishko, Evgeny Shkolnikov, Jurijs Ozolinsh. Wood-based activated carbons for supercapacitor electrodes with a sulfuric acid electrolyte. New Carbon Mater., 2017, 32(4): 319-326. doi: 10.1016/S1872-5805(17)60125-2

Citation:

Aleksandrs Volperts, Galina Dobele, Aivars Zhurinsh, Darya Vervikishko, Evgeny Shkolnikov, Jurijs Ozolinsh. Wood-based activated carbons for supercapacitor electrodes with a sulfuric acid electrolyte. New Carbon Mater., 2017, 32(4): 319-326. doi: 10.1016/S1872-5805(17)60125-2

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Wood-based activated carbons for supercapacitor electrodes with a sulfuric acid electrolyte

doi: 10.1016/S1872-5805(17)60125-2

1.
Latvian State Institute of Wood Chemistry, 27 Dzerbenes St., LV-1006, Riga, Latvia;
2.
Scientific Association for High Temperatures, Russian Academy of Sciences, 13/2 Izhorskaya St., 125412 Moscow, Russia;
3.
Riga Technical University, Faculty of Material Science and Applied Chemistry 14/24, āzenes Street, LV-1048, Riga, Latvia

Funds: Authors express gratitude to project ERAF 2OP/2.11.10/14/APIA/VIAA/050.

Received Date: 2017-05-29
Accepted Date: 2017-08-31
Rev Recd Date: 2017-08-03
Publish Date: 2017-08-28

Abstract

Abstract

Wood-based activated carbons were synthesized in a two-stage thermochemical process using sodium hydroxide as an activator, and used as the electrode materials for supercapacitors with a sulfuric acid electrolyte. The dependence of pore structure parameters and the electrochemical properties of the activated carbons on the synthesis conditions was investigated. Results indicate that an electric double layer is formed within micropores while meso and macropores are responsible for ion transport. Excess activation under a high activation temperature and/or a high mass ratio of sodium hydroxide to carbonaceous material leads to high meso and macropore volumes, which increase electrolyte uptake and therefore decrease the specific capacitance based on cell mass. The optimum activated carbon is obtained at an activation temperature of 600℃ with a mass ratio of sodium hydroxide to carbonaceous material of 1.25.
- Activated carbons,
- Porous structure,
- Thermochemical activation,
- Alkali activation,
- Supercapacitors

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References(45)

References

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