基于硫酸为电解液的超级电容器木基活性炭电极材料的制备

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

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

基于硫酸为电解液的超级电容器木基活性炭电极材料的制备

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

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

详细信息

通讯作者:
Aleksandrs Volperts,E-mail:volperts@edi.lv

中图分类号: TQ127.1⁺1
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- 文章访问数: 411
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- 被引次数: 0
出版历程
- 收稿日期: 2017-05-29
- 录用日期: 2017-08-31
- 修回日期: 2017-08-03
- 刊出日期: 2017-08-28

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

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.

摘要

摘要: 以NaOH为活化剂，采用两步热化学过程制备出木基活性炭。将所制活性炭用作以硫酸为电解液的超级电容器电极材料。探讨了合成条件对活性炭孔结构和电化学性能。结果表明，在微孔中形成双电层电容，介孔和大孔则实现离子运输。在高的活化温度或高碱炭比下，材料被过度活化，导致高的介孔、大孔孔容，这增加了电解液的吸收，从而降低质量比电容。最佳的活性炭合成条件为，活化温度：600℃，碱炭比：1.25。
- 活性炭 /
- 孔结构 /
- 热化学活化 /
- 碱活化 /
- 超级电容器
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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