Citation: ZHONG Jia-Liang, GUO Feng-Jiao, MI Hong-Yu. Preparation and Electrochemical Capacitance Profile of Carrot-Based Porous Carbon[J]. Chinese Journal of Inorganic Chemistry, ;2015, (11): 2128-2134. doi: 10.11862/CJIC.2015.299 shu

Preparation and Electrochemical Capacitance Profile of Carrot-Based Porous Carbon

1.
Key Laboratory of Oil & Gas Fine Chemicals, Ministry of Education, Xinjiang University, Urumqi 830046, China

Corresponding author: MI Hong-Yu,
Received Date: 17 April 2015
Available Online: 14 September 2015
Fund Project: 新疆维吾尔自治区自然科学基金项目(No.2014211A015)资助项目。 (No.2014211A015)

Porous carbon materials were prepared from freeze-dried porous carrots as carbon sources through carbonization at 600 ℃ in nitrogen atmosphere, followed by KOH activation. The microstructures and capacitive properties of carbon materials were examined by FTIR, XRD, SEM, TEM, CV, CD and EIS. Electrochemical results indicated that, after being activated, porous carbon showed a significant improvement in specific surface area (from 7 m²·g^-1 to 147 m²·g^-1). Moreover, activated carbon displayed a maximum specific capacitance of 414 F·g^-1. Even when the current increased to 4 A·g^-1, its capacitance retention reached 74.5%. While non-activated carbon had only 253 F·g^-1 and 45.1% retention. Additionally, activated carbon exhibited high electrochemical stability with 94% retention after 8000 cycles. The remarkable improvement in capacitive performance was strongly related to the significant improvement of specific surface area and the increase of mesopore.
- porous carrots;porous carbon;KOH activation;capacitive properties
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沈阳化工大学材料科学与工程学院沈阳 110142