Citation: GUO Bing-Lin, HOU Cai-Xia, FAN Li-Hua, SUN Zhang. Effect of Extraction Temperature on Hyper-coal Structure and Electrochemistry of Coal-Based Activated Carbon[J]. Chinese Journal of Inorganic Chemistry, ;2018, 34(9): 1615-1624. doi: 10.11862/CJIC.2018.201 shu

Effect of Extraction Temperature on Hyper-coal Structure and Electrochemistry of Coal-Based Activated Carbon

GUO Bing-Lin ¹ ,
HOU Cai-Xia ^1,2,, ,
FAN Li-Hua ^1,2 ,
SUN Zhang ^1,2

1.
College of Chemical Engineering, North China University of Science and Technology, Tangshan, Hebei 063210, China
2.
Coal Chemical Engineering Research Center of Hebei Province, Tangshan, Hebei 063210, China

Corresponding author: HOU Cai-Xia, caixiasmile@163.com
Received Date: 16 April 2018
Revised Date: 14 June 2018

Figures(13)

The Inner Mongolia lignite was used to prepare hyper-coal(HPC) at different temperatures by N-methylpyrolidone during KOH extraction. To explore the effect of extraction temperatures on activated carbons(ACs), the activation was operated at the same condition, m_KOH:m_coal=3:1 and activated at 650℃ for 2 hours. The results show that the extraction temperature of HPC has great effect on the electrochemical properties of HPC-based ACs. Comparing the ash contents, surface oxo-functional groups, the specific surface areas, pore structures and electrochemical performances of the corresponding ACs with the lignite, the HPC prepared at 330℃ is in possession of the most suitable reactivity and its specific surface area of corresponding ACs could reach 1 252 m²·g^-1 with appropriate amount of surface oxo-function groups. Besides, the specific capacitor could still retain almost 90% in 3 mol·L^-1 KOH electrolyte at 50 mA·g^-1 reaching 322 F·g^-1, and a capacity retention as high as near 90% was achieved at 2 000 mA·g^-1.
- hyper-coal,
- activated carbon,
- extraction temperature,
- supercapacitor,
- activated
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