NDLI: Microwave synthesis of hierarchically porous activated carbon from lignite for high performance supercapacitors

Content Provider	Springer Nature Link
Author	Xing, Baolin Huang, Guangxu Chen, Lunjian Guo, Hui Zhang, Chuanxiang Xie, Wei Chen, Zhengfei
Copyright Year	2015
Abstract	A hierarchically porous activated carbon (HPAC) with high surface area (3064 m$^{2}$/g) and large pore volume (2.319 cm$^{3}$/g) was prepared from lignite using KOH as activation agent by microwave heating. Nitrogen adsorption–desorption at −196 °C, X-ray diffraction, scanning electron microscope, transmission electron microscope and X-ray photoelectron spectroscopy were used to characterize the HPAC. Because of its high surface area, macro–meso–micro hierarchically porous structure and oxygen-enriched surface, the HPAC exhibits excellent electrochemical performance in terms of specific capacitance, energy density and cycling stability as electrode material for supercapacitors. The HPAC showed a high specific capacitance of 390 F/g in aqueous electrolyte at a current density of 50 mA/g and 94.1 % of the initial specific capacitance was retained after 2000 cycles. Furthermore, this HPAC displayed a high specific capacitance of 198 F/g in an organic electrolyte.
Starting Page	67
Ending Page	73
Page Count	7
File Format	PDF
ISSN	13802224
Journal	Journal of Porous Materials
Volume Number	23
Issue Number	1
e-ISSN	15734854
Language	English
Publisher	Springer US
Publisher Date	2015-08-20
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Lignite Hierarchically porous activated carbon Electrode materials Supercapacitors Catalysis Characterization and Evaluation of Materials Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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