- Title
- Microwave synthesis of hierarchically porous activated carbon from lignite for high performance supercapacitors
- Creator
- Xing, Baolin; Huang, Guangxu; Chen, Lunjian; Guo, Hui; Zhang, Chuanxiang; Xie, Wei; Chen, Zhengfei
- Relation
- Journal of Porous Materials Vol. 23, Issue 1, p. 67-73
- Publisher Link
- http://dx.doi.org/10.1007/s10934-015-0056-0
- Publisher
- Springer
- Resource Type
- journal article
- Date
- 2016
- Description
- A hierarchically porous activated carbon (HPAC) with high surface area (3064 m²/g) and large pore volume (2.319 cm³/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.
- Subject
- lignite; hierarchically porous activated carbon; electrode materials; supercapacitors
- Identifier
- http://hdl.handle.net/1959.13/1319844
- Identifier
- uon:23986
- Identifier
- ISSN:1380-2224
- Language
- eng
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