Journal
JOURNAL OF POWER SOURCES
Volume 357, Issue -, Pages 41-46Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2017.04.108
Keywords
Coal; Coal tar; Preparation; Carbon; Porous nanosheets; Supercapacitor
Funding
- National Natural Science Foundation of China [U1508201, U1361110, 51272004]
- Program for New Century Excellent Talents of the Education Ministry of China [NCET-13-0643]
- Provincial Innovative Group for Processing & Clean Utilization of Coal Resource
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A hydroxide-template strategy coupled with in-situ chemical activation is reported for the first time to fabricate porous carbon nanosheets (PCNSs) from coal tar. The thin PCNSs feature abundant short pores accessible for fast ion transport and high specific surface area up to 3235 m(2) g(-1) for ion adsorption. As electrodes for supercapacitors, the PCNSs show a high capacitance of 296.2 F g(-1) at 0.05 A g(-1) in 6 M KOH electrolyte, an excellent rate performance with a capacitance of 220.7 F g(-1) at 20 A g(-1) and a superior cycle stability with over 97.2% capacitance retention after 11000 charge-discharge cycles at 3.5 A g(-1). This work paves a new way for efficient fabrication of sheet-like carbon materials with tuned porous structure from polycyclic aromatic hydrocarbons for high performance supercapacitors. (C) 2017 Elsevier B.V. All rights reserved.
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