Journal
ELECTROANALYSIS
Volume 28, Issue 1, Pages 243-248Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201500532
Keywords
Supercapacitor; Lignite; Zinc chloride; Activated carbon
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Funding
- National Natural Science Foundation of China [21266018, 21566030]
- Science and technology projects of Science and Technology Department of Inner Mongolia Autonomous Region, P. R. China [20110401, 20130409]
- Natural Science Foundation of Inner Mongolia, P. R. China [2010MS0218]
- Program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region [NJYT-15A04]
- Ministry of Science and Technology China-South Africa Joint Research Program [CS08-L15]
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Activated carbon derived from lignite is investigated as the active electrode material in supercapacitors. ZnCl2 was used as excitation agent during preparation process. XRD, BET, SEM and electrochemical performance testing carried out to characterize the structure and properties of activated carbon. Electrochemical investigations indicate that the activated carbon (AC-650 degrees) shows the maximum specific capacitance of 207.5Fg(-1) in 6M KOH electrolytes at 0.5Ag(-1). The activated carbon presents good cycle stability during 3,000 cycles at a fair current density of 5Ag(-1) and capacity rate can reach 91%, because of its specific surface area of 1024m(2)g(-1).
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