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Activated Carbon Prepared from Lignite as Supercapacitor Electrode Materials
Author(s) -
Li Lijun,
Wang Xiaoyan,
Wang Shujuan,
Cao Zhenzhu,
Wu Zhaojun,
Wang Hong,
Gao Yanfang,
Liu Jinrong
Publication year - 2016
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201500532
Subject(s) - supercapacitor , activated carbon , electrochemistry , materials science , electrolyte , carbon fibers , capacitance , specific surface area , electrode , chemical engineering , current density , horizontal scan rate , bet theory , chemistry , cyclic voltammetry , adsorption , catalysis , composite material , composite number , organic chemistry , engineering , physics , quantum mechanics
Activated carbon derived from lignite is investigated as the active electrode material in supercapacitors. ZnCl 2 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°) shows the maximum specific capacitance of 207.5 F g −1 in 6 M KOH electrolytes at 0.5 A g −1 . The activated carbon presents good cycle stability during 3,000 cycles at a fair current density of 5 A g −1 and capacity rate can reach 91 %, because of its specific surface area of 1024 m 2 g −1 .