期刊
MATERIALS LETTERS
卷 173, 期 -, 页码 72-75出版社
ELSEVIER
DOI: 10.1016/j.matlet.2016.03.031
关键词
Activated carbon; Chitosan; Activation; Electrochemical capacitor; Capacitance
资金
- Ministry of Science and Education (Poland) [3787/E-138/S/2014]
Porous carbon was prepared through KOH activation of a chitosan - a nitrogen rich precursor. The porosity and surface area strongly depend on the temperature of activation. Different electrolytes were tested to select the most suitable one for electrochemical capacitors with obtained activated carbon as electrode material, and the acidic medium, i.e. 1 M H2SO4 was chosen. The activated carbon prepared with the temperature of activation standing at 750 degrees C exhibits the largest specific surface area and capacitance of 295 F g(-1) at a current density of 0.1 A g(-1) in the acidic medium. Moreover, the activated carbon from chitosan shows good rate capability and excellent cycling stability (almost 99% capacitance retention over 5000 cycles). (C) 2016 Elsevier B.V. All rights reserved.
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