点击次数：
论文类型：期刊论文
发表时间：2016-02-01
发表刊物：ELECTROCHIMICA ACTA
收录刊物：SCIE、EI、ESI高被引论文
卷号：190
页面范围：1134-1141
ISSN号：0013-4686
关键字：Prawn shells; nitrogen-doped; activated carbon; supercapacitors
摘要：Nitrogen doped activated carbons have been fabricated by simultaneous carbonization and KOH activation of chitosan biomass regenerated from prawn shell at high temperature. Sufficient porosity with high content of nitrogen heteroatom makes them very appealing for charge storage in supercapacitors. Specifically, the activated carbon obtained at 700 degrees C shows excellent capacitive performance in both acidic and alkaline electrolyte in virtue of the optimized combination of electronic double-layer capacitance and pseudo-capacitance. It exhibits high specific capacitance of 695 F g (1) in 1 M H2SO4 and 357 F g (1) in 6 M KOH at a current density of 50 mA g (1). Even cycled at high current density of 5 A g (1), high capacitance of over 280 F g 1 can be still retained in both electrolytes. Stable capacitance retention over 95% for as long as 5000 cycles is also achieved at 1 A g (1) in both cases. (C) 2016 Elsevier Ltd. All rights reserved.