Activated carbon derived from melaleuca barks for outstanding high-rate supercapacitors

作者：Luo, Qiu-Ping; Huang, Liang; Gao, Xiang; Cheng, Yongliang; Yao, Bin; Hu, Zhimi; Wan, Jun; Xiao, Xu; Zhou, Jun^*

来源：Nanotechnology, 2015, 26(30): 304004.

DOI：10.1088/0957-4484/26/30/304004

• activated carbon
• carbonization
• melaleuca barks
• high-rate
• supercapacitor

Activated carbon (AC) was prepared via carbonizing melaleuca bark in an argon atmosphere at 600 degrees C followed with KOH activation for high-rate supercapacitors. This AC electrode has a high capacitance of 233 F g(-1) at a scan rate of 2 mV s(-1) and an excellent rate capability of similar to 80% when increasing the sweep rate from 2 to 500 mV s(-1). The symmetric supercapacitor assembled by the above electrode can deliver a high energy density of 4.2 Wh kg(-1) with a power density of 1500Wkg(-1) when operated in the voltage range of 0-1V in 1 M H2SO4 aqueous electrolyte while maintaining great cycling stability (less than 5% capacitance loss after 10 000 cycles at sweep rate of 100 mV s(-1)). All the outstanding electrochemical performances make this AC electrode a promising candidate for potential energy storage application.

• 出版日期2015-7-31
• 单位华中科技大学