标题：High-performance Activated Carbons Prepared by KOH Activation of Gulfweed for Supercapacitors
作者：Li, Shijie; Han, Kuihua; Si, Pengchao; Li, Jinxiao; Lu, Chunmei
作者机构：[Li, Shijie; Han, Kuihua; Li, Jinxiao; Lu, Chunmei] Shandong Univ, Sch Energy & Power Engn, Jinan 250061, Shandong, Peoples R China.; [Si, Pengchao] 更多
通讯作者地址：[Han, KH]Shandong Univ, Sch Energy & Power Engn, Jinan 250061, Shandong, Peoples R China.
来源：INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
关键词：Gulfweed-based activated carbon; Specific surface area; Supercapacitors;; Electrochemical performance
摘要：Activated carbons with huge specific surface area and developed pore structure are prepared by KOH activation of gulfweed. Six kinds of gulfweed based activated carbons with different specific surface area are selected to investigate their electrochemical performance and the influence of specific surface area on the electrochemical performance. The electrochemical performance is investigated by galvanostatic charge discharge and cyclic voltammetry test. The highest gravimetric capacitance is demonstrated by AC3155, and the capacitance value reaches up to 395 F g(-1) at the current density 0.05 A g(-1) in 6 M KOH. Moreover, a slow fading of capacitance is observed as the current density increase. The capacitance retention is 92% after 10000 cycles at the current density 2.5 A g(-1). The gulfweed based activated carbons demonstrate both excellent high rate capacitive performance and cycle performance.