Fluorinated activated carbon with superb kinetics for the supercapacitor application in nonaqueous electrolyte

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• 作者：Mok-Hwa Kim ; Jung-Hoon Yang ; Yong-Mook Kang ; Sun-Min Park ; Joong Tark Han ; Kwang-Bum Kim ; Kwang Chul Roh
• 关键词：Activated carbon ; Fluorination ; Supercapacitor ; Kinetics ; Non-aqueous electrolyte
• 刊名：Colloids and Surfaces A: Physicochemical and Engineering Aspects
• 出版年：20 February, 2014
• 年：2014
• 卷：443
• 期：Complete
• 页码：535-539
• 全文大小：1434 K

文摘

Fluorinated activated carbon (F-AC) exhibits significantly improved electrochemical capacitive performance compared to raw activated carbon (R-AC). F-AC electrode shows a specific capacitance coming up to 19.8 F cm^鈭?, whereas the capacitance of R-AC electrode is 18.4 F cm^鈭?. Besides, the kinetic enhancement of F-AC is also memorable. This phenomenon indicates that F-AC tends to form electric double-layer ions on its surface more rapidly than does R-AC. This formation is a result of the increased electrical conductivity attributed to the semi-ionic bonding character between fluorine and activated carbon. The electrochemical improvement of F-AC proves that fluorination is a very effective method for providing greater possibilities for supercapacitor applications of AC in nonaqueous electrolytes.