Preparation of an electrochemically modified graphite electrode and its electrochemical performance for pseudo-capacitors in a sulfuric acid electrolyte

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• 作者：Haibo Xu ; Xinzhuang Fan ; Yonghong Lu ; Lian Zhong ; Xiangfeng Kong ; Jia Wang
• 刊名：Carbon
• 出版年：2010
• 出版时间：September 2010
• 年：2010
• 卷：48
• 期：11
• 页码：3300-3303
• 全文大小：669 K

文摘

A graphite electrode was activated using recurrent electrochemical galvanic pulses. After activation, the original smooth surface was changed into an obviously porous, rough surface with microcrystalline flake structures with a larger number of O-containing functional groups. The material had a high capacitance and a satisfactory high-rate performance. The superior volumetric capacitance in active layer was ca. 428 F cm⁻³. Eighty-eight percentage of the capacitance remained after the discharge current increased from 2 mA (1.71 F cm⁻²) to 100 mA (1.50 F cm⁻²) in 2.3 M H₂SO₄.