Effect of electrochemical treatment in H₂SO₄ aqueous solution on carbon material derived from cellulose with added guanidine phosphate

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• 作者：Toshiki Tsubota ; ^{tsubota@che.kyutech.ac.jp} ; Chuanshu Wang ; Naoya Murakami ; Teruhisa Ohno
• 关键词：Electrochemical capacitor ; Cellulose ; Bamboo ; Electrochemical activation ; Guanidine phosphate
• 刊名：Journal of Power Sources
• 出版年：2013
• 出版时间：1 March, 2013
• 年：2013
• 卷：225
• 期：Complete
• 页码：150-156
• 全文大小：892 K

文摘

The electrochemical treatment in a 1 M H₂SO₄ aqueous solution is applied to the carbon material synthesized from cellulose mixed with guanidine phosphate. The capacitance value increased by the addition of guanidine phosphate; furthermore, the value significantly increased by the electrochemical treatment and was higher than 350 F g^?1 at 50 mA g^?1. The process used in this study, that is, removing the lignin from wood waste products, such as bamboo, and then mixing with guanidine phosphate before the heat treatment followed by an electrochemical treatment, should be of benefit for the synthesis of a high performance material for the electrodes of electrochemical capacitors. The significant enhancement of the capacitance value appears in the range of 1.5 V¡«2.8 V vs. Ag/AgCl for the applied maximum voltage. This voltage range is consistent with the voltage for the significant enhancement of the current value in the CV curve. The change in the capacitance value should be related to the electrochemical reaction of the water electrolysis. The XPS data indicated that the concentrations of both the N atom and the O atom on the surface increased after the electrochemical process.