Enhanced Electric Double Layer Capacitance of Graphite Oxide Intercalated by Poly(sodium 4-styrensulfonate) with High Cycle Stability

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• 作者：Hae-Kyung Jeong ; Meihua Jin ; Eun Ju Ra ; Kyeu Yoon Sheem ; Gang Hee Han ; Sivaram Arepalli ; Young Hee Lee
• 刊名：ACS Nano
• 出版年：2010
• 出版时间：February 23, 2010
• 年：2010
• 卷：4
• 期：2
• 页码：1162-1166
• 全文大小：320K
• 年卷期：0
• ISSN：1936-086X

文摘

We propose a new material for high power and high density supercapacitors with excellent cycle stability. Graphite oxide (PSS−GO) intercalated with poly(sodium 4-styrensulfonate) showed high performance of electric double layer capacitance (EDLC) compared to that of the pristine graphite oxide. Specific capacitance of the PSS−GO reached 190 F/g, and the energy density was much improved to 38 Wh/kg with a power density of 61 W/kg. Cycle test showed that the specific capacitance decreased by only 12% after 14860 cycles, providing excellent cyclic stability. The high EDLC performance of PSS−GO composite was attributed to the wide interlayer distance and simple pore structures accommodating fast ion kinetics.