Highly Stable Performance of Supercapacitors from Phosphorus-Enriched Carbons

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• 作者：Denisa Hulicova-Jurcakova ; Alexander M. Puziy ; Olga I. Poddubnaya ; Fabian Surez-Garc&#237 ; a ; Juan M. D. Tascn ; Gao Qing Lu
• 刊名：Journal of the American Chemical Society
• 出版年：2009
• 出版时间：April 15, 2009
• 年：2009
• 卷：131
• 期：14
• 页码：5026-5027
• 全文大小：137K
• 年卷期：v.131,no.14(April 15, 2009)
• ISSN：1520-5126

文摘

Phosphorus-rich microporous carbons (P-carbons) prepared by a simple H₃PO₄ activation of three different carbon precursors exhibit enhanced supercapacitive performance in 1 M H₂SO₄ when highly stable performance can be achieved at potentials larger than the theoretical decomposition potential of water. This ability of P-carbons greatly enhances the energy density of supercapacitors that are capable of delivering 16 Wh/kg compared to 5 Wh/kg for the commercial carbon. An intercept-free multiple linear regression model confirms the strongest influence of phosphorus on capacitance together with micropores 0.65−0.83 nm in width that are the most effective in forming the electric double layer.