Electronic Supplementary Material (ESI) for Journal of Materials Chemistry A. This journal is © The Royal Society of Chemistry 2014 N-doped porous carbon capsules with tunable porosity for high-performance supercapacitors G.A. Ferrero, A. B. Fuertes, M. Sevilla* Instituto Nacional del Carbón (CSIC), P.O. Box 73, Oviedo 33080, Spain * Corresponding autor: [email protected] Supporting Information Specific Capacitance (F g-1) 200 150 100 50 0 N-CC N-carbon nanofibers  Ordered Templated N-doped N-rich N-doped mesoporous graphene mesoporous composite mesoporous carbon carbon of CNTs N-enriched sheets nanopipes carbon nanopipes   with nitrogen materials  species   CNTs/Nenriched carbon  Figure S1. Comparison of the gravimetric capacitance values at 1 A g-1 of the N-CC with those of nitrogen-doped carbons reported in the literature at low scan rates (1 mV s-1) / low discharge current (0.1 A g-1 or 1 A g-1) in H2SO4. The values of ref.  and  were measured in 6 M KOH electrolyte. 1-7 References 1 2 3 4 5 6 7 L.-F. Chen, X.-D. Zhang, H.-W. Liang, M. Kong, Q.-F. Guan, P. Chen, Z.-Y. Wu and S.-H. Yu, ACS Nano, 2012, 6, 7092-7102. W. Kim, J. B. Joo, N. Kim, S. Oh, P. Kim and J. Yi, Carbon, 2009, 47, 1407-1411. J. W. Lee, J. M. Ko and J.-D. Kim, Electrochim. Acta, 2012, 85, 459-466. W. Kim, M. Y. Kang, J. B. Joo, N. D. Kim, I. K. Song, P. Kim, J. R. Yoon and J. Yi, J. Power Sources, 2010, 195, 2125-2129. G. Lota, K. Lota and E. Frackowiak, Electrochem. Commun., 2007, 9, 1828-1832. E. Frackowiak, G. Lota, J. Machnikowski, C. Vix-Guterl and F. Béguin, Electrochim. Acta, 2006, 51, 2209-2214. F. Béguin, K. Szostak, G. Lota and E. Frackowiak, Adv. Mater., 2005, 17, 2380-2384.
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