Molecular engineering of supercapacitor electrodes with monodispersed N-doped carbon nanoporous spheres

Xinhua Huang, Nuoya Wang, Fei Li, Xingxing Zhu, Kin Liao, Vincent Chan, Lidong Zhang

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Herein, a novel polytriazine compound was designed and used as a precursor for the synthesis of high nitrogen-doped porous carbon spheres (N-doped carbon-PNSs) by direct carbonization-activation; the process was simple and based on the template-free polycondensation of 2,6-diaminopyridine and formaldehyde in an aqueous solution. Moreover, by varying the 2,6-diaminopyridine to formaldehyde ratio and total monomer concentration during the synthesis of the polymeric precursor, the size of the polytriazine nanospheres could be tuned from 102 to 3900 nm with a uniform spherical geometry. After pyrolysis, the N-doped carbon-PNSs had an average N content of 8.7-10.4 wt% and surface areas of 627.8-924.4 m2 g-1; most importantly, the N-doped carbon-PNSs as high energy supercapacitor electrodes exhibited excellent cyclability and high specific capacitance, ramping up to 424 F g-1 at 1 A g-1 in 6 M KOH.

Original languageBritish English
Pages (from-to)15892-15898
Number of pages7
JournalNew Journal of Chemistry
Volume43
Issue number40
DOIs
StatePublished - 2019

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