Rational hybrid modulation of P, N dual-doped holey graphene for high-performance supercapacitors

Masoud Nazarian-Samani, Safa Haghighat-Shishavan, Mahboobeh Nazarian-Samani, Myeong Seong Kim, Byung Won Cho, Si Hyoung Oh, Seyed Farshid Kashani-Bozorg, Kwang Bum Kim

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

A P, N dual-doped holey graphene (PNHG) material is prepared by a scalable, facile synthetic approach, using a mixture of glucose, dicyandiamide (DCDA), and phosphoric acid (H3PO4). H3PO4 successfully functions as an “acid catalyst” to encourage the uniform breakage of C=C bonds to create large, localized perforations over the graphene monolith. Further acid treatment and annealing introduce in-plane holes. The correlation between the capacitance of the PNHG and its structural parameters during the fabrication process is comprehensively evaluated. A thermally induced sp2→sp3 transformation occurs at high temperatures because of the substantial loss of graphitic sp2-type carbons, together with a dramatic reduction in capacitance. The target PNHG-400 electrode material delivers exceptionally high gravimetric capacitance (235.5 F g−1 at 0.5 A g−1), remarkable rate capability (84.8% at 70 A g−1), superior capacitance retention (93.2 and 92.7% at 10 and 50 A g−1 over 25000 cycles, respectively), and acceptable volumetric capacitance due to moderate density, when it is used with organic electrolytes in the voltage range between 0 and 3 V. These results suggest a pioneering defect-engineered strategy to fabricate dual-doped holey graphene with valuable structural properties for high-performance electric double layer supercapacitors, which could be used in next-generation energy storage applications.

Original languageEnglish
Pages (from-to)286-296
Number of pages11
JournalJournal of Power Sources
Volume372
DOIs
Publication statusPublished - 2017 Dec 31

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

Nazarian-Samani, M., Haghighat-Shishavan, S., Nazarian-Samani, M., Kim, M. S., Cho, B. W., Oh, S. H., Kashani-Bozorg, S. F., & Kim, K. B. (2017). Rational hybrid modulation of P, N dual-doped holey graphene for high-performance supercapacitors. Journal of Power Sources, 372, 286-296. https://doi.org/10.1016/j.jpowsour.2017.10.087