Well-Defined N/S Co-Doped Nanocarbons from Sulfurized PAN- b-PBA Block Copolymers: Structure and Supercapacitor Performance

Rui Yuan, Han Wang, Mingkang Sun, Krishnan Damodaran, Eric Gottlieb, Maciej Kopeć, Karoline Eckhart, Sipei Li, Jay Whitacre, Krzysztof Matyjaszewski, Tomasz Kowalewski

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

While nanocarbons doped with more than one heteroatom continue attracting growing interest owing to a wide range of applications, precise control of their nanostructure and porosity remains a major challenge. Herein, we report a new route to synthesize N/S co-doped nanocarbons with precise porosity control through introduction of sulfur into the synthesis copolymer-templated nitrogen-enriched carbons (CTNC). Sulfur served as both a heteroatom source and morphology stabilizing agent. The produced N/S co-doped nanocarbons showed interconnected pores with relatively high specific surface area (∼480 m2/g) and high heteroatom content (N, 8.2 atom %; S, 8.8 atom %). To demonstrate the dual benefits of sulfur stabilization (incorporation of heteroatoms and improved morphology control), such prepared nanocarbons were fabricated into supercapacitors with geometric capacitance (50 μF/cm2), well above the value observed for single N-doped carbon (33 μF/cm2). Importantly, linear relationship of mesopore size with block length of copolymer precursor was observed for N/S co-doped nanocarbons, allowing optimization of the mesopore size for supercapacitor applications. This new technique not only expands CTNC method from N-doping to N/S co-doping systems with excellent porosity control but also opens up new possibilities widely applicable to other PAN-based soft-templating systems. ©

Original languageEnglish
Pages (from-to)2467-2474
Number of pages8
JournalACS Applied Nano Materials
Volume2
Issue number4
Early online date5 Mar 2019
DOIs
Publication statusPublished - 26 Apr 2019

Keywords

  • copolymer-templated nitrogen-enriched carbons (CTNC)
  • porosity control
  • structure
  • sulfur stabilization
  • supercapacitor

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Yuan, R., Wang, H., Sun, M., Damodaran, K., Gottlieb, E., Kopeć, M., Eckhart, K., Li, S., Whitacre, J., Matyjaszewski, K., & Kowalewski, T. (2019). Well-Defined N/S Co-Doped Nanocarbons from Sulfurized PAN- b-PBA Block Copolymers: Structure and Supercapacitor Performance. ACS Applied Nano Materials, 2(4), 2467-2474. https://doi.org/10.1021/acsanm.9b00340