An integrated strategy towards the facile synthesis of core-shell SiC-derived carbon@N-doped carbon for high-performance supercapacitors

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Zhongya Pang
  • Guangshi Li
  • Xingli Zou
  • Chenteng Sun
  • Conghui Hu
  • Wei Tang
  • Li Ji
  • Qian Xu
  • Xionggang Lu

Detail(s)

Original languageEnglish
Pages (from-to)512-521
Journal / PublicationJournal of Energy Chemistry
Volume56
Online publishedMay 2021
Publication statusPublished - May 2021

Abstract

Porous active core-shell carbon material with excellent synergistic effect has been regarded as a prospective material for supercapacitors. Herein, we report an integrated method for the facile synthesis of carbide-derived carbon (CDC) encapsulated with porous N-doped carbon (CDC@NC) towards high-performance supercapacitors. Polydopamine (PDA) as nitrogen and carbon sources was simply coated on SiC nanospheres to form SiC@PDA, which was then directly transformed into CDC@NC via a one-step molten salt electro-etching/in-situ doping process. The synthesized CDC@NC with hierarchically porous structure has a high specific surface area of 1191 m2 g−1. The CDC core and NC shell are typical amorphous carbon and more ordered N-doped carbon, respectively. Benefitting from its unique dual porous structures, the CDC@NC demonstrates high specific capacitances of 255 and 193 F g−1 at 0.5 and 20 A g−1, respectively. The reaction mechanism of the electro-etching/in-situ doping process has also been investigated through experimental characterizations and theoretical density functional theory calculations. It is suggested that the molten salt electro-etching/in-situ doping strategy is promising for the synthesis of active core-shell porous carbon materials with synergistic properties for supercapacitors without the need for additional doping/activation processes.

Research Area(s)

  • Core-shell structure, Electrochemical etching, In-situ nitrogen doping, Molten salt, Porous carbon, Supercapacitors

Citation Format(s)

An integrated strategy towards the facile synthesis of core-shell SiC-derived carbon@N-doped carbon for high-performance supercapacitors. / Pang, Zhongya; Li, Guangshi; Zou, Xingli; Sun, Chenteng; Hu, Conghui; Tang, Wei; Ji, Li; Hsu, Hsien-Yi; Xu, Qian; Lu, Xionggang.

In: Journal of Energy Chemistry, Vol. 56, 05.2021, p. 512-521.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review