Template-induced self-activation route for nitrogen-doped hierarchically porous carbon spheres for electric double layer capacitors

Hongshuai Guo, Bing Ding, Jie Wang, Yadi Zhang, Xiaodong Hao, Langyuan Wu, Yufeng An, Hui Dou, Xiaogang Zhang

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

The synthesis of highly nitrogen-doped hierarchical carbon spheres (NPCS) is reported. The NPCS with pomegranate-like nanostructure were prepared by the CaCO3 spheres template-induced self-activation route with dopamine as the carbon precursor. The template-induced self-activation mechanism was carefully investigated by controlling experiment conditions and thermogravimetric analyses combined with mass spectrometry. Under the optimized conditions, the as-prepared NPCS demonstrate large specific area (up to 1984 m2 g−1) and high level of nitrogen (N, 7.57%) doping. Electrochemical evaluations indicate that the energy density of NPCS-based EDLC devices can reach 6.2 and 14.4 Wh kg−1 in 6 M KOH electrolyte and aqueous concentrated electrolyte (5 M LiTFSI), respectively. This work provides a novel approach for preparing nanoporous carbon materials with hierarchical porosity and well-defined nanostructure.

Original languageEnglish
Pages (from-to)204-210
Number of pages7
JournalCarbon
Volume136
DOIs
Publication statusPublished - 2018 Sep
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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