N-doped carbon foam based three-dimensional electrode architectures and asymmetric supercapacitors

Jie Wang, Laifa Shen, Ping Nie, Xiaoliang Yun, Yunling Xu, Hui Dou, Xiaogang Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)

Abstract

Improving the electrochemical performance of supercapacitors mainly depends on the electrode design and system construction. A new kind of additive-free asymmetric supercapacitors (ASCs) has been successfully fabricated using a self-supported carbon foam/ordered mesoporous carbon (CF-OMC) film as the negative electrode and free-standing CF-NiCo2O4 nanosheets (NSs) as the positive electrode, respectively. The highly conductive three-dimensional (3D) CF framework could facilitate electron transfer while the porous thin film of OMC and ultrathin NiCo2O4 nanosheets could shorten the ion diffusion path and facilitate the rapid migration of electrolyte ions. The optimized asymmetric supercapacitors could work with an operational voltage of 1.6 V, delivering a high energy density (∼47.8 W h kg-1), high power density (∼9800 W kg-1 at 17.7 W h kg-1) and outstanding cycle stability (∼10 000 times). This research may pave the way for fabricating lightweight, low-cost, and high-performance electrodes for energy storage applications.

Original languageEnglish
Pages (from-to)2853-2860
Number of pages8
JournalJournal of Materials Chemistry A
Volume3
Issue number6
DOIs
Publication statusPublished - 2015 Feb 14
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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