Flexible pillared graphene-paper electrodes for high-performance electrochemical supercapacitors

Gongkai Wang, Xiang Sun, Fengyuan Lu, Hongtao Sun, Mingpeng Yu, Weilin Jiang, Changsheng Liu, Jie Lian

Research output: Contribution to journalArticlepeer-review

248 Scopus citations

Abstract

Flexible graphene paper (GP) pillared by carbon black (CB) nanoparticles using a simple vacuum filtration method is developed as a high-performance electrode material for supercapacitors. Through the introduction of CB nanoparticles as spacers, the self-restacking of graphene sheets during the filtration process is mitigated to a great extent. The pillared GP-based supercapacitors exhibit excellent electrochemical performances and cyclic stabilities compared with GP without the addition of CB nanoparticles. At a scan rate of 10 mV s -1, the specific capacitance of the pillared GP is 138 F g -1 and 83.2 F g -1 with negligible 3.85% and 4.35% capacitance degradation after 2000 cycles in aqueous and organic electrolytes, respectively. At an extremely fast scan rate of 500 mV s -1, the specific capacitance can reach 80 F g -1 in aqueous electrolyte. No binder is needed for assembling the supercapacitor cells and the pillared GP itself may serve as a current collector due to its intrinsic high electrical conductivity. The pillared GP has great potential in the development of promising flexible and ultralight-weight supercapacitors for electrochemical energy storage.

Original languageEnglish (US)
Pages (from-to)452-459
Number of pages8
JournalSmall
Volume8
Issue number3
DOIs
StatePublished - Feb 6 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

Keywords

  • carbon black
  • electrodes
  • graphene
  • nanoparticles
  • supercapacitors

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