Porous carbon nanotube/graphene composites for high-performance supercapacitors

Jing Li, Jie Tang, Jinshi Yuan, Kun Zhang, Xiaoliang Yu, Yige Sun, Han Zhang, Lu Chang Qin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

19 Citations (Scopus)

Abstract

Carbon nanotubes (CNTs) are an effective spacer to prevent the re-stacking of graphene layers. However, the aggregation of CNTs always reduces the specific surface area of resulting CNT/graphene composites. Meanwhile, different pores always have different contributions to the specific capacitance. In this study, CNT/graphene composites with different porous structures are synthesized by co-reduction of oxidized CNTs and graphene oxide with different mixing ratios. With an optimized CNT content of 20%, the CNT/graphene composite shows 206 F g−1 in 1-ethyl-3-methylimidazolium tetrafluoroborate electrolyte. It is found that pores larger than twice the size of electrolyte ions can make greater contributions to the specific capacitance.

Original languageEnglish
Pages (from-to)60-65
Number of pages6
JournalChemical Physics Letters
Volume693
DOIs
Publication statusPublished - Feb 2018
Externally publishedYes

Keywords

  • Carbon nanotube
  • Graphene
  • Pore structure
  • Supercapacitor

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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