Dual coexisting interconnected graphene nanostructures for high performance supercapacitor applications

Hyun Kyung Kim, Ali Reza Kamali, Kwang Chul Roh, Kwang Bum Kim, Derek John Fray

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

A facile and scalable high-temperature molten salt method was used to synthesize a high-quality hierarchical carbon nanostructure consisting of graphene nanosheets and nanoscrolls with an interconnected network and high electrical conductivity. During the process, the intercalation of lithium and hydrogen from molten LiCl into graphite led to the formation of a coexisting graphene sheet-scroll nanostructure. An electrode using the fabricated interconnected carbon nanostructure showed a highly reversible specific capacitance of 213 F g-1 at 1 A g-1, excellent capacitance retention (84.5% of the initial specific capacitance (1 A g-1) at 50 A g-1), and good cyclability (97.9% after 10 000 cycles). Such remarkable electrochemical performance is desirable for supercapacitor/ultracapacitor applications.

Original languageEnglish
Pages (from-to)2249-2256
Number of pages8
JournalEnergy and Environmental Science
Volume9
Issue number7
DOIs
Publication statusPublished - 2016 Jul

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All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Pollution

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