Energy storage of thermally reduced graphene oxide

Jung Min Kim, Won G. Hong, Sang Moon Lee, Sung Jin Chang, Yongseok Jun, Byung Hoon Kim, Hae Jin Kim

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The energy-storage capacity of reduced graphene oxide (rGO) is investigated in this study. The rGO used here was prepared by thermal annealing under a nitrogen atmosphere at various temperatures (300, 400, 500 and 600 C). We measured high-pressure H2 isotherms at 77 K and the electrochemical performance of four rGO samples as anode materials in Li-ion batteries (LIBs). A maximum H2 storage capacity of ∼5.0 wt% and a reversible charge/discharge capacity of 1220 mAh/g at a current density of 30 mA/g were achieved with rGO annealed at 400 C with a pore size of approximately 6.7 Å. Thus, an optimal pore size exists for hydrogen and lithium storage, which is similar to the optimum interlayer distance (6.5 Å) of graphene oxide for hydrogen storage applications.

Original languageEnglish
Pages (from-to)3799-3804
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume39
Issue number8
DOIs
Publication statusPublished - 2014 Mar 6
Externally publishedYes

Keywords

  • Graphene oxide
  • Hydrogen storage
  • Li-ion batteries
  • Optimal pore size
  • Thermal annealing

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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  • Cite this

    Kim, J. M., Hong, W. G., Lee, S. M., Chang, S. J., Jun, Y., Kim, B. H., & Kim, H. J. (2014). Energy storage of thermally reduced graphene oxide. International Journal of Hydrogen Energy, 39(8), 3799-3804. https://doi.org/10.1016/j.ijhydene.2013.12.144