Highly Elastic and Conductive N-Doped Monolithic Graphene Aerogels for Multifunctional Applications

In Kyu Moon, Seonno Yoon, Kyoung Yong Chun, Jungwoo Oh

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

The simple synthesis of ultralow-density (≈2.32 mg cm -3 ) 3D reduced graphene oxide (rGO) aerogels that exhibit high electrical conductivity and excellent compressibility are described herein. Aerogels are synthesized using a combined hydrothermal and thermal annealing method in which hexamethylenetetramine is employed as a reducer, nitrogen source, and graphene dispersion stabilizer. The N-binding configurations of rGO aerogels increase dramatically, as evidenced by the change in pyridinic-N/quaternary-N ratio. The conductivity of this graphene aerogel is ≈11.74 S m -1 at zero strain, whereas the conductivity at a compressive strain of ≈80% is ≈704.23 S m -1 , which is the largest electrical conductivity reported so far in any 3D sponge-like low-density carbon material. In addition, the aerogel has excellent hydrophobicity (with a water contact angle of 137.4) as well as selective absorption for organic solvents and oils. The compressive modulus (94.5 kPa; ρ ≈ 2.32 mg cm -3 ) of the rGO aerogel is higher than that of other carbon-based aerogels. The physical and chemical properties (such as high conductivity, elasticity, high surface area, open pore structure, and chemical stability) of the aerogel suggest that it is a viable candidate for the use in energy storage, electrodes for fuel cells, photocatalysis, environmental protection, energy absorption, and sensing applications.

Original languageEnglish
Pages (from-to)6976-6984
Number of pages9
JournalAdvanced Functional Materials
Volume25
Issue number45
DOIs
Publication statusPublished - 2015 Dec 2

Fingerprint

Aerogels
Graphite
aerogels
Graphene
graphene
Oxides
conductivity
oxides
Carbon
Methenamine
hexamethylenetetramine
electrical resistivity
Photocatalysis
carbon
Chemical stability
energy absorption
Energy absorption
energy storage
Hydrophobicity
hydrophobicity

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Moon, In Kyu ; Yoon, Seonno ; Chun, Kyoung Yong ; Oh, Jungwoo. / Highly Elastic and Conductive N-Doped Monolithic Graphene Aerogels for Multifunctional Applications. In: Advanced Functional Materials. 2015 ; Vol. 25, No. 45. pp. 6976-6984.
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Highly Elastic and Conductive N-Doped Monolithic Graphene Aerogels for Multifunctional Applications. / Moon, In Kyu; Yoon, Seonno; Chun, Kyoung Yong; Oh, Jungwoo.

In: Advanced Functional Materials, Vol. 25, No. 45, 02.12.2015, p. 6976-6984.

Research output: Contribution to journalArticle

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