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

65 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

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Highly Elastic and Conductive N-Doped Monolithic Graphene Aerogels for Multifunctional Applications'. Together they form a unique fingerprint.

  • Cite this