Flexible Graphene–Graphene Composites of Superior Thermal and Electrical Transport Properties
- 21 August 2014
- journal article
- Published by American Chemical Society (ACS) in ACS Applied Materials & Interfaces
- Vol. 6 (17), 15026-15032
- https://doi.org/10.1021/am502986j
Abstract
Graphene is known for high thermal and electrical conductivities. In the preparation of neat carbon materials based on graphene, a common approach has been the use of well-exfoliated graphene oxides (GOs) as the precursor, followed by conversion to reduced GOs (rGOs). However, rGOs are more suitable for the targeted high electrical conductivity achievable through percolation but considerably less effective in terms of efficient thermal transport dictated by phonon progression. In this work, neat carbon films were fabricated directly from few-layer graphene sheets, avoiding rGOs completely. These essentially graphene-graphene composites were of a metal-like appearance and mechanically flexible, exhibiting superior thermal and electrical transport properties. The observed thermal and electrical conductivities are higher than 220 W/m · K and 85000 S/m, respectively. Some issues in the further development of these mechanically flexible graphene-graphene nanocomposite materials are discussed and so are the associated opportunities.Funding Information
- Air Force Office of Scientific Research
- South Carolina Space Grant Consortium
- Japan Society for the Promotion of Science
This publication has 41 references indexed in Scilit:
- Light-weight nanocomposite materials with enhanced thermal transport propertiesNanotechnology Reviews, 2012
- Thermal conductivity of isotopically modified grapheneNature Materials, 2012
- Graphene quilts for thermal management of high-power GaN transistorsNature Communications, 2012
- Thermal properties of graphene and nanostructured carbon materialsNature Materials, 2011
- Dimensional crossover of thermal transport in few-layer grapheneNature Materials, 2010
- First-principles analysis of lattice thermal conductivity in monolayer and bilayer graphenePhysical Review B, 2009
- Thermal Conductivity and Thermal Rectification in Graphene Nanoribbons: A Molecular Dynamics StudyNano Letters, 2009
- Extremely high thermal conductivity of graphene: Prospects for thermal management applications in nanoelectronic circuitsApplied Physics Letters, 2008
- Superior Thermal Conductivity of Single-Layer GrapheneNano Letters, 2008
- Aligned Carbon Nanotube Composite Films for Thermal ManagementAdvanced Materials, 2005