The author reports an experimental study of electrical and thermal transport in reduced graphene oxide (RGO)/polystyrene (PS) composites. The electrical conductivity (σ) of RGO/PS composites with different RGO concentrations at room temperature shows a percolation behavior with the percolation threshold of ~ 0.25 vol.%. Their temperature-dependent electrical conductivity follows Efros-Shklovskii (ES) variable range hopping (VRH) conduction in the temperature range of 30 to 300 K. The thermal conductivity (κ) of composites is enhanced by ~ 90 % as the concentration is increased from 0 to 10 vol.%. The thermal conductivity of composites approximately linearly increases with increasing temperature from 150 to 300 K. Composites with a higher concentration show a stronger temperature dependence in the thermal conductivity.
@article{arxiv.1403.2467,
title = {Electrical and thermal conductivities of reduced graphene oxide/polystyrene composites},
author = {Wonjun Park and Jiuning Hu and Luis A. Jauregui and Xiulin Ruan and Yong P. Chen},
journal= {arXiv preprint arXiv:1403.2467},
year = {2017}
}