Measurement and Analysis of Thermal Conductivity of Ti3C2Tx MXene Films

Abstract

A new class of 2D materials named "MXene" has recently received significant research interest as they have demonstrated great potential for the applications in batteries, supercapacitors, and electronic devices. However, the research on their thermal properties is still very limited. In this work, Ti₃C₂T_x films were prepared by the vacuum-assisted filtration of delaminated nano-flake Ti₃C₂T_x MXenes. The thermal and electrical conductivity of the Ti₃C₂T_x films were measured by the state-of-the-art T-type method. The results showed that the effective thermal conductivity of the films increased from 1.26 W·m^-1·K^-1 at 80 K to 2.84 W·m^-1·K^-1 at 290 K, while the electrical conductivity remained at 12,800 Ω^-1·m^-1 for the same temperature range. Thermal resistance model was applied to evaluate the inherent thermal conductivity of the Ti₃C₂T_x flakes, which was estimated to be in the range of tens to hundreds W·m^-1·K^-1.