High-Thermal-Stability and High-Thermal-Conductivity Ti(3)C(2)T(x) MXene/Poly(vinyl alcohol) (PVA) Composites

[Image: see text] MXenes, a new family of two-dimensional materials, have recently attracted increasing attention due to their unique properties for a wide range of potential applications. Herein, we synthesize Ti(3)C(2)T(x)/poly(vinyl alcohol) (PVA) composites and investigate the effects of the thermal properties of MXene by temperature-dependent Raman spectroscopy and polarized-laser power-dependent Raman spectroscopy. Compared to the Ti(3)C(2)T(x) MXene, the PVA significantly improves the thermal stability of Ti(3)C(2)T(x) by reducing the thermal coefficient of the E(g)(1) mode from −0.06271 to −0.03357 cm(–1)/K, which is attributed to the strong Ti–O bonds formed between the MXene and PVA polymer confirmed by the X-ray photoelectron spectroscopy results. Meanwhile, the thermal conductivities of Ti(3)C(2)T(x) and Ti(3)C(2)T(x)/PVA composites reach as high as about 55.8 and 47.6 W/(m K), respectively. Overall, this work will contribute to extend the MXene applications in terms of polymer-based nanocomposites and improve the reliability of the related devices effectively.