Ti₃C₂T_x MXene Film with High Electrical Conductivity and Moisture Resistance

With high metallic conductivity, a new family of two-dimensional transition metal carbides (MXene) is a promising candidate for electronics. However, one of challenges in MXene application is poor stability to moisture, degradation of electrical properties by swelling (lattice expansion by water intake) and oxidation [1, 2]. For applications in the field of electronics, MXene with improved environmental stability (e.g. no significant degradation under 60°C/RH85%) is highly required. A number of works has been reported to improve MXene stability in humid conditions, including surface modification [3], but most of them have resulted in ruining their superior properties derived from diversity in surface terminating groups. In this work, we propose a facile strategy to fabricate MXene films exhibiting excellent conductivity and stability under 60°C/RH85% without tailoring of MXene surface functional groups.<br/> <br/><b>References</b><br/>[1] Voigt, C. A.; Ghidiu, M.; Natu, V.; Barsoum, M. W. Anion Adsorption, Ti₃C₂T<i>_z</i> MXene Multilayers, and Their Effect on Claylike Swelling. <i>J</i>. <i>Phys</i>. <i>Chem</i>. <i>C</i> <b>2018</b>, 122 (40), 23172–23179.<br/>[2] Iqbal, A.; Hong, J.; Ko, T. Y.; Koo, C. M. Improving oxidation stability of 2D MXenes: synthesis, storage media, and conditions. <i>Nano</i> <i>Converg</i>. <b>2021</b>, 8 (1), 1–22.<br/>[3] Chen, W. Y.; Lai, S. N.; Yen C. C.; Jiang X.; Peroulis D.; Stanciu A. Lia. Surface Functionalization of Ti₃C₂T<i>_x</i> MXene with Highly Reliable Superhydrophobic Protection for Volatile Organic Compounds Sensing. <i>ACS Nano</i> <b>2020</b>, 14 (9), 11490–11501.