Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene Nanosheet-Functionalized Leathers for Versatile Wearable Electronics
Jiahao Zhou, Huamin Chen, Peidi Zhou, Qinglu Peng, Qiaohang Guo, Jun Wang, Yun Xu, Ming‐Hua You, Mingcen Weng
Abstract
Flexible and multifunctional wearable electronics have attracted widespread attention. Herein, a flexible and multifunctional wearable MXene/leather fabricated by a simple vacuum filtration process has been reported. The fabricated MXene/leathers retain the unique thinness (∼1 mm) and breathability of the leather, which contributes to its comfort as wearable electronic devices. In addition, benefiting from the high-efficiency three-dimensional conductive network formed by the tight wrapping of collagen fiber bundles by MXene nanosheets inside the leather, MXene/leather exhibited excellent mechanical properties (Young’s modulus of 9.64 MPa) and conductivity (24.6 Ω sq –1 ). MXene/leather also has outstanding efficiency in electric-thermal conversion, which can be used as a flexible resistive heater to intelligently regulate the temperature of different parts of the human body at low driven voltages. Moreover, the flexible pressure sensor based on MXene/leather possesses a high sensitivity of 33.58 kPa –1, which can match the human finger pressure over a wide range without apparent deterioration. The MXene/leather-based pressure sensor can be assembled with a mechanical claw to simulate human skin for tactile recognition of object size and softness in a nondestructive manner. Finally, the MXene/leather-based triboelectric nanogenerator can not only be integrated with alternative current electroluminescence to construct a flexible display system but also monitor the human body’s movements to evaluate the health condition by harvesting mechanical energy from body movement. The MXene/leathers proposed have the potential to serve as a new versatile platform for the development of next-generation multifunctional wearable electronics.