Vertically-aligned Ti₂CT _x on carbon cloth for high-performance flexible pressure sensors

High performance flexible pressure sensors, as a very important group of electronic component for information transmission and collection, have gained widespread attention. Herein, Ti₂CT _x MXene nanosheets were vertically grown on carbon cloth substrate (Ti₂CT _x @CC) via the simple sintering and subsequent etching process. Flexible pressure sensors featuring the Ti₂CT _x MXene nanosheets as the sensitive material were then fabricated using polyvinylidene fluoride (PVDF) film weaved by the electrospinning route between the sensitive material and the interdigital electrodes to improve the sensitivity. As-fabricated flexible sensor exhibited superior performances including high sensitivity up to 3109.2 kPa⁻¹, good response and recovery time of 80/80 ms, and favorable stability over 8000 loading/unloading cycles. Boasting the high sensitivity across a broad range, the sensor can in real-time capture a spectrum of human activities—from the faint pulse signal to the large pressure of joint activities and shows promising capability for mapping spatial pressure distribution.