Flexible Pressure Sensors Based on MXene/PDMS Porous Films

Abstract

AbstractWith the increasing demand for smart devices requires sensors with portability and wearability, high performance and durability,and low cost. In this work, an MXene/PDMS flexible self‐powered porous triboelectric pressure sensor (PTPS) is proposed based on the principles of triboelectrification and electrostatic induction. The film‐forming performance of the sensor is investigated for different MXene hydrosol mass ratios, and three modes of operation and practical performance of the PTPS are studied. The sensor converts the applied mechanical force into electrical signals, and the applied load in the range of 0.15–2.50 N and 2.50–5.15 N has a linear correlation with the output voltage. The obtained results show that the sensor sensitivity in these two ranges is 659.37 and 467.74 mV N−1, respectively. The response time of the proposed PTPS is less than 30 ms, and it can be applied to detect signals with a frequency up to 20 Hz. The voltage output remains stable after 6000 contact–separation test cycles. Moreover, hand gesture recognition, water drop sensing, mouse click, and keyboard press sensing are studied in wearable and non‐wearable scenarios. Based on the obtained results, it is concluded that the proposed PTPS has a promising performance in the field of self‐powered human motion sensing electronics.