An Ionic Assisted Enhancement Strategy Enabled High Performance Flexible Pressure–Temperature Dual Sensor

Flexible pressure sensors with a broad range and high sensitivity are greatly desired yet challenging to build. Herein, we have successfully fabricated a pressure-temperature dual sensor via an ionic assisted charge enhancement strategy. Benefiting from the immobilization effect for [EMIM⁺] [TFSI^-] ion pairs and charge transfer between ionic liquid (IL) and HFMO (H₁₀Fe₃Mo₂₁O₅₁), the formed IL-HFMO-TPU pressure sensor shows a high sensitivity of 25.35 kPa^-1 and broad sensing range (∼10 MPa), respectively. Furthermore, the sensor device exhibits high durability and stability (5000 cycles@1 MPa). The IL-HFMO-TPU sensor also shows the merit of good temperature sensing properties. Attributed to these superior properties, the proposed sensor device could detect pressure in an ultrawide sensing range (from Pa to MPa), including breathe and biophysical signal monitoring etc. The proposed ionic assisted enhancement approach is a generic strategy for constructing high performance flexible pressure-temperature dual sensor.