A Supercapacitive Iontronic Sensor Using Woven Dielectric of Surface-Grooved Fibers

Interfacial supercapacitive sensing-based iontronic sensors have become increasingly popular in wearable technology due to their high sensitivity and noise immunity. However, many existing iontronic sensors have faced issues, such as fabrication complexities and high costs, which remain significant obstacles. Addressing these concerns, this work employed a commercially available viscose woven fabric as the elastic substrate and utilizing ionic liquid (IL) as the ion source. The sensor not only achieves an initial capacitance in the nF range but also demonstrates an exceptional sensitivity of up to 0.325 nF kPa-1, notably resistant to parasitic capacitance’s adverse effects. It has a broad pressure detection range of 200 kPa, quick response and recovery times of 60 and 30 ms, respectively, a measurable response under 11 Pa, and strong durability. Its flexibility and unique properties allow the device to respond to bending and temperature stimuli. These excellent properties make it ideal for monitoring various human physiological signals, transmitting information, and evaluating temperature changes. Therefore, the outstanding features of the sensor, produced in a simple and cost-effective method, make it suitable for multiple applications.