Flexible piezoionic strain sensors with high sensitivity are critical to artificial intelligence. Solid-state ion conductors are basic components in piezoionic sensors, and have great effects on the sensing properties. Here, we have put forward an ionogel composed of polyvinyl alcohol and ionic liquid, which presents high ionic conductivity and superior flexibility. The ionogel fabrication is simple and shows potential for large-scale production. The force-voltage coupling effect makes ionogels as promising candidates for sensor application. Further, piezoionic sensors based on ionogels display good sensing properties with high working stability, and have been applied for detection of subtle pulse signals.
Bibliographical noteFunding Information:
This work was supported by startup funding (NH10900522) from Soochow University, the Natural Science Foundation of Jiangsu Province ( BK20220505 ), and Center for Advanced Materials for Energy and Environment at Columbia University.
© 2022 Elsevier B.V.
- Force-voltage coupling
- Piezoionic sensors
- Pulse detection