Issue 13, 2023

Highly stretchable ionotronic pressure sensors with broad response range enabled by microstructured ionogel electrodes

Abstract

Stretchable pressure sensors with high sensitivity and wide pressure–response range are ideal for perceiving physical interactions in human health monitoring, soft robotic applications, and human–machine interfaces. However, all existing pressure sensors either show limited stretchability or suffer from narrow response range. Here, we report a highly stretchable ionotronic capacitive pressure sensor (iCPS) that achieves high sensitivity (up to 0.51 kPa−1) over a broad pressure range (up to 1 MPa), even under 100% in-plane tensile deformation, enabled by the synergy of a stretchable, bio-inspired microstructured ionogel electrode and a contact area-controlled sensing mechanism. Such sensors show real-time accurate recognition of subtle human physiological signals and identification of object hardness. Moreover, a sensor array with spatial resolution has been fabricated with the successful input of letters in Morse code under different gestures. It is expected that the highly stretchable microstructured ionogel electrodes are widely applicable to other types of stretchable sensors to achieve higher stretchability, together with high sensitivity over a wide response range.

Graphical abstract: Highly stretchable ionotronic pressure sensors with broad response range enabled by microstructured ionogel electrodes

  • This article is part of the themed collection: #MyFirstJMCA

Supplementary files

Article information

Article type
Paper
Submitted
25 Dec 2022
Accepted
07 Mar 2023
First published
07 Mar 2023

J. Mater. Chem. A, 2023,11, 7201-7212

Highly stretchable ionotronic pressure sensors with broad response range enabled by microstructured ionogel electrodes

Z. Huang, Y. Chen, J. Peng, T. Huang, F. Hu, X. Liu, L. Xu and K. Yue, J. Mater. Chem. A, 2023, 11, 7201 DOI: 10.1039/D2TA10002A

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