Jump to main content
Jump to site search


Solid-state and liquid-free elastomeric ionic conductors with autonomous self-healing ability

Author affiliations

Abstract

Solid-state and liquid-free stretchable ionic conductors are highly desirable for stretchable electronics, because the ion-conductive hydrogels and ionogels suffer from potential solvent evaporation and leakage, respectively. Herein, we report a highly stretchable, resilient and liquid-free ion-conductive elastomer, which is further exploited as a stretchable, pressure-independent touch sensor. The liquid-free ion-conductive elastomer is reasonably designed by simultaneously incorporating highly flexible ethoxy chains and hydrogen-bonding sites into the main chains of the imidazole-based polymeric ionic liquid (PIL). The hydrogen-bond cross-linking significantly enhances the mechanical strength and resilience of the PIL-based elastomer despite maintaining a very low glass transition temperature. As a result, the solid-state and liquid-free ion-conductive elastomer possesses an ionic conductivity as high as ca. 0.131 mS cm−1 at room temperature, a satisfactory tensile strength of ca. 0.24 MPa and a high elongation-at-break of ca. 540%. Importantly, the ion-conductive elastomer exhibits an autonomous self-healing behavior at room temperature, making the cut sample easily recover its original mechanical performance and ionic conductivity. Electrical impedance-based stretchable touch sensors can be fabricated by simply incorporating the ion-conductive elastomer into the alternating current circuit. The touch sensor can accurately sense human touch regardless of being stretched or not. Because of the self-healing property, the stretchable touch sensor can easily restore its sensing performance even after break. The as-developed touch sensor shows high promise for application in human–machine interfaces of soft and stretchable electronics.

Graphical abstract: Solid-state and liquid-free elastomeric ionic conductors with autonomous self-healing ability

Back to tab navigation

Supplementary files

Article information


Submitted
31 Jul 2020
Accepted
04 Sep 2020
First published
04 Sep 2020

Mater. Horiz., 2020, Advance Article
Article type
Communication

Solid-state and liquid-free elastomeric ionic conductors with autonomous self-healing ability

X. Qu, W. Niu, R. Wang, Z. Li, Y. Guo, X. Liu and J. Sun, Mater. Horiz., 2020, Advance Article , DOI: 10.1039/D0MH01230K

Social activity

Search articles by author

Spotlight

Advertisements