Due to their excellent ionic conductivity, stretchability, and self-healing property, elastic ionic conductors have shown great promise for the development of flexible electronics. However, for the ionic pressure sensors, how to enhance their sensitivity and broaden their detectable range is still a challenge. Here, we develop a simple one-step method to prepare foamy structure ionic conductors, that is, ionic conductive foams (ICFs), for high-performance ionic sensing applications. The typical porous structures were constructed through a simple gas foaming technique. The asprepared ICFs combine the advantages of light-weight, stretchable, and self-healing properties. Interestingly, attributed to the porous structure feature, the ICF-based pressure sensor exhibited a high sensitivity (5.23 kPa −1 ), a broad detection range (from 0.1 to 100 kPa), excellent stability, and long-time durability. Moreover, adaptive monitoring of large and tiny pressure changes is also brought out to detect various human motions. This universal classification of ionic conductor is expected to be a promising candidate for flexible device applications in different conditions.
Stretchable electrodes have received rising attention
due to their
potential applications in flexible and wearable devices. However,
the mechanical instability of stretchable electrodes limits their
practical applications. Here, we demonstrate an efficient approach
to enhancing the stability of stretchable serpentine-shaped electrodes
by incorporating a sulfhydryl-anchored interface with disordered cones.
The sulfhydryl-anchored interface provides strong adhesion (2.3 MPa)
between the gold electrode and polymer substrate, while the disordered
cones allow for deformation of the electrode with less cracks or fractures.
By using this synergistic strategy, the electrode exhibits a large
tensile limit exceeding 50% uniaxial tensile and superior electrical
stability from 6.3 to 11.5 Ω under 20% uniaxial tensile for
more than 200 cycles. Our approach has the potential for foldable
electronics and health monitoring.
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