Phase-locked constructing dynamic supra- molecular ionic conductive elastomers with superior toughness, autonomous self-healing and recyclability

Stretchable ionic conductors are considerable to be the most attractive candidate for next-generation flexible ionotronic devices. Nevertheless, high ionic conductivity, excellent mechanical properties, good self-healing capacity and recyclability are necessary but can be rarely satisfied in one material. Herein, we propose an ionic conductor design, dynamic supramolecular ionic conductive elastomers (DSICE), via phase-locked strategy, wherein locking soft phase polyether backbone conducts lithium-ion (Li+) transport and the combination of dynamic disulfide metathesis and stronger supramolecular quadruple hydrogen bonds in the hard domains contributes to the self-healing capacity and mechanical versatility. The dual-phase design performs its own functions and the conflict among ionic conductivity, self-healing capability, and mechanical compatibility can be thus defeated. The well-designed DSICE exhibits high ionic conductivity (3.77 x 10(-3) S m(-1) at 30 degrees C), high transparency (92.3%), superior stretchability (2615.17% elongation), strength (27.83 MPa) and toughness (164.36 MJ m(-3)), excellent self-healing capability (similar to 99% at room temperature) and favorable recyclability. This work provides an interesting strategy for designing the advanced ionic conductors and offers promise for flexible ionotronic devices or solid-state batteries.

Automated summary

This study proposes a design for stretchable ionic conductors called dynamic supramolecular ionic conductive elastomers (DSICE), using a phase-locked strategy. The soft phase polyether backbone conducts lithium-ion transport, while the combination of dynamic disulfide metathesis and supramolecular quadruple hydrogen bonds in the hard domains contributes to self-healing capacity and mechanical versatility. The well-designed DSICE exhibits high ionic conductivity, transparency, stretchability, strength, toughness, self-healing capability, and recyclability.