Ionic covalent organic framework based electrolyte for fast-response ultra-low voltage electrochemical actuators

Electrically activated soft actuators with large deformability are important for soft robotics but enhancing durability and efficiency of electrochemical actuators is challenging. Herein, we demonstrate that the actuation performance of an ionic two-dimensional covalent-organic framework based electrochemical actuator is improved through the ordered pore structure of opening up efficient ion transport routes. Specifically, the actuator shows a large peak to peak displacement (9.3 mm, +/- 0.5 V, 1 Hz), a fast-response time to reach equilibrium-bending (similar to 1 s), a correspondingly high bending strain difference (0.38%), a broad response frequency (0.1-20 Hz) and excellent durability (>99%) after 23,000 cycles. The present study ascertains the functionality of soft electrolyte as bionic artificial actuators while providing ideas for expanding the limits in applications for robots.

Automated summary

This study improves the actuation performance of ionic two-dimensional covalent-organic framework-based electrochemical actuators through ordered pore structure, resulting in large displacement, fast response time, high bending strain difference, broad response frequency, and excellent durability. It confirms the functionality of soft electrolyte as bionic artificial actuators and provides ideas for expanding the limits in robot applications.