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

Fei Yu, Jing-Hao Ciou, Shaohua Chen, Wei Church Poh, Jian Chen, Juntong Chen, Kongcharoen Haruethai, Jian Lv, Dace Gao and Pooi See Lee ()
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Fei Yu: Nanyang Technological University
Jing-Hao Ciou: Nanyang Technological University
Shaohua Chen: Nanyang Technological University
Wei Church Poh: Nanyang Technological University
Jian Chen: Nanyang Technological University
Juntong Chen: Nanyang Technological University
Kongcharoen Haruethai: Nanyang Technological University
Jian Lv: Nanyang Technological University
Dace Gao: Nanyang Technological University
Pooi See Lee: Nanyang Technological University

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract 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 (~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.

Date: 2022
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DOI: 10.1038/s41467-022-28023-2

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