Soft Electrochemical Actuators with a Two-Dimensional Conductive Metal–Organic Framework Nanowire Array

Soft Electrochemical Actuators with a Two-Dimensional Conductive Metal–Organic Framework Nanowire Array

Electrically activated soft actuators capable of large deformation are powerful and broadly applicable in multiple fields. However, designing soft actuators that can withstand a high strain, provide a large actuation displacement, and exhibit stable reversibility are still the main challenges toward...

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Veröffentlicht in:Journal of the American Chemical Society 2021-03, Vol.143 (10), p.4017-4023
Hauptverfasser: Shi, Yi-Xiang, Wu, Yue, Wang, Shu-Qi, Zhao, Yang-Yong, Li, Tie, Yang, Xian-Qing, Zhang, Ting
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container_issue 10
container_start_page 4017
container_title Journal of the American Chemical Society
container_volume 143
creator Shi, Yi-Xiang
Wu, Yue
Wang, Shu-Qi
Zhao, Yang-Yong
Li, Tie
Yang, Xian-Qing
Zhang, Ting
description Electrically activated soft actuators capable of large deformation are powerful and broadly applicable in multiple fields. However, designing soft actuators that can withstand a high strain, provide a large actuation displacement, and exhibit stable reversibility are still the main challenges toward their practical application. Here, for the first time, we report a two-dimensional (2D) conductive metal–organic framework (MOF) based electrochemical actuator, which consists of vertically oriented and hierarchical Ni-CAT NWAs/CNF electrodes through the use of a facile one-step in situ hydrothermal growth method. The soft actuator prepared in this study demonstrated improvements in actuation performance and benefits from both the intrinsically ordered porous architecture and efficient transfer pathways for fast ion and electron transport; furthermore, this actuator facilitated a considerably high diffusion rate and low interfacial resistance. In particular, the actuator demonstrated a rapid response (
doi_str_mv 10.1021/jacs.1c00666
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However, designing soft actuators that can withstand a high strain, provide a large actuation displacement, and exhibit stable reversibility are still the main challenges toward their practical application. Here, for the first time, we report a two-dimensional (2D) conductive metal–organic framework (MOF) based electrochemical actuator, which consists of vertically oriented and hierarchical Ni-CAT NWAs/CNF electrodes through the use of a facile one-step in situ hydrothermal growth method. The soft actuator prepared in this study demonstrated improvements in actuation performance and benefits from both the intrinsically ordered porous architecture and efficient transfer pathways for fast ion and electron transport; furthermore, this actuator facilitated a considerably high diffusion rate and low interfacial resistance. In particular, the actuator demonstrated a rapid response (&lt;19 s) at a 3 V DC input, large actuation displacement (12.1 mm), and a correspondingly high strain of 0.36% under a square-wave AC voltage of ±3 V. Specifically, the actuator achieved a broad-band frequency response (0.1–20 Hz) and long-term cyclability in air (10000 cycles) with a negligible degradation in actuation performance. 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