High-Performance Hierarchical Black-Phosphorous-Based Soft Electrochemical Actuators in Bioinspired Applications

Guan Wu, Xingjiang Wu, Yijun Xu, Hengyang Cheng, Jinku Meng, Qiang Yu, Xinyiao Shi, Kai Zhang, Wei Chen, Su Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

35 Citations (Scopus)

Abstract

Bioinspired methods allowing artificial actuators to perform controllably are potentially important for various principles and may offer fundamental insight into chemistry and engineering. To date, the main challenges persist regarding the achievement of large deformation in fast response-time and potential-engineering applications in which electrode materials and structures limit ion diffusion and accumulation processes. Herein, a novel electrochemical actuator is developed that presents both higher electromechanical performances and biomimetic applications based on hierachically structured covalently bridged black phosphorous/carbon nanotubes. The new actuator demonstrates astonishing actuation properties, including low power consumption/strain (0.04 W cm −2 % −1 ), a large peak-to-peak strain (1.67%), a controlled frequency response (0.1–20 Hz), faster strain and stress rates (11.57% s −1 ; 28.48 MPa s −1 ), high power (29.11 kW m −3 ), and energy (8.48 kJ m −3 ) densities, and excellent cycling stability (500 000 cycles). More importantly, bioinspired applications such as artificial-claw, wings-vibrating, bionic-flower, and hand actuators have been realized. The key to high performances stems from hierachically structured materials with an ordered lamellar structure, large redox activity, and electrochemical capacitance (321.4 F g −1 ) for ions with smooth diffusion and flooding accommodation, which will guide substantial progress of next-generation electrochemical actuators.

Original languageEnglish
Article number1806492
JournalAdvanced Materials
Volume31
Issue number25
DOIs
Publication statusPublished - 20 Jun 2019
Externally publishedYes

Keywords

  • bioinspired applications
  • black phosphorous
  • electrochemical actuators
  • hierarchical structures

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this