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Electrochemical Actuators Based on Two-Dimensional Ti₃C₂Tₓ (MXene)

Pang, D; Alhabeb, M; Mu, X; Dall'Agnese, Y; Gogotsi, Y; Gao, Y; (2019) Electrochemical Actuators Based on Two-Dimensional Ti₃C₂Tₓ (MXene). Nano Letters , 19 (10) pp. 7443-7448. 10.1021/acs.nanolett.9b03147. Green open access

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Abstract

Electrochemical actuators are devices that convert electrical energy into mechanical energy via electrochemical processes. They are used in soft robotics, artificial muscles, micropumps, sensors, and other fields. The design of flexible and stable electrode materials remains a major challenge. MXenes, an emerging family of 2D materials, have found applications in energy storage. Here, we report an actuator device using MXene (Ti3C2Tx) as a flexible electrode material. The electrode in 1 M H2SO4 electrolyte exhibits a curvature change up to 0.083 mm–1 and strain of 0.29%. Meanwhile, the MXene-based actuator with a symmetric configuration separated by gel electrolyte (PVA–H2SO4) has curvature and strain changes up to 0.038 mm–1 and 0.26% with excellent retention after 10,000 cycles. In situ X-ray diffraction analysis demonstrates that the actuation mechanism is due to the expansion and shrinkage of the interlayer spacing of MXenes. This research shows promise of this new family of materials for electrochemical actuators.

Type: Article
Title: Electrochemical Actuators Based on Two-Dimensional Ti₃C₂Tₓ (MXene)
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1021/acs.nanolett.9b03147
Publisher version: https://doi.org/10.1021/acs.nanolett.9b03147
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: 2D materials, MXene, electrochemical actuators, in-situ X-ray diffraction, soft robotics
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office > Institute for Materials Discovery
URI: https://discovery.ucl.ac.uk/id/eprint/10082233
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