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Controlling the actuation properties of MXene paper electrodes upon cation intercalation
Journal article   Open access   Peer reviewed

Controlling the actuation properties of MXene paper electrodes upon cation intercalation

Jeremy Come, Jennifer M Black, Maria R Lukatskaya, Michael Naguib, Majid Beidaghi, Adam J Rondinone, Sergei V Kalinin, David J Wesolowski, Yury Gogotsi and Nina Balke
Nano energy, v 17, pp 27-35
Oct 2015
url
https://doi.org/10.1016/j.nanoen.2015.07.028View
Published, Version of Record (VoR) Open

Abstract

Atomic force microscopy Intercalation Electromechanical actuator MXene
Atomic force microscopy was used to monitor the macroscopic deformation in a delaminated Ti3C2 paper electrode in situ, during charge/discharge in a variety of aqueous electrolytes to examine the effect of the cation intercalation on the electrochemical behavior and mechanical response. The results show a strong dependence of the electrode deformation on cation size and charge. The electrode undergoes a large contraction during Li+, Na+ or Mg2+ intercalation, differentiating the Ti3C2 paper from conventional electrodes where redox intercalation of ions (e.g. Li+) into the bulk phase (e.g. graphite, silicon) results in volumetric expansion. This feature may explain the excellent rate performance and cyclability reported for MXenes. We also demonstrated that the variation of the electromechanical contraction can be easily adjusted by electrolyte exchange, and shows interesting characteristics for the design of actuators based on 2D metal carbides. [Display omitted] •Volume changes of 2D Ti3C2 MXene electrodes during cation intercalation are investigated.•Large and reversible contraction is measured for Li+, Na+ and Mg2+ intercalation.•The MXene actuation behavior can be controlled with a proper electrolyte selection.•2D titanium carbide electrodes are promising for tunable electromechanical actuators.

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Collaboration types
Domestic collaboration
Web of Science research areas
Chemistry, Physical
Materials Science, Multidisciplinary
Nanoscience & Nanotechnology
Physics, Applied
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