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Screen-printable microscale hybrid device based on MXene and layered double hydroxide electrodes for powering force sensors
Journal article   Open access   Peer reviewed

Screen-printable microscale hybrid device based on MXene and layered double hydroxide electrodes for powering force sensors

Shuaikai Xu, Yohan Dall’Agnese, Guodong Wei, Chao Zhang, Yury Gogotsi and Wei Han
Nano energy, v 50, pp 479-488
Aug 2018
DOI: https://doi.org/10.1016/j.nanoen.2018.05.064
Featured in Collection :   UN Sustainable Development Goals @ Drexel
url
https://discovery.ucl.ac.uk/id/eprint/10076101/View
SubmittedOpen Access (License Unspecified),  Open

Abstract

Microscale hybrid device Force sensor Layered double hydroxide Screen-printing MXene
Coplanar energy storage devices with interdigitated electrodes have attracted a significant amount of attention as micropower units for portable and flexible electronics, and self-powered systems. Herein, we propose a simple, cost-effective, and scalable two-step screen-printing process to fabricate flexible coplanar asymmetric microscale hybrid device (MHD) with a higher energy density compared to carbon-based microsupercapacitors. 2D titanium carbide MXene (Ti3C2Tx) with a large inlayer spacing is selected as negative electrode, and Co-Al layered double hydroxide (LDH) nanosheets are selected as positive electrode. The assembled coplanar, all-solid-state, asymmetric MHD possesses a higher energy density (8.84 μWh cm−2) compared to the MXene-based, coplanar, symmetric microsupercapacitors (3.38 μWh cm−2), and exhibit excellent flexibility and reliability, as well as cycling stability (92% retention of the initial capacitance after 10,000 cycles). Moreover, we integrate the coplanar asymmetric MHDs with the force sensing resistors as portable power source units to fabricate lightweight and inexpensive integrated force sensors, which can be used to detect applied pressure variation. The two-step screen-printing method can also be extended to other MXenes and various positive electrode materials for fabrication of coplanar asymmetric MHDs on flexible substrates. Therefore, we believe that the two-step screen-printing method opens up new avenues toward developing flexible coplanar asymmetric MHDs, thus promoting the application of MHDs based on MXenes for flexible integrated electronic devices. [Display omitted] •Microscale hybrid devices can be fabricated by screen-printing method.•Ti3C2Tx is matched with cobalt-aluminum layered hydroxide to expand the voltage window of the hybrid devices.•The charge storage balance between positive and negative electrodes is evaluated.•The all-solid-state asymmetric devices possess a high energy density (8.84 μWh cm-2).•All-solid-state microscale hybrid device is integrated with the force sensor.

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207 citations in Web of Science
214 citations in Scopus

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