MnOx-electrodeposited fabric-based stretchable supercapacitor with intrinsic strain sensing

Pullanchiyodan, A., Manjakkal, L. , Ntagios, M. and Dahiya, R. (2021) MnOx-electrodeposited fabric-based stretchable supercapacitor with intrinsic strain sensing. ACS Applied Materials and Interfaces, 13(40), pp. 47581-47592. (doi: 10.1021/acsami.1c12526) (PMID:34592809)

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The increasing number of devices needed by wearable systems to bring radical advances in healthcare, robotics, and human–machine interfaces is a threat to their growth if the integration and energy-related challenges are not managed. A natural solution is to reduce the number of devices while retaining the functionality or simply using multifunctional devices, as demonstrated here through a stretchable supercapacitor (SSC) with intrinsic strain sensing. The presented SSC was obtained by electrodeposition of nanoflower MnOx on fabric (as a pseudocapacitive electrode) and three-dimensional conductive wrapping of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) to boost the performance. Among fabricated devices, the stretchable PEDOT:PSS/MnOx/PEDOT:PSS supercapacitor (SPMP-SC) showed the best performance (specific capacitance of 580 mF·cm–2 (108.1 F·g–1); energy density of 51.4 μWh·cm–2 at 0.5 mA). The stretchability (0–100%; 1000 cycles) analysis of SPMP-SC with Ecoflex encapsulation showed high capacitance retention (>90% for 40% stretch). The intrinsic strain sensing of the SSC was confirmed by the linear variation of capacitance (sensitivity −0.4%) during stretching. Finally, as a proof-of-concept, the application of SSC with intrinsic sensing was demonstrated for health monitoring through volumetric expansion of a manikin during ventilator operation and in robotics and by measuring the joint angle of a robotic hand.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Ntagios, Markellos and Manjakkal, Dr Libu and Dahiya, Professor Ravinder and Pullanchiyodan, Dr Abhilash
Authors: Pullanchiyodan, A., Manjakkal, L., Ntagios, M., and Dahiya, R.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:ACS Applied Materials and Interfaces
Publisher:American Chemical Society
ISSN (Online):1944-8252
Published Online:01 October 2021
Copyright Holders:Copyright © 2021 The Authors
First Published:First published in ACS Applied Materials and Interfaces 13(40): 47581-47592
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
303806FULLY PRINTED FABRIC BASED FLEXIBLE AND SELF HEALING SUPERCAPACITORRavinder DahiyaThe Royal Society (ROYSOC)NIF/R1/182437ENG - Electronics & Nanoscale Engineering
301728Engineering Fellowships for Growth: Printed Tactile SKINRavinder DahiyaEngineering and Physical Sciences Research Council (EPSRC)EP/R029644/1ENG - Electronics & Nanoscale Engineering