MnOx-Electrodeposited Fabric-Based Stretchable Supercapacitors with Intrinsic Strain Sensing

Pullanchiyodan, Abhilash; Manjakkal, Libu; Ntagios, Markellos; Dahiya, Ravinder

Abstract

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.

Citation

Pullanchiyodan, A., Manjakkal, L., Ntagios, M., & Dahiya, R. (2021). MnOx-Electrodeposited Fabric-Based Stretchable Supercapacitors with Intrinsic Strain Sensing. ACS applied materials & interfaces, 13(40), 47581-47592. https://doi.org/10.1021/acsami.1c12526

• Journal Article Type: Article
• Acceptance Date: Sep 21, 2021
• Online Publication Date: Oct 1, 2021
• Publication Date: Oct 13, 2021
• Deposit Date: Jul 18, 2022
• Publicly Available Date: Jul 19, 2022
• Journal: ACS Applied Materials & Interfaces
• Print ISSN: 1944-8244
• Electronic ISSN: 1944-8252
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 13
• Issue: 40
• Pages: 47581-47592
• DOI: https://doi.org/10.1021/acsami.1c12526
• Keywords: stretchable supercapacitors, manganese oxides, strain sensors, multifunctional supercapacitors, intrinsic sensing
• Public URL: http://researchrepository.napier.ac.uk/Output/2889451