Energy autonomous sweat-based wearable systems

Manjakkal, L. , Yin, L., Nathan, A., Wang, J. and Dahiya, R. (2021) Energy autonomous sweat-based wearable systems. Advanced Materials, 33(35), 2100899. (doi: 10.1002/adma.202100899)

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The continuous operation of wearable electronics demands reliable sources of energy, currently met through Li-ion batteries and various energy harvesters. These solutions are being used out of necessity despite potential safety issues and unsustainable environmental impact. Safe and sustainable energy sources can boost the use of wearables systems in diverse applications such as health monitoring, prosthetics, and sports. In this regard, sweat- and sweat-equivalent-based studies have attracted tremendous attention through the demonstration of energy-generating biofuel cells, promising power densities as high as 3.5 mW cm−2, storage using sweat-electrolyte-based supercapacitors with energy and power densities of 1.36 Wh kg−1 and 329.70 W kg−1, respectively, and sweat-activated batteries with an impressive energy density of 67 Ah kg−1. A combination of these energy generating, and storage devices can lead to fully energy-autonomous wearables capable of providing sustainable power in the µW to mW range, which is sufficient to operate both sensing and communication devices. Here, a comprehensive review covering these advances, addressing future challenges and potential solutions related to fully energy-autonomous wearables is presented, with emphasis on sweat-based energy storage and energy generation elements along with sweat-based sensors as applications.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Dahiya, Professor Ravinder and Manjakkal, Dr Libu
Authors: Manjakkal, L., Yin, L., Nathan, A., Wang, J., and Dahiya, R.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Advanced Materials
ISSN (Online):1521-4095
Published Online:11 July 2021
Copyright Holders:Copyright © 2021 The Authors
First Published:First published in Advanced Materials 33(35): 2100899
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
301728Engineering Fellowships for Growth: Printed Tactile SKINRavinder DahiyaEngineering and Physical Sciences Research Council (EPSRC)EP/R029644/1ENG - Electronics & Nanoscale Engineering
303114Innovative Network for Training in Water and Food Quality using Disposable Sensors,Ravinder DahiyaEuropean Commission (EC)813680ENG - Electronics & Nanoscale Engineering