A Wearable Supercapacitor Based on Conductive PEDOT:PSS‐Coated Cloth and a Sweat Electrolyte. Issue 24 (11th May 2020)

• Record Type: Journal Article
• Authors: Manjakkal, Libu; Pullanchiyodan, Abhilash; Yogeswaran, Nivasan; Hosseini, Ensieh S.; Dahiya, Ravinder
• Is Part Of: Advanced materials. Volume 32:Issue 24(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-05-11
• Subjects: energy materials -- PEDOT:PSS -- smart textiles -- supercapacitor -- sweat -- wearable; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201907254
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: A sweat‐based flexible supercapacitor (SC) for self‐powered smart textiles and wearable systems is presented. The developed SC uses sweat as the electrolyte and poly(3, 4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as the active electrode. With PEDOT:PSS coated onto cellulose/polyester cloth, the SC shows specific capacitance of 8.94 F g −1 (10 mF cm −2 ) at 1 mV s −1 . With artificial sweat, the energy and power densities of the SC are 1.36 Wh kg −1 and 329.70 W kg −1, respectively for 1.31 V and its specific capacitance is 5.65 F g −1 . With real human sweat the observed energy and power densities are 0.25 Wh kg −1, and 30.62 W kg −1, respectively. The SC performance is evaluated with different volumes of sweat (20, 50, and 100 µL), bending radii (10, 15, 20 mm), charging/discharging stability (4000 cycles), and washability. With successful on‐body testing, the first demonstration of the suitability of a sweat‐based SC for self‐powered cloth‐based sensors to monitor sweat salinity is presented. With attractive performance and the use of body fluids, the presented approach is a safe and sustainable route to meet the power requirements in wearable systems. Abstract : To power devices on smart textiles and wearable systems, a textile‐based supercapacitor using sweat as an electrolyte is presented. In comparison with traditional toxic electrolytes, the sweat electrolyte is safe for wearables. The supercapacitor uses poly(3, 4‐ethylenedioxythiophene):poly(styrenesulfonate) as the active electrode and the observed energy and power densities with sweat are 0.095 Wh kg −1 and 3.81 W kg −1 .