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Title: Ultrathin smart energy-storage devices for skin-interfaced wearable electronics
Authors: Li, Jia
Yang, Peihua
Li, Xiaoya
Jiang, Cheng
Yun, Jeonghun
Yan, Wenqi
Liu, Kang
Fan, Hong Jin
Lee, Seok Woo
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2023
Source: Li, J., Yang, P., Li, X., Jiang, C., Yun, J., Yan, W., Liu, K., Fan, H. J. & Lee, S. W. (2023). Ultrathin smart energy-storage devices for skin-interfaced wearable electronics. ACS Energy Letters, 8(1), 1-8.
Project: NRF2019-NRF-ANR052 KineHarvest 
Journal: ACS Energy Letters 
Abstract: The emergence of on-skin electronics with functions in human-machine interfaces and on-body sensing calls for the development of smart flexible batteries with high performance. Electrochromic energy-storage devices provide a visual indication of the capacity through a real-time change in color without any additional power supply. In this study, dual-function battery and supercapacitor devices for skin-interfaced wearable electronics are developed by a simple and scalable transfer printing method, featuring a thickness of less than 50 μm. Supercapacitive and battery-type devices with areal capacities of 113.4 mF cm-2 and 6.1 μAh cm-2, respectively, are achieved by assembling electrochromic cathodes, hydrogel film electrolyte, and zinc anode. The high flexibility of the ultrathin energy devices endows them with good conformity on arbitrarily shaped surfaces, including elastic human skin, further enhancing the capability of intrinsically non-stretchable thin-film electronics. Our results provide a pathway for the development of versatile electronic skins and next-generation wearable electronics.
ISSN: 2380-8195
DOI: 10.1021/acsenergylett.2c02029
Schools: School of Electrical and Electronic Engineering 
School of Physical and Mathematical Sciences 
Research Centres: Rolls-Royce@NTU Corporate Lab 
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Energy Letters, copyright © 2022 American Chemical Society, after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles
SPMS Journal Articles

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