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Extremely flexible and mechanically durable planar supercapacitors: High energy density and low-cost power source for E-skin electronics
- Extremely flexible and mechanically durable planar supercapacitors: High energy density and low-cost power source for E-skin electronics
- Yun, Younghun; Nandanapalli, Koteeswara Reddy; Choi, Ji-Hyuk; Son, Wonkyeong; Choi, Changsoon; Lee, Sungwon
- DGIST Authors
- Lee, Sungwon
- Issue Date
- Nano Energy, 78, 105356
- Article Type
- Author Keywords
- Graphene; Porous structures; Supercapacitors; Flexible devices; E-skin devices; Power-sources
- Biocompatible substrates; Complicated surface; Healthcare technology; High energy densities; High specific capacitances; Micro supercapacitors; Multifunctional devices; Operating flexibility; Flexible electronics; Biocompatibility; Capacitance; Costs; Energy storage; Mechanical stability; Substrates; Supercapacitor; Wearable technology
- The development of multifunctional devices on highly flexible and biocompatible substrates has received great attention in the field of wearable and healthcare technologies. To realize such a unique technology typically on a single platform, it is very crucial to adopt highly-flexible and embeddable energy storage devices with adequate efficiencies as power sources. In this direction, we introduce a versatile and scalable approach to fabricate planar and symmetric micro-supercapacitors, which can be mounted on any complicated surface. The micro-supercapacitors developed on highly flexible and ultrathin substrates by the angular spray of graphene-ink showed excellent performance with a maximum areal capacitance of ~8.38 mF/cm2 and operating flexibility for a bending radius of 1.8 mm. The devices also displayed outstanding mechanical stability for 10,000 bending cycles with a high specific capacitance (~22 F/g) and power density (~1.13 kW/kg) typically at a scan rate of 100 mV/s. Further, the demonstrations on skin-mountable and wrappable characteristics of mSCs emphasized their adaptability as embeddable power sources for various epidermal and wearable devices. © 2020 Published by Elsevier Ltd.
- Elsevier Ltd
- Related Researcher
Bio-Harmonized Device Lab
Ultrathin Device Fabrication; Bio sensors Development; Functional Material Development
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- Department of Emerging Materials ScienceBio-Harmonized Device Lab1. Journal Articles
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