Journal
NANO ENERGY
Volume 26, Issue -, Pages 276-285Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2016.04.045
Keywords
Micro-supercapacitor; Surface mountable supercapacitor; Aluminum electrolyte capacitor; Graphene; Laser
Categories
Funding
- National Key Basic Research Program of China [2014CB932400]
- Guangdong Province Science and Technology Department [2014B090917002, 2014B090915002, 2014A010105002, 2015A030306010]
- Hong Kong government TRS Grant [T23-407/13-N]
- Nanshan District Rising Stars [KC2014JSQN0010A]
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With the development of wearable/flexible electronics, a formidable challenge is to integrate electronic components which were large in their original size into a flexible, thin, and arbitrary layout. As an in-dispensible component in electronics, commercial micro-supercapacitors are disadvantageous in their clumsy cuboid geometry and limited capacity, and are not promising for future applications. In comparison, film-like micro-supercapacitors are superior in miniaturized system integration since they can be folded to fit in restricted spaces while maintaining a high level of volumetric energy density. Here, we carried out a benchmark study of a state-of-the-art well-packaged thin film micro-supercapacitor toward commercial micro-supercapacitor and aluminum electrolyte capacitor. The micro-planar supercapacitor not only exhibits 3.75 times of a commercial micro-supercapacitor and 8785 times of an aluminum electrolytic capacitor in volumetric energy density under 1000 mV s(-1) scan rate, but can also be tailored into diversified shapes, rolled up, and plugged into tiny interstitial spaces inside a device. Such ultrathin (18 mu m) micro-supercapacitor component with high volumetric energy density (0.98 mWh cm(-3) in LiCl-PVA gel, 5.7 mWh cm(-3) in ionic liquid), can be integrated into an electronic device system and shows a series of superior performance characteristics over current commercial benchmarks, which may find vast applications. (C) 2016 Published by Elsevier Ltd.
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