期刊
SMALL
卷 15, 期 27, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201901224
关键词
3D; interdigitated; microfabrication; microsupercapacitors; pseudocapacitance
类别
资金
- LAAS-CNRS technology platform
- European Research Council (ERC) [771793 3D-CAP]
- Natural Science and Engineering Research Council (NSERC) of Canada
- Canada Research Chair (CRC) program
Due to their high-power density and long lifetime, microsupercapacitors have been considered as an efficient energy supply/storage solution for the operation of small electronic devices. However, their fabrication remains confined to 2D thin-film microdevices with limited areal energy. In this study, the integration of all-solid-state 3D interdigitated microsupercapacitors on 4 in. silicon wafers with record energy density is demonstrated. The device electrodes are composed of a pseudocapacitive hydrated ruthenium dioxide RuO2 deposited onto highly porous current collectors. The encapsulated devices exhibit cell capacitance of 812 mF cm(-2) per footprint area at an energy density of 329 mJ cm(-2), which is the highest value ever reported for planar configuration. These components achieve one of the highest surface energy/power density trade-offs and address the issue of electrical energy storage of modern electronics.
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