期刊
NATURE COMMUNICATIONS
卷 4, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms3487
关键词
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资金
- ERCNANOGRAPH
- 2DMATER
- ENERCHEM
- DFG Priority Program [SPP 1459]
- ESF Project GOSPEL [9-EuroGRAPHENE-FP-001]
- EU
- Graphene Flagship [CNECT-ICT-604391]
Micro-supercapacitors are important on-chip micro-power sources for miniaturized electronic devices. Although the performance of micro-supercapacitors has been significantly advanced by fabricating nanostructured materials, developing thin-film manufacture technologies and device architectures, their power or energy densities remain far from those of electrolytic capacitors or lithium thin-film batteries. Here we demonstrate graphene-based in-plane interdigital micro-supercapacitors on arbitrary substrates. The resulting micro-supercapacitors deliver an area capacitance of 80.7 mu Fcm(-2) and a stack capacitance of 17.9 F cm(-3). Further, they show a power density of 495Wcm(-3) that is higher than electrolytic capacitors, and an energy density of 2.5mWhcm(-3) that is comparable to lithium thin-film batteries, in association with superior cycling stability. Such microdevices allow for operations at ultrahigh rate up to 1,000Vs(-1), three orders of magnitude higher than that of conventional supercapacitors. Micro-supercapacitors with an in-plane geometry have great promise for numerous miniaturized or flexible electronic applications.
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