1,896 research outputs found
Evolution of Graphene Molecules: Structural and Functional Complexity as Driving Forces behind Nanoscience
Graphene-based in-plane micro-supercapacitors with high power and energy densities
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 μF cm(−2) and a stack capacitance of 17.9 F cm(−3). Further, they show a power density of 495 W cm(−3) that is higher than electrolytic capacitors, and an energy density of 2.5 mWh cm(−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 1,000 V s(−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
Nanographenes and Graphene Nanoribbons as Multitalents of Present and Future Materials Science
Photolithographic fabrication of high-performance all-solid-state graphene-based planar micro-supercapacitors with different interdigital fingers
Solution and on-surface synthesis of structurally defined graphene nanoribbons as a new family of semiconductors
High-performance deformable photoswitches with p-doped graphene as the top window electrode
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