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RuO2-coated vertical graphene hybrid electrodes for high-performance solid-state supercapacitorsElectronic supplementary information (ESI) available. See DOI: 10.1039/c7ta03355a
Hybrid electrodes consisting of ruthenium dioxide (RuO 2 ) and graphene hold great promise in the development of high-performance supercapacitors. However, the present methods for fabricating RuO 2 /graphene hybrids are complex and costly, preventing their widespread applications. Here, we demonstra...
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Main Authors: | , , , , , |
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Format: | Article |
Language: | English |
Online Access: | Get full text |
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Summary: | Hybrid electrodes consisting of ruthenium dioxide (RuO
2
) and graphene hold great promise in the development of high-performance supercapacitors. However, the present methods for fabricating RuO
2
/graphene hybrids are complex and costly, preventing their widespread applications. Here, we demonstrate a simple, scalable and cost-effective method to prepare hybrid electrodes composed of RuO
2
and vertical graphene (VG). VG is used as the support to offer several unique features, including a three-dimensional (3D) porous structure, a large surface area, good mechanical rigidity and high electrical conductivity. With a solution-free reactive magnetron sputtering method, RuO
2
can be uniformly coated on VG with controllable loading. Solid-state supercapacitors assembled using the binder-free RuO
2
/VG hybrids and a polymer gel electrolyte possess a high areal capacitance, low electrical resistance, good frequency response, and excellent capacitance retention after 10 000 cycles of charging and discharging. Our results demonstrate the potential of RuO
2
/VG hybrids in developing high-performance solid-state supercapacitors in a cost-effective manner, paving the way towards the commercialization of various Ru-based energy storage devices.
Solid-state supercapacitors can be fabricated by uniformly coating RuO
2
onto vertical graphene (VG) using a simple, scalable, low-cost and solution-free method. The binder-free RuO
2
/VG hybrid electrodes possess a high areal capacitance, low electrical resistance, good frequency response, and excellent stability, shedding light on the commercialisation of Ru-based energy storage devices. |
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ISSN: | 2050-7488 2050-7496 |
DOI: | 10.1039/c7ta03355a |