Loading…

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...

Full description

Saved in:
Bibliographic Details
Main Authors: Han, Zhao Jun, Pineda, Shafique, Murdock, Adrian T, Seo, Dong Han, Ostrikov, Kostya (Ken), Bendavid, Avi
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
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.
ISSN:2050-7488
2050-7496
DOI:10.1039/c7ta03355a