Solid-state supercapacitors can be fabricated by uniformly coating RuO2onto vertical graphene (VG) using a simple, scalable, low-cost and solution-free method. The binder-free RuO2/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.