SnO2-RuO2 composite films by chemical deposition for supercapacitor application

► Chemical bath deposition of SnO2-RuO2 composite films. ► Supercapacitor application. ► Maximum specific capacitance of 150 F g−1. ► Maximum energy density of 4.9 Wh kg−1 at a power density of 0.42 kW kg−1.