Here, we demonstrates the fabrication of binder free and very efficient supercapacitor electrode based on tungsten nitride (W2N) thin film on stainless steel (SS) substrate using reactive sputtering technique. W2N thin film as a working electrode exhibits high specific capacitance (163 F g(-1) at 0.5 mA cm(-2) in 1 M H2SO4) along with excellent cycling stability. The binder free symmetric supercapacitor (W2N parallel to W2N) device delivers a high specific capacitance (80 Fg(-1)) and long life span (90.46% capacitance retention after 10,000 cycles) along with high energy (12.92 Whkg(-1)) and power (similar to 674 kWkg(-1) at 9.36 Whkg(-1)) densities. These observed excellent electrochemical performances of the present W2N thin film based supercapacitor device, recommend it as a potential candidate for energy storage applications. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.