Ruthenium sulfide nanoparticles as a new pseudocapacitive material for supercapacitor

•RuS2 nanoparticles were prepared via sonochemical approach.•RuS2 based symmetric supercapacitor (SC) device was fabricated.•Symmetric RuS2 SC device delivered a specific capacitance of 17Fg−1.•The RuS2 SC device possesses capacitance retention of about 96.15% over 5000 cycles. Transition metal chal...

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