Impact of binder concentration and pressure on performance of symmetric CNFs based supercapacitors

•The CNFs based supercapacitor performance is dependent on electrode preparation method.•The BET surface area and pore volume decrease with increase in PVDF concentration.•The specific capacitance increase with decrease in PVDF content.•The specific capacitance increase from with increase in pressure.•The high specific capacitance is related to moderate PVDF concentration and pressure.