NaClO4 and NaPF6 as potential non-aqueous electrolyte salts for electrical double layer capacitor application

► New NaClO4 and NaPF6 based non-aqueous electrolytes for electrical double layer capacitors. ► High specific energy and power EDLCs based on mixed carbonate solvents (EC + DMC). ► Mo2C derived mainly microporous carbon as an electrode material. ► Nearly ideal capacitive behavior at moderate potential regions ΔV ≤ 3.4 V. ► Specific energy and specific power calculated for Na+ ion based non-aqueous electrolytes are comparable to corresponding Li+ ion electrolytes.