Effect of electrode mass ratio on aging of activated carbon based supercapacitors utilizing organic electrolytes

▶ Aging of supercapacitors at high voltage (3.5 V) depends on electrode mass ratio. ▶ Strategy for reduced aging is similar for acetonitrile and propylene carbonate. ▶ Increase of the mass of positive electrode leads to reduced aging. ▶ For a mass balanced cell the potential of the positive electrode is reduced.