Solid waste for energy storage material as electrode of supercapacitors

• A novel idea of using smoke ash as green energy storage material is proposed.
• XRD, EDX, and XPS results show that main material in smoke ash is Calcium Carbonate.
• Supercapacitor fabricated from smoke ash shows high specific capacity of 183.33 F/g.
• Supercapacitor shows 90% capacity retention after 2000 charging-discharging cycles.
• Results indicate that smoke ash can be used as green energy storage material.

We propose a novel idea to utilize environment pollutant cigarette ash for energy storage material as electrode of supercapacitors as supercapacitors can deliver high power and reasonable energy densities as compared to batteries which deliver energy as a result of chemical reactions and suffer with low power densities. Keeping in view this advantage and research focus in this field, supercapacitors of cigarette ash were fabricated as energy storage devices. The electrode composed of ash shows specific capacitance of 183.33 F/g at current density of 1 A/g for 1st cycle and 165 F/g for 2000th cycle which indicate its remarkable long-term cyclic stability in Na2SO4 electrolyte.

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