Table 1.

Important characteristics of different electrochemical energy storage systems [7,33,34].

	Supercapacitors (SC)			Lithium-Ion Battery
	EDLC SC	Pseudo SC	Hybrid SC
Cycle life	106	105	5 × 105	500
Energy density (Wh⋅kg−1)	3–5	10	180	250
Power density (W⋅Kg−1)	3 × 103	107	103	100
Operating temperature (°C)	−40 to 65	−40 to 65	−40 to 65	−20 to 60
Self-discharge per month (%)	60	60	Not available	4
Type of electrolyte	Aprotic or protic	Protic	Aprotic	Aprotic