Status of Biomass Derived Carbon Materials for Supercapacitor Application

Table 1

Performance comparison of different electrochemical storage systems [6].

Parameter/current performance	Lead acid batteries	Supercapacitors	Conventional capacitor
Energy density	30–40 W h kg^−1	1–10 W h kg^−1	<0.1 W h kg^−1
Power density	1000 W kg^−1	<10000 W kg^−1	<100000 W kg^−1
Life cycle	1000	>500000	>500000
Charging time	1–5 h	0.3–30 s	10^−3–10^−6 s
Discharging time	0.3–3 h	0.3–30 s	10^−3–10^−6 s
Charging/discharging efficiency	70–85%	85–98%	95%
Operating temperature	−20−100°C	−40–65°C	−20–65°C