Status of Biomass Derived Carbon Materials for Supercapacitor Application

Table 3

The capacitance and surface area of porous carbon derived from different animal wastes.

Precursor	Activating agent	Activating; temperature (°C)	BET (m^2/g)	Specific capacitance (F/g)	Current density (A/g)	Cyclic stability	Electrolyte	Reference
Cow dung	KOH	800	2000	117	1	85% (at 1000 cycles)	Et4NBF4	[55]
Animal bones	HNO3	—	2157	130	100		—	[56]
Bovine cortical bones		—	1383	134			2 M KNO3	[57]
Chicken egg membrane	Air	300	221	297; 284	4	96% (at 10000 cycles)	1 M KOH; 1 M H2SO4	[58]
Human hair	KOH	900	1306	304	1	98% (at 20000 cycles)		[59]
Fish scale			2273	109	10		—	[60]
Chicken feathers	KOH	800	1839	168	10	83% (at 5000 cycles)	1 M H2SO4	[61]
Egg yolk	KOH	900	2277.79	220.37	20	97.7 (at 2000 cycles)	6 M KOH	[62]

Two-electrode cell and three-electrode cell.