Sustainable fabrication of nitrogen activated carbon from chlorella vulgaris for energy storage devices

Porous carbons were successfully prepared from nitrogen containing microalgae by the carbonization and KOH activation processes. The materials thus synthesized showed surface areas ranging from 1210 to 2433 m(2)/g and nitrogen contents ranging from 21.8 to 1.40 wt.% due to the use of N-rich microalgae as a carbon precursor. The samples synthesized at 700 degrees C with char: hydroxide = 1: 5 exhibited excellent endurance, with specific capacitances of 117 F/g at 0.5 A/g.