title: Supercapacitors from Activated Carbon Derived from Granatum.
abstract: Granatum carbon (GC) as electrode materials for supercapacitors is prepared via the chemical activation with different activating agent such as ZnC2 and KOH with an intention to improve the surface area and their electrochemical performance. The structure and electrochemical properties of GC materials are characterized with N2 adsorption/desorption measurements, scanning electron microscope (SEM), cyclic voltammetry (CV), galvanostatic charge/discharge cycling and electrochemical impedance spectroscopy (EIS). The obtained results show that the specific surface area of the granatum-based activated carbons increased obviously from 573 m2 x g(-1) to 1341 m2 x g(-1) by ZnC2 activation and to 930 m2 x g(-1) by KOH treatment. Furthermore, GCZ also delivers specific capacitance of 195.1 Fx g(-1) at the current density of 0.1 A x g(-1) in 30 wt.% KOH aqueous electrolyte and low capacitance loss of 28.5% when the current density increased by 10 times.
authors.forename: Qiannan
authors.initials: Q
authors.lastname: Wang
authors.forename: Lin
authors.initials: L
authors.lastname: Yang
authors.forename: Zhao
authors.initials: Z
authors.lastname: Wang
authors.forename: Kexun
authors.initials: K
authors.lastname: Chen
authors.forename: Lipeng
authors.initials: L
authors.lastname: Zhang