Hierarchical porous activated carbon produced from spinach leaves as an electrode material for an electric double layer capacitor

Hierarchical porous activated carbon (AC) was obtained by the carbonization of dried spinach leaves followed by activation with KOH. The product was characterized by nitrogen adsorption, FT-IR, FE-SEM and electrochemical tests. The AC has a dominant number of micropores, a medium number of mesopores...

Full description

Saved in:
Bibliographic Details
Published in:New carbon materials 2014-06, Vol.29 (3), p.209-215
Main Authors: Ou, Yu-jing, Peng, Chao, Lang, Jun-wei, Zhu, Dan-dan, Yan, Xing-bin
Format: Article
Language:chi ; eng
Subjects:
Activated carbon
Activation
Energy density
Spinach leaves
Supercapcitor
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Hierarchical porous activated carbon (AC) was obtained by the carbonization of dried spinach leaves followed by activation with KOH. The product was characterized by nitrogen adsorption, FT-IR, FE-SEM and electrochemical tests. The AC has a dominant number of micropores, a medium number of mesopores and a few macropores with a specific surface area up to 2616 m2/g and a large number of oxygen-containing functional groups. The AC electrode exhibits a good double-layer capacitive behavior with a specific capacitance of 238 F/g in a 2 mol/L KOH electrolyte. A supercapacitor made of the AC has a high energy density of 10.1 Wh/Kg at a current density of 0.5 A/g and an excellent cyclic stability for 2 000 cycles over a potential range from 0 to 1.2 V.
ISSN:1872-5805
1872-5805
DOI:10.1016/S1872-5805(14)60135-9