A facile preparation of three dimensional N, S co-doped graphene hydrogels with thiocarbohydrazide for electrode materials in supercapacitor
Three-dimensional (3D) N, S co-doped graphene hydrogels (NSGHs) were facilely prepared by using thiocarbohydrazide as reducing and doping agents in an aqueous solution. Due to their porous architectures, the as-prepared NSGHs all exhibited high specific capacitance of 123.4, 120.9 and 141.1Fg−1 at 0...
Saved in:
Published in: | Materials letters 2015-05, Vol.147, p.97-100 |
---|---|
Main Authors: | , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
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!
|
Summary: | Three-dimensional (3D) N, S co-doped graphene hydrogels (NSGHs) were facilely prepared by using thiocarbohydrazide as reducing and doping agents in an aqueous solution. Due to their porous architectures, the as-prepared NSGHs all exhibited high specific capacitance of 123.4, 120.9 and 141.1Fg−1 at 0.3Ag−1 for NSGHs-1, NSGHs-2, and NSGHs-5 in KOH electrolyte, respectively. Moreover, their specific capacitance can still be maintained for 72.3%, 59.4%, and 71.3% even with an increase of the discharging current density of 10Ag−1, respectively. Particularly, the NSGHs-5 based supercapacitor has exhibited excellent electrochemical stability and high degree of reversibility in the long-term cyclic test (90% retention after 4000 cycles).
•Three-dimensional N, S co-doped graphene hydrogels (NSGHs) were prepared.•NSGHs all exhibited high specific capacitance due to the porous architectures.•NSGHs based supercapacitors exhibited good electrochemical properties. |
---|---|
ISSN: | 0167-577X 1873-4979 |
DOI: | 10.1016/j.matlet.2015.02.031 |