Electrochemical Reduction and Deposition of Reduced Graphene Oxide/Manganese Oxide Composite for Supercapacitor Applications via Pulse-Chronoamperometry
The reduced graphene oxide/manganese oxide composite was deposited on the nickel current collector using the Pulse-Chronoamperometry method in a mixture of graphene oxide dispersion and manganese acetate as the precursor. The graphene oxide (GO) was electrochemically reduced to reduced graphene o...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | en |
| Published: |
UTHM Publisher
2017
|
| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/21898/7/Electrochemical.pdf http://ir.unimas.my/id/eprint/21898/ http://penerbit.uthm.edu.my/ojs/index.php/JST/article/view/1992 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | The reduced graphene oxide/manganese oxide composite was deposited on the nickel current
collector using the Pulse-Chronoamperometry method in a mixture of graphene oxide dispersion and
manganese acetate as the precursor. The graphene oxide (GO) was electrochemically reduced to reduced
graphene oxide (rGO) and deposited with manganese oxide (MnOx) at the same time. The effects of
manganese acetate (Mn(Ac)2) concentration, deposition temperature, voltage and time on the specific
capacitance of rGO/MnOx electrode were investigated. The electrochemical properties were characterized
using galvanostatic charge-discharge and cyclic voltammetry. The effects of electrochemical reduction and
deposition parameters on the specific capacitance of rGO/MnOx electrode were studied using Central
Composite Design methodology and a 2 factors interaction model equation was evaluated. The rGO/MnOx
electrode synthesized using 0.2 M of Mn(Ac)2, at 70 °C and -1.0 V versus Saturated Calomel Electrode
(SCE) with a total deposition time of 800s exhibited a specific capacitance of 665 F/g was obtained at the
current density of 5 A/g. The high specific capacitance of rGO/MnOx electrode showed its potential
application for the fabrication of supercapacitors. This study provides an environmental friendly, time
effective and costs efficiency way to reduce graphene oxide and to deposit the rGO/MnOx composite for
electrochemical energy storage application. |
|---|