Cover Image

Critical Influence of Reduced Graphene Oxide Mediated Binding of M (M = Mg, Mn) with Co ions, Chemical Stability and Charge Storability Enhancements of Spinal-Type Hierarchical MCo2O4 Nanostructures

This paper reports that addition of reduced graphene oxide (rGO) in MgCo2O4 improves the binding of Mg with Co thereby minimizing magnesium dissolution in aqueous alkaline electrolytes and the resulting MgCo2O4/rGO electrodes offered impressive improvements in charge storage properties. An isostru...

Full description

Saved in:
Bibliographic Details
Main Authors: Krishnan, Syam G., Harilal, Midhun, Yar, Asfand, Vijayan, Bincy Lathakumary, Dennis, John Ojur, M. M., Yusoff, Rajan, Jose
Format: Article
Language:English
Published: Elsevier 2017
Subjects:
QC Physics
QD Chemistry
TK Electrical engineering. Electronics Nuclear engineering
Online Access:http://umpir.ump.edu.my/id/eprint/17865/1/MgCo2O4%20rGO.pdf
http://umpir.ump.edu.my/id/eprint/17865/
https://doi.org/10.1016/j.electacta.2017.05.064
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper reports that addition of reduced graphene oxide (rGO) in MgCo2O4 improves the binding of Mg with Co thereby minimizing magnesium dissolution in aqueous alkaline electrolytes and the resulting MgCo2O4/rGO electrodes offered impressive improvements in charge storage properties. An isostructural high performing material, MnCo2O4, is used as a benchmark material in this work. The Mg analogues stored >30% more charges than the Mn-analogues in the 3 M LiOH electrolyte despite the former's lower BET surface area; rGO modification further increased charge storage by >60% than the unmodified analogues. Electrochemical measurements show that a larger surface fraction of the Mg analogue is electrochemically active, irrespective of whether or not rGO is present, which arise from, typically for MgCo2O4/rGO, lower internal resistance, lower Warburg impedance, and lower charge transfer resistance than the other electrodes.

Similar Items