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...

全面介紹

Saved in:
書目詳細資料
Main Authors: Krishnan, Syam G., Harilal, Midhun, Yar, Asfand, Vijayan, Bincy Lathakumary, Dennis, John Ojur, M. M., Yusoff, Rajan, Jose
格式: Article
語言:English
出版: Elsevier 2017
主題:
在線閱讀: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
標簽: 添加標簽
沒有標簽, 成為第一個標記此記錄!
實物特徵
總結: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.