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...
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| Format: | Article |
| Language: | English |
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Elsevier
2017
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| Online Access: | http://umpir.ump.edu.my/id/eprint/17865/ http://umpir.ump.edu.my/id/eprint/17865/1/MgCo2O4%20rGO.pdf |
| _version_ | 1848820533794177024 |
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| author | Krishnan, Syam G. Harilal, Midhun Yar, Asfand Vijayan, Bincy Lathakumary Dennis, John Ojur M. M., Yusoff Rajan, Jose |
| author_facet | Krishnan, Syam G. Harilal, Midhun Yar, Asfand Vijayan, Bincy Lathakumary Dennis, John Ojur M. M., Yusoff Rajan, Jose |
| author_sort | Krishnan, Syam G. |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-15T02:10:58Z |
| format | Article |
| id | ump-17865 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T02:10:58Z |
| publishDate | 2017 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-178652018-07-27T01:29:47Z http://umpir.ump.edu.my/id/eprint/17865/ 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 Krishnan, Syam G. Harilal, Midhun Yar, Asfand Vijayan, Bincy Lathakumary Dennis, John Ojur M. M., Yusoff Rajan, Jose QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering 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. Elsevier 2017-05-11 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/17865/1/MgCo2O4%20rGO.pdf Krishnan, Syam G. and Harilal, Midhun and Yar, Asfand and Vijayan, Bincy Lathakumary and Dennis, John Ojur and M. M., Yusoff and Rajan, Jose (2017) 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. Electrochimica Acta, 243. pp. 119-128. (Published) https://doi.org/10.1016/j.electacta.2017.05.064 DOI: 10.1016/j.electacta.2017.05.064 |
| spellingShingle | QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering Krishnan, Syam G. Harilal, Midhun Yar, Asfand Vijayan, Bincy Lathakumary Dennis, John Ojur M. M., Yusoff Rajan, Jose 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 |
| title | 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 |
| title_full | 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 |
| title_fullStr | 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 |
| title_full_unstemmed | 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 |
| title_short | 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 |
| title_sort | 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 |
| topic | QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering |
| url | http://umpir.ump.edu.my/id/eprint/17865/ http://umpir.ump.edu.my/id/eprint/17865/ http://umpir.ump.edu.my/id/eprint/17865/ http://umpir.ump.edu.my/id/eprint/17865/1/MgCo2O4%20rGO.pdf |