Rate and composition dependence on the structural–electrochemical relationships in P2–Na2/3Fe1–yMnyO2 positive electrodes for sodium-ion batteries

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dc.contributor.authorDose, WMen_AU
dc.contributor.authorSharma, Nen_AU
dc.contributor.authorPramudita, JCen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorGonzalo, Een_AU
dc.contributor.authorRojo, Ten_AU
dc.date.accessioned2021-02-03T23:31:57Zen_AU
dc.date.available2021-02-03T23:31:57Zen_AU
dc.date.issued2018-10-02en_AU
dc.date.statistics2021-01-19en_AU
dc.description.abstractStructural–electrochemical compositional evolution of attractive cathode candidates for sodium-ion batteries is illustrated. Varying the Fe/Mn ratio plays a significant role in phase evolution, which ranges from a simple solid solution or two-phase transitions to more complex combinations and sequences of phase transitions dependent on the Na concentration. Further complexity is added by the kinetic limitations placed on the compositions with applied current and associated material utilization. This work provides a standardized set of electrochemical and structural data for members of the Na2/3Fe1–yMnyO2 series, exploring the phase evolution at a selected rate of 15 mA g–1, comparing this with literature data at various current rates, and focusing on the evolution of the y = 0.9 at higher and lower current rates. The y = 0.8 composition shows the highest capacity, while y = 0.9 shows slightly better capacity retention at 15 mA g–1. Structurally, the y = 0.8 features a solid-solution evolution throughout the charge–discharge process, while the y = 0.9 shows a solid solution and two-phase evolution, yet shows better capacity retention. Such studies illustrate how chemical tuning and electrochemical current influences structural evolution with sodium insertion/extraction and how this in turn influences electrochemical performance. © 2018 American Chemical Societyen_AU
dc.identifier.citationDose, W. M., Sharma, N., Pramudita, J. C., Avdeev, M., Gonzalo, E., & Rojo, T. (2018). Rate and composition dependence on the structural–electrochemical relationships in P2–Na2/3Fe1–yMnyO2 positive electrodes for sodium-ion batteries. Chemistry of Materials, 30(21), 7503–7510. doi:10.1021/acs.chemmater.8b02456en_AU
dc.identifier.issn1520-5002en_AU
dc.identifier.issue21en_AU
dc.identifier.journaltitleChemistry of Materialsen_AU
dc.identifier.pagination7503-7510en_AU
dc.identifier.urihttps://doi.org/10.1021/acs.chemmater.8b02456en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10300en_AU
dc.identifier.volume30en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectCrystal latticesen_AU
dc.subjectSodiumen_AU
dc.subjectTransition elementsen_AU
dc.subjectPhase transformationsen_AU
dc.subjectElectric batteriesen_AU
dc.subjectSolid solutionsen_AU
dc.titleRate and composition dependence on the structural–electrochemical relationships in P2–Na2/3Fe1–yMnyO2 positive electrodes for sodium-ion batteriesen_AU
dc.typeJournal Articleen_AU
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