Non-stoichiometric Mn doping in olivine lithium iron phosphate: structure and electrochemical properties

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dc.contributor.authorFeng, Cen_AU
dc.contributor.authorLi, HHen_AU
dc.contributor.authorDu, GDen_AU
dc.contributor.authorGuo, ZPen_AU
dc.contributor.authorSharma, Nen_AU
dc.contributor.authorPeterson, VKen_AU
dc.contributor.authorLi, HJen_AU
dc.date.accessioned2021-10-13T22:58:40Zen_AU
dc.date.available2021-10-13T22:58:40Zen_AU
dc.date.issued2011-02-02en_AU
dc.date.statistics2021-09-07en_AU
dc.description.abstractLiFePO4 and [Li0.918(10)Fe0.01][Fe0.99Mn0.01]PO4 or 1% Mn-doped LiFePO4 were synthesized by the one-step rheological phase reaction method using inexpensive FePO4 as the main raw material. Synchrotron X-ray diffraction, neutron powder diffraction, and transmission electron microscopy were used to characterize LiFePO4 and Mn-doped LiFePO4. Particle sizes were found to be distributed in the range of 0.5 to 1 μm and the carbon-content in the as-prepared samples was around 2 wt%. Rietveld analysis suggests 1 % Mn-doping replaces 1 % Fe from the Fe (M2) site and places this fraction of Fe on the Li (M1) site. The first process on the M2 site is isovalent doping (Mn2+ for Fe2+), while the second process on M2 is supervalent doping (Fe2+ for Li+). The second process requires that Li vacancies exist for charge balance and our simultaneous refinements against neutron and synchrotron X-ray diffraction data indicate an amount of Li vacancies consistent with this requirement. This doping regime agrees with the observed enhancement of the electrochemical properties of the Mn-doped LiFePO4 compared to the undoped LiFePO4. The Mn-doped LiFePO4 cathodes exhibit higher capacity and better cycling performance than the pure LiFePO4.en_AU
dc.identifier.citationFeng, C., Li. H., Du, G., Guo, A., Sharma, N., Peterson, V. K., & Liu, H. (2011). Non-stoichiometric Mn doping in olivine lithium iron phosphate: structure and electrochemical properties. Poster presented to the Australian and New Zealand Institutes of Physics 35th Annual Condensed Matter and Materials Meeting, Charles Sturt University, Wagga Wagga, NSW 2nd - 4th February, 2011. Retrieved from: https://physics.org.au/wp-content/uploads/cmm/2011/en_AU
dc.identifier.conferenceenddate4 February 2011en_AU
dc.identifier.conferencenameAustralian and New Zealand Institutes of Physics 35th Annual Condensed Matter and Materials Meetingen_AU
dc.identifier.conferenceplaceWagga Wagga, NSWen_AU
dc.identifier.conferencestartdate2 February 2011en_AU
dc.identifier.isbn978-0-646-55969-8en_AU
dc.identifier.otherWP12en_AU
dc.identifier.urihttps://physics.org.au/wp-content/uploads/cmm/2011/en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11952en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Physicsen_AU
dc.subjectStoichiometryen_AU
dc.subjectManganeseen_AU
dc.subjectCrystal dopingen_AU
dc.subjectOlivineen_AU
dc.subjectIron phosphatesen_AU
dc.subjectLithiumen_AU
dc.subjectChemical propertiesen_AU
dc.subjectParticlesen_AU
dc.subjectX-ray diffractionen_AU
dc.titleNon-stoichiometric Mn doping in olivine lithium iron phosphate: structure and electrochemical propertiesen_AU
dc.typeConference Posteren_AU
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