Structural evidence for Mg-doped LiFePO4 electrode polarisation in commercial Li-ion batteries

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dc.contributor.authorGoonetilleke, Den_AU
dc.contributor.authorFaulkner, Ten_AU
dc.contributor.authorPeterson, VKen_AU
dc.contributor.authorSharma, Nen_AU
dc.date.accessioned2021-08-25T00:46:29Zen_AU
dc.date.available2021-08-25T00:46:29Zen_AU
dc.date.issued2018-08-01en_AU
dc.date.statistics2021-08-23en_AU
dc.description.abstractThe reaction evolution and kinetics of the LiFePO4 positive electrode material is dependent on the synthesis method and cycling conditions. In operando neutron powder diffraction is used investigate the structure-electrochemistry relationship of the electrode materials in a Valence Technology Inc. 18650 Energy cell (IFR18650EC) containing a graphite negative electrode and a Mg-doped LiFePO4 (Li(MgFe)PO4) positive electrode. Two cells were studied at ambient (298 K) and elevated (323 K) temperature, and higher temperatures were found to improve reaction kinetics and hence capacity. Rietveld refinement of structural models against the diffraction data revealed information about the nucleation of the lithiated and delithiated phases in the Li(MgFe)PO4 positive electrode material as a function of each cell's state of charge. Polarisation was indicated by a shift in the potential at which the lithiated and delithiated (MgFe)PO4 phases nucleate during cycling, the extent of which was found to be linearly proportional to the applied current. This work provides new evidence for polarisation of the positive electrode material in a Li-ion battery system. © 2018 Elsevier B.V.en_AU
dc.identifier.citationGoonetilleke, D., Faulkner, T., Peterson, V. K., & Sharma, N. (2018). Structural evidence for Mg-doped LiFePO4 electrode polarisation in commercial Li-ion batteries. Journal of Power Sources, 394, 1-8. doi:10.1016/j.jpowsour.2018.05.024en_AU
dc.identifier.issn0378-7753en_AU
dc.identifier.journaltitleJournal of Power Sourcesen_AU
dc.identifier.pagination45139en_AU
dc.identifier.urihttps://doi.org/10.1016/j.jpowsour.2018.05.024en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11487en_AU
dc.identifier.volume394en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectElectrodesen_AU
dc.subjectCathodesen_AU
dc.subjectPolarizationen_AU
dc.subjectLithium ionsen_AU
dc.subjectElectric batteriesen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectElectrochemistryen_AU
dc.titleStructural evidence for Mg-doped LiFePO4 electrode polarisation in commercial Li-ion batteriesen_AU
dc.typeJournal Articleen_AU
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