In-situ XRD study of a Chromium doped LiNi0.5Mn1.5O4 cathode for Li-ion battery

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dc.contributor.authorChladil, Ladislavcs
dc.contributor.authorKunický, Danielcs
dc.contributor.authorKazda, Tomášcs
dc.contributor.authorVanýsek, Petrcs
dc.contributor.authorČech, Ondřejcs
dc.contributor.authorBača, Petrcs
dc.coverage.issue9cs
dc.coverage.volume41cs
dc.date.accessioned2022-01-07T11:54:40Z
dc.date.available2022-01-07T11:54:40Z
dc.date.issued2021-09-01cs
dc.description.abstractThis paper deals with structural (in-situ XRD) and electrochemical characterization of high-voltage lithium-ion cathode materials LiMn2O4 (LMO), LiNi0.5Mn1.5O4 (LNMO), and LiCr0.1Ni0.4Mn1.5O4 (LCNMO) prepared by solid-state synthesis. Structural in-situ X-ray diffraction spectra were measured by an affordable Rigaku diffractometer. Our synthesis route produced the samples with similar morphologies where the average particle sizes were 1.11 mu m and 1.46 mu m for LNMO and LCNMO respectively. Results of the Rietveld analysis brought detailed insight into two-phase structure transitions for LMO and three-phase transitions for LNMO and LCNMO. XRD study revealed differences in the structural behavior of LMO and LNMO prepared by solid-state synthesis compared to the results of other authors using the sol-gel synthesis route. In the case of chromium-doped LNMO, our results indicate ability of the chromium metal to effectively reduce Mn3+ content while the ordering of the structure increases. Chromium doping also promotes a larger lattice parameter in a fully delithiated state than in the case of undoped LNMO. Therefore, lowering of the volume changes was observed and faster phase II/III transition taking place, when Ni3+/Ni4+ redox pair was oxidized, was also identified. Cr doping of LNMO also promotes the reaching the lattice parameters of phases in both phase transitions and thus could reduce the internal stress of active material under high C-rate cycling. Results thus suggested that chromium doping can improve the stability of the inner structure and performance at higher charging C-rates even though the structure goes through a three-phase region during charging as undoped LNMO. The evaluation of diffusion coefficients of Cr-doped LNMO revealed increased diffusivity in a full discharge state and as the cathode underwent the cycling the differences in diffusivity seemed to be more pronounced.en
dc.description.embargo2023-07-30cs
dc.formattextcs
dc.format.extent1-15cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationJournal of Energy Storage. 2021, vol. 41, issue 9, p. 1-15.en
dc.identifier.doi10.1016/j.est.2021.102907cs
dc.identifier.issn2352-152Xcs
dc.identifier.orcid0000-0002-3332-4306cs
dc.identifier.orcid0000-0002-0981-6503cs
dc.identifier.orcid0000-0003-1973-0292cs
dc.identifier.orcid0000-0002-5458-393Xcs
dc.identifier.orcid0000-0002-7878-5819cs
dc.identifier.orcid0000-0001-9793-9767cs
dc.identifier.other172900cs
dc.identifier.researcheridA-2636-2016cs
dc.identifier.researcheridA-1949-2016cs
dc.identifier.researcheridAAS-5283-2020cs
dc.identifier.researcheridH-7547-2018cs
dc.identifier.scopus55775728400cs
dc.identifier.scopus56574103900cs
dc.identifier.scopus7004078600cs
dc.identifier.scopus7004123643cs
dc.identifier.urihttp://hdl.handle.net/11012/203267
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofJournal of Energy Storagecs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S2352152X21006253cs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2352-152X/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectIn-situ XRD studyen
dc.subjectHigh-voltage cathodeen
dc.subjectPhase transitionen
dc.subjectStructure disordering stability improvingen
dc.subjectLNMOen
dc.subjectLithium nickel manganese oxideen
dc.subjectDiffusion coefficienten
dc.subjectElectrochemical impedance spectroscopyen
dc.subjectEISen
dc.titleIn-situ XRD study of a Chromium doped LiNi0.5Mn1.5O4 cathode for Li-ion batteryen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionacceptedVersionen
sync.item.dbidVAV-172900en
sync.item.dbtypeVAVen
sync.item.insts2023.08.01 12:58:26en
sync.item.modts2023.08.01 12:20:06en
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. oddělení-ETE-CVVOZEcs
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