In situ neutron diffraction study on layered oxides Na0.5Ni0.25Mn0.75O2

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dc.contributor.authorLiu, Jen_AU
dc.contributor.authorDidier, Cen_AU
dc.contributor.authorSale, Men_AU
dc.contributor.authorSharma, Nen_AU
dc.contributor.authorGuo, ZPen_AU
dc.contributor.authorPeterson, VKen_AU
dc.contributor.authorLing, CDen_AU
dc.date.accessioned2023-05-05T01:36:35Zen_AU
dc.date.available2023-05-05T01:36:35Zen_AU
dc.date.issued2020-11-11en_AU
dc.date.statistics2023-05-02en_AU
dc.description.abstractLayered oxides based on first-row transition metals dominate cathode materials for commercial batteries and remain highly interesting as well as challenging in their structural study during electrochemical reactions. Neutron diffraction is a powerful method to obtain periodic structural information complementary to that obtained by X-ray diffraction. Although inferior to X-ray diffraction in signal resolution, neutron diffraction reveals more reliable structural evolution as the whole bulk of materials are fluxed with neutron beam. Na0.5Ni0.25Mn0.75O2 is a potential sodium ion battery cathode due to its high operating voltage 3.2 V vs Na+/Na and high capacity 130 mAh/g. Its stoichiometry is designed to only utilize the redox couple Ni4+/Ni2+ to avoid the unstable redox couple Mn4+/Mn3+. The high voltage phase for this material has been under debate. The fact that sodium-containing layered oxides are highly hydroscopic, especially at low sodium content, makes it hard to study the final phase ex situ. In the work presented here, we have pushed the signal resolution of in situ neutron diffraction to the limit by loading the optimized material mass at the positive side and the corresponding amount of amorphous hard carbon at the negative side of a pouch cell. The result is the first robust proof of the reversible structural evolution from P3, O3 to O3s on charging and back to O3, P3 on discharging. © 2020 The authors.en_AU
dc.identifier.citationLiu, J., Didier, C., Sale, M., Sharma, N., Guo, Z., Peterson., V., & Ling, C. (2020). In situ neutron diffraction study on layered oxides Na0.5Ni0.25Mn0.75O2. Paper presented to the ANBUG-AINSE Neutron Scattering Symposium, AANSS 2020, Virtual Meeting, 11th - 13th November 2020. (pp. 90). Retrieved from: https://events01.synchrotron.org.au/event/125/attachments/725/1149/AANSS_Abstract_Booklet_Complete_-_1_Page_Reduced.pdfen_AU
dc.identifier.conferenceenddate13 November 2020en_AU
dc.identifier.conferencenameANBUG-AINSE Neutron Scattering Symposium, AANSS 2020en_AU
dc.identifier.conferenceplaceVirtual Meetingen_AU
dc.identifier.conferencestartdate11 November 2020en_AU
dc.identifier.pagination90en_AU
dc.identifier.urihttps://events01.synchrotron.org.au/event/125/contributions/3767/contribution.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/15007en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Nuclear Science and Engineering (AINSE)en_AU
dc.subjectOxidesen_AU
dc.subjectMetalsen_AU
dc.subjectCathodesen_AU
dc.subjectNeutronsen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectStoichiometryen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectCarbonen_AU
dc.subjectSodiumen_AU
dc.subjectEvolutionen_AU
dc.titleIn situ neutron diffraction study on layered oxides Na0.5Ni0.25Mn0.75O2en_AU
dc.typeConference Abstracten_AU
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