Capacity enhancement of the quenched Li-Ni-Mn-Co oxide high-voltage Li-ion battery positive electrode

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dc.contributor.authorJena, Aen_AU
dc.contributor.authorLee, CHen_AU
dc.contributor.authorPang, WKen_AU
dc.contributor.authorPeterson, VKen_AU
dc.contributor.authorSharma, Nen_AU
dc.contributor.authorWang, CCen_AU
dc.contributor.authorSong, YFen_AU
dc.contributor.authorLin, CCen_AU
dc.contributor.authorChang, Hen_AU
dc.contributor.authorLiu, RSen_AU
dc.date.accessioned2021-08-27T00:39:17Zen_AU
dc.date.available2021-08-27T00:39:17Zen_AU
dc.date.issued2017-03-23en_AU
dc.date.statistics2021-08-25en_AU
dc.description.abstractLi-rich metal oxides, regarded as a high-voltage composite cathode, is currently one of the hottest positive electrode material for lithium-ion batteries, due to its high-capacity and high-energy performance. The crystallography, phase composition and morphology can be altered by synthesis parameters, which can influence drastically the capacity and cycling performance. In this work, we demonstrate Li1.207Ni0.127Mn0.54Co0.127O2, obtained by a co-precipitation method, exhibits super-high specific capacity up to 298 mAh g−1 and excellent capacity retention of ∼100% up to 50 cycles. Using neutron powder diffraction and transmission X-ray microscopy, we have found that the cooling-treatments applied after sintering during synthesis are crucially important in controlling the phase composition and morphology of the cathodes, thereby influencing the electrochemical performance. Unique spherical microstructure, larger lattice, and higher content of Li-rich monoclinic component can be achieved in the rapid quenching process, whereas severe particle cracking along with the smaller lattice and lower monoclinic component content is obtained when natural cooling of the furnace is applied. Combined with electrochemical impedance spectra, a plausible mechanism is described for the poorer specific capacity and cycling stability of the composite cathodes. © 2017 Elsevier Ltd.en_AU
dc.identifier.citationJena, A., Lee, C.-H., Pang, W. K., Peterson, V. K., Sharma, N., Wang, C.-C., Song, Y.-F., Lin, C.-C., Chang, H. & Liu, R. S. (2017). Capacity enhancement of the quenched Li-Ni-Mn-Co oxide high-voltage Li-ion battery positive electrode. Electrochimica Acta, 236, 10-17. doi:10.1016/j.electacta.2017.03.163en_AU
dc.identifier.issn0013-4686en_AU
dc.identifier.journaltitleElectrochimica Actaen_AU
dc.identifier.pagination10-17en_AU
dc.identifier.urihttps://doi.org/10.1016/j.electacta.2017.03.163en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11531en_AU
dc.identifier.volume236en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectCathodesen_AU
dc.subjectElectrodesen_AU
dc.subjectLithiumen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectMicroscopyen_AU
dc.subjectCapacityen_AU
dc.subjectElectric batteriesen_AU
dc.subjectElectric potentialen_AU
dc.titleCapacity enhancement of the quenched Li-Ni-Mn-Co oxide high-voltage Li-ion battery positive electrodeen_AU
dc.typeJournal Articleen_AU
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