Lithium intercalation reactions with transition metal oxides

dc.contributor.advisorThackeray, Michaelen_ZA
dc.contributor.advisorNassimbeni, Luigi Ren_ZA
dc.contributor.authorGummow, Rosalind Juneen_ZA
dc.date.accessioned2016-04-20T14:14:12Z
dc.date.available2016-04-20T14:14:12Z
dc.date.issued1993en_ZA
dc.description.abstractAn investigation of several lithium transition metal oxide systems has been undertaken with the aim of synthesising an optimised LiM0₂ compound (M = Mn, Co or Co/Ni mixtures) for application as a cathode in rechargeab1e lithium batteries. Attention has been focused on systems which show promise for application as cathodes in rocking-chair cells which do not contain metallic lithium anodes. A novel lithium cobalt oxide, LT-LiCoO₂ (LT for low temperature), has been synthesised at 400°C. This compound has near-cubic symmetry and can be indexed to either a trigonal unit cell (space group R3m) with a=2.830(1)Å and c=l3.875(8) Å, or to a face-centred cubic unit cell (space group Fd3m) with a=8.002(1)A. The near-cubic symmetry is maintained on delithiation. Neutron and X-ray powder diffraction refinement of the LT-LiCoO₂ sample has shown it to be best described as a layered structure (R3m symmetry) with approximately 6% of the cobalt cations in the predominantly lithium layer and vice versa. An acid-leached sample LT-Liₒ₄.4CoO₂ was, however, shown to have a defect spinel structure.en_ZA
dc.identifier.apacitationGummow, R. J. (1993). <i>Lithium intercalation reactions with transition metal oxides</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Chemistry. Retrieved from http://hdl.handle.net/11427/19039en_ZA
dc.identifier.chicagocitationGummow, Rosalind June. <i>"Lithium intercalation reactions with transition metal oxides."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Chemistry, 1993. http://hdl.handle.net/11427/19039en_ZA
dc.identifier.citationGummow, R. 1993. Lithium intercalation reactions with transition metal oxides. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Gummow, Rosalind June AB - An investigation of several lithium transition metal oxide systems has been undertaken with the aim of synthesising an optimised LiM0₂ compound (M = Mn, Co or Co/Ni mixtures) for application as a cathode in rechargeab1e lithium batteries. Attention has been focused on systems which show promise for application as cathodes in rocking-chair cells which do not contain metallic lithium anodes. A novel lithium cobalt oxide, LT-LiCoO₂ (LT for low temperature), has been synthesised at 400°C. This compound has near-cubic symmetry and can be indexed to either a trigonal unit cell (space group R3m) with a=2.830(1)Å and c=l3.875(8) Å, or to a face-centred cubic unit cell (space group Fd3m) with a=8.002(1)A. The near-cubic symmetry is maintained on delithiation. Neutron and X-ray powder diffraction refinement of the LT-LiCoO₂ sample has shown it to be best described as a layered structure (R3m symmetry) with approximately 6% of the cobalt cations in the predominantly lithium layer and vice versa. An acid-leached sample LT-Liₒ₄.4CoO₂ was, however, shown to have a defect spinel structure. DA - 1993 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1993 T1 - Lithium intercalation reactions with transition metal oxides TI - Lithium intercalation reactions with transition metal oxides UR - http://hdl.handle.net/11427/19039 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/19039
dc.identifier.vancouvercitationGummow RJ. Lithium intercalation reactions with transition metal oxides. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Chemistry, 1993 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/19039en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Chemistryen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherChemistryen_ZA
dc.titleLithium intercalation reactions with transition metal oxidesen_ZA
dc.typeDoctoral Thesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationnamePhDen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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