{"id":{"repo_id":"unsw","oai_identifier":"oai:unsworks.library.unsw.edu.au:1959.4/104185"},"canonical_url":"https://search.dev.ndltd.org/etd/unsw/oai:unsworks.library.unsw.edu.au:1959.4/104185","repository":{"repo_id":"unsw","name":"University of New South Wales","base_url":"https://unsworks.unsw.edu.au/oai/provider"},"display":{"title":"Transition Metal Oxides for Cathode of Li-ion Battery","abstract":"Layered transition metal oxides are used as cathode materials in Li-ion batteries particularly in those used in the automobile industry. With growing demands for high energy supply for practical applications, Ni -rich cathodes have become a popular option due to their high theoretical capacity; however, these materials suffer from low cyclic stability, which has limited their applicability. The present work investigates the fabrication and performance of Ni -rich (> 88%) LiNixMnyO2 cathode materials with Mg dopant addition in low concentrations (≤ 2 at%). The samples were produced by co-precipitation followed by heat treatment in air at 850°C with the goal to investigate the effect of dopant addition on cyclic stability and energy capacity. The morphology, crystallography, surface chemistry and elemental composition of the undoped and doped compositions were investigated using SEM, XRD, XPS, and ICP-MS respectively; electrochemical performance tests were conducted to determine the energy capacity, stability, electrochemical impedance and diffusion rates. Differences in cation mixing degree were observed with variations in the dopant addition level and this was reflective of differences in substitution mechanisms. The particles were sub-angular in morphology with uniform distributions of Ni, Mn, and dopant Mg.","abstract_html":"Layered transition metal oxides are used as cathode materials in Li-ion batteries particularly in those used in the automobile industry. With growing demands for high energy supply for practical applications, Ni -rich cathodes have become a popular option due to their high theoretical capacity; however, these materials suffer from low cyclic stability, which has limited their applicability. The present work investigates the fabrication and performance of Ni -rich (> 88%) LiNixMnyO2 cathode materials with Mg dopant addition in low concentrations (≤ 2 at%). The samples were produced by co-precipitation followed by heat treatment in air at 850°C with the goal to investigate the effect of dopant addition on cyclic stability and energy capacity. The morphology, crystallography, surface chemistry and elemental composition of the undoped and doped compositions were investigated using SEM, XRD, XPS, and ICP-MS respectively; electrochemical performance tests were conducted to determine the energy capacity, stability, electrochemical impedance and diffusion rates. Differences in cation mixing degree were observed with variations in the dopant addition level and this was reflective of differences in substitution mechanisms. The particles were sub-angular in morphology with uniform distributions of Ni, Mn, and dopant Mg.","abstract_has_math":false,"creators":["Tseng, Yu-Fu"],"institution":"UNSW, Sydney","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2025,"date_issued":"2025","date_published":"2025","updated_at":"2026-07-24T05:32:14Z","subjects":["Transition Metal Oxides","Cathode","Li-ion Battery","anzsrc-for: 4016 Materials engineering"],"languages":["en"],"rights":["open access","CC BY 4.0","free_to_read"],"rights_urls":["https://purl.org/coar/access_right/c_abf2","https://creativecommons.org/licenses/by/4.0/"],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["https://doi.org/10.26190/unsworks/30886"],"render_values":[{"text":"https://doi.org/10.26190/unsworks/30886","href":"https://doi.org/10.26190/unsworks/30886","code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/1959.4/104185","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Tseng, Yu-Fu"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2025"]},{"key":"dc:publisher","label":"Institution","values":["UNSW, Sydney"]},{"key":"dc:type","label":"Dc Type","values":["master thesis","http://purl.org/coar/resource_type/c_bdcc"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Transition Metal Oxides","Cathode","Li-ion Battery","anzsrc-for: 4016 Materials engineering"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["open access","https://purl.org/coar/access_right/c_abf2","CC BY 4.0","https://creativecommons.org/licenses/by/4.0/","free_to_read"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/1959.4/104185","https://unsworks.unsw.edu.au/bitstreams/eb7d9619-e672-4611-9c9c-470c93a9350e/download","https://doi.org/10.26190/unsworks/30886"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Layered transition metal oxides are used as cathode materials in Li-ion batteries particularly in those used in the automobile industry. With growing demands for high energy supply for practical applications, Ni -rich cathodes have become a popular option due to their high theoretical capacity; however, these materials suffer from low cyclic stability, which has limited their applicability. The present work investigates the fabrication and performance of Ni -rich (> 88%) LiNixMnyO2 cathode materials with Mg dopant addition in low concentrations (≤ 2 at%). The samples were produced by co-precipitation followed by heat treatment in air at 850°C with the goal to investigate the effect of dopant addition on cyclic stability and energy capacity. The morphology, crystallography, surface chemistry and elemental composition of the undoped and doped compositions were investigated using SEM, XRD, XPS, and ICP-MS respectively; electrochemical performance tests were conducted to determine the energy capacity, stability, electrochemical impedance and diffusion rates. Differences in cation mixing degree were observed with variations in the dopant addition level and this was reflective of differences in substitution mechanisms. The particles were sub-angular in morphology with uniform distributions of Ni, Mn, and dopant Mg."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Transition Metal Oxides for Cathode of Li-ion Battery"]}]}],"canonical_facts":{"dc:creator":["Tseng, Yu-Fu"],"dc:date":["2025"],"dc:description":["Layered transition metal oxides are used as cathode materials in Li-ion batteries particularly in those used in the automobile industry. With growing demands for high energy supply for practical applications, Ni -rich cathodes have become a popular option due to their high theoretical capacity; however, these materials suffer from low cyclic stability, which has limited their applicability. The present work investigates the fabrication and performance of Ni -rich (> 88%) LiNixMnyO2 cathode materials with Mg dopant addition in low concentrations (≤ 2 at%). The samples were produced by co-precipitation followed by heat treatment in air at 850°C with the goal to investigate the effect of dopant addition on cyclic stability and energy capacity. The morphology, crystallography, surface chemistry and elemental composition of the undoped and doped compositions were investigated using SEM, XRD, XPS, and ICP-MS respectively; electrochemical performance tests were conducted to determine the energy capacity, stability, electrochemical impedance and diffusion rates. Differences in cation mixing degree were observed with variations in the dopant addition level and this was reflective of differences in substitution mechanisms. The particles were sub-angular in morphology with uniform distributions of Ni, Mn, and dopant Mg."],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/1959.4/104185","https://unsworks.unsw.edu.au/bitstreams/eb7d9619-e672-4611-9c9c-470c93a9350e/download","https://doi.org/10.26190/unsworks/30886"],"dc:language":["en"],"dc:publisher":["UNSW, Sydney"],"dc:rights":["open access","https://purl.org/coar/access_right/c_abf2","CC BY 4.0","https://creativecommons.org/licenses/by/4.0/","free_to_read"],"dc:subject":["Transition Metal Oxides","Cathode","Li-ion Battery","anzsrc-for: 4016 Materials engineering"],"dc:title":["Transition Metal Oxides for Cathode of Li-ion Battery"],"dc:type":["master thesis","http://purl.org/coar/resource_type/c_bdcc"]},"updated_at":"2026-07-24T05:32:14Z"}