Transition Metal Oxides for Cathode of Li-ion Battery

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.

Grantor dc:publisher

UNSW, Sydney

Year dc:date

2025

Author dc:creator

• Tseng, Yu-Fu

• Transition Metal Oxides
• Cathode
• Li-ion Battery
• anzsrc-for: 4016 Materials engineering

Statement dc:rights

• open access
• CC BY 4.0
• free_to_read

Licence

• https://purl.org/coar/access_right/c_abf2
• https://creativecommons.org/licenses/by/4.0/

Language dc:language

en

Identifier

https://doi.org/10.26190/unsworks/30886

OAI identifier oai:identifier

oai:unsworks.library.unsw.edu.au:1959.4/104185