Effect of Ni2+ on Lithium-Ion Diffusion in Layered LiNi1−x−yMnxCoyO2 Materials
Zhu Yuanyuan, Yang Huang, Rong Du, Ming Tang, Bao‐Tian Wang, Junrong Zhang
Abstract
LiNi1−x−yMnxCoyO2 materials are a typical class of layered cathode materials with excellent electrochemical performance in lithium-ion batteries. Molecular dynamics simulations are performed for LiNi1−x−yMnxCoyO2 materials with different transition metal ratios. The Li/Ni exchange ratio, ratio of anti-site Ni2+ to total Ni2+, and diffusion coefficient of Li ions in these materials are calculated. The results show that the Li-ion diffusion coefficient strongly depends on the ratio of anti-site Ni2+ to total Ni2+ because their variation tendencies are similar. In addition, the local coordination structure of the Li/Ni anti-site is analyzed.
Topics & Concepts
Lithium (medication)DiffusionIonElectrochemistryMaterials scienceMetalTransition metalCathodeAnalytical Chemistry (journal)ChemistryPhysical chemistryThermodynamicsElectrodeMetallurgyPhysicsEndocrinologyMedicineOrganic chemistryCatalysisChromatographyBiochemistryAdvancements in Battery MaterialsAdvanced Battery Materials and TechnologiesAdvanced Battery Technologies Research