中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 35 No. 12 December 2025 |
（1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;
2. Advanced Battery Materials Engineering Research Center of the Ministry of Education, Central South University, Changsha 410083, China;
3. National Engineering Research Center of Low-carbon Nonferrous Metallurgy, Central South University, Changsha 410083, China）
Abstract:To investigate the mechanism by which ZrO2 modification affects the electrochemical performance of the NaNi1/3Fe1/3Mn1/3O2 (NFM) cathode material for sodium-ion batteries, ZrO2-coated NFM (ZrO2@NFM) was prepared via high-temperature calcination. XRD refinement results revealed that ZrO2 modification increased the Na-layer spacing in the NFM material. XPS analysis results demonstrated that ZrO2 modification adjusted the Mn3+/Mn4+ ratio in NFM by reducing the Mn3+ content. Electrochemical test results revealed that, compared to NFM, ZrO2@NFM exhibited superior rate capability and cycling stability. It also exhibited significantly enhanced Na+ diffusion coefficients and reduced interfacial charge transfer resistance. The ZrO2 coating increased Na-layer spacing, reduced electrochemical polarization, and inhibited side reactions. In summary, the synergistic effect of component regulation and surface engineering through ZrO2 coating improved Na+ diffusion kinetics and enhanced cycling stability.
Key words: sodium-ion battery; ZrO2 coating; layered oxide cathodes; diffusion coefficient; electrochemical performance
