biostudies-literatureLiu YHaiyan Wang1575https://www.ebi.ac.uk/biostudies/studies/S-EPMC12566254biostudies-literatureUnknown15(20)O3-type NaNi_1/3Mn_1/3Fe_1/3O₂ (NFM) cathodes for sodium-ion batteries face critical challenges of sluggish Na⁺ diffusion and structural degradation during cycling. In this study, we implement an Sb³⁺ doping strategy that enhances structural stability and interfacial stability by modulating the NFM grain morphology to promote densification of primary particles and shorten Na⁺ migration paths. The optimized Sb-doped NFM1Sb (1%mol Sb) cathode exhibits excellent electrochemical performance, achieving 86.48% capacity retention after 200 cycles at 1 C and a high rate capability of 122.2 mAh g^-1 at 5 C. These improvements are attributed to the alleviation of stress concentration and suppression of microcrack forNanomaterials (Basel, Switzerland)Enhancing Structural and Interfacial Stability of NaNi<sub>1/3</sub>Mn<sub>1/3</sub>Fe<sub>1/3</sub>O<sub>2</sub> Cathodes via Sb<sup>3+</sup> Doping for Sodium Ion Batteries.PMC12566254No. 222722052023RC30582025RC9018No. 22378109No. 2023JJ20059Liu YLi HSun DZhang MWang HTang YShi YfalseEnhancing Structural and Interfacial Stability of NaNi<sub>1/3</sub>Mn<sub>1/3</sub>Fe<sub>1/3</sub>O<sub>2</sub> Cathodes via Sb<sup>3+</sup> Doping for Sodium Ion Batteries.O3-type NaNi_1/3Mn_1/3Fe_1/3O₂ (NFM) cathodes for sodium-ion batteries face critical challenges of sluggish Na⁺ diffusion and structural degradation during cycling. In this study, we implement an Sb³⁺ doping strategy that enhances structural stability and interfacial stability by modulating the NFM grain morphology to promote densification of primary particles and shorten Na⁺ migration paths. The optimized Sb-doped NFM1Sb (1%mol Sb) cathode exhibits excellent electrochemical performance, achieving 86.48% capacity retention after 200 cycles at 1 C and a high rate capability of 122.2 mAh g^-1 at 5 C. These improvements are attributed to the alleviation of stress concentration and suppression of microcrack for2025-01-01T00:00:00Z2025 Oct2026-05-14T03:19:25.083Z2026-05-14T03:12:28.18ZS-EPMC125662544114954410.3390/nano15201575