Enhancing Structural and Interfacial Stability of NaNi1/3Mn1/3Fe1/3O2 Cathodes via Sb3+ Doping for Sodium Ion Batteries
Year: 2025
Type: article
Abstract: O3-type NaNi1/3Mn1/3Fe1/3O2 (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 formation during cycling. This work demonstrates the critical role of grain morphology regulation through heavy-metal doping in developing long-life and high-rate SIBs, providing a viable pathway toward next-generation energy storage systems.
Source: Nanomaterials
DOI: 10.3390/nano15201575
Authors: Yong Liu, You Shi, Mengjie Zhang, Dan Sun, Huanhuan Li, Haiyan Wang, Yougen Tang
Institutions: Central South University, Henan Normal University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,896
Awards: G3056340429, G7922815139
OpenAlex ID: W4415246909