A Chinese research team has achieved a significant breakthrough in the research and development of cathode materials for sodium-ion batteries. By employing a synergistic modification strategy that combines "bond structure regulation" and "interface modification," the team has successfully facilitated rapid sodium-ion transport within sodium manganese vanadium phosphate (NMVP) cathode materials. This approach has also led to the demonstration of exceptional cycle stability. The related research findings have been published in Advanced Functional Materials.

Test results reveal that the modified NMVP@Al₂O₃ cathode material exhibits an impressive initial discharge capacity of up to 99.3 mAh g⁻¹ at a 0.1C rate. After undergoing 3,000 cycles at a high rate of 10C, the material maintains a capacity retention rate of 84.5%, significantly outperforming its unmodified counterparts. Furthermore, the volume change of the modified material during the charge-discharge process is a mere 3.66%, indicating high structural reversibility and stability.

This study not only lays a solid foundation for the practical application of NMVP cathodes but also provides valuable insights and references for the design of other polyanionic electrode materials. It holds great promise for advancing the development of sodium-ion batteries with high stability and long lifespan.