TY  - JOUR
AU  - Yang, Miaorui
AU  - Deng, Shengping
AU  - Cheng, Shuoshuo
AU  - Zhao, Jingwen
AU  - Li, Shiyu
AU  - Bai, Ying
PY  - 2025
TI  - Unlocking fast and reversible sodium intercalation in Na3MnTi(PO4)3 cathode toward high performance sodium-ion batteries
JO  - Nano Research
SN  - 1998-0124
SP  - 94907561
VL  - 18
IS  - 8
AB  - Na3MnTi(PO4)3 (NMTP) shows significant potential as a cathode for sodium-ion batteries (SIBs) owing to its multi-electron transfer capability and high theoretical capacity. Nevertheless, its practical application is significantly limited by sluggish ion diffusion and rapid capacity decay, which stem from structural evolution during the sodiation/desodiation process. Herein, an Fe-doping strategy is proposed to reinforce the structural framework and enhance the electrochemical performance of NMTP. Trace Fe doping is found to shorten the M–O (M = Ti and Mn) bond while extending the Na–O bond, effectively minimizing structural fluctuations in NMTP during charge/discharge cycles and enhancing sodium-ion diffusion kinetics. Consequently, the Na3Mn0.99Fe0.02Ti0.99(PO4)3 (NMTP-Fe0.02) cathode demonstrates exceptional rate capability and long-term stability, delivering a high reversible capacity of 153.2 mAh·g−1 at 0.1 C and retaining 99.3 mAh·g−1 after 800 cycles at 5 C, exhibiting a capacity preservation rate of 81.5%. Moreover, its outstanding performance in full-cell configurations highlights the significant potential of NMTP-Fe0.02 for practical applications.
UR  - https://doi.org/10.26599/NR.2025.94907561
DO  - 10.26599/NR.2025.94907561