Na-ion batteries demonstrate significant potential for power-oriented applications, including starter power sources and frequency regulation in energy storage systems. However, their advancement critically relies on the development of cathode materials that simultaneously deliver high-rate capability and long-term cycling stability. Although the conventional P2-Na_0.67Ni_0.33Mn_0.67O₂ cathode exhibits high energy density, its structural degradation at elevated voltages compromises long-term reliability in high-power applications.
To address this challenge, this work propose a multi-element doping strategy, designing a P2-Na_0.67Zn_0.05Ni_0.23Fe_0.1Mn_0.57Ti₀.₀₅O₂ cathode material. This novel composition effectively suppresses high-voltage phase transitions, thereby enhancing structural stability. Electrochemical performance tests reveal that the optimized cathode retains >85% capacity retention after 300 cycles at a high rate of 3C, demonstrating exceptional rate capability and cycling durability. This work provides a rational design strategy for developing high-performance cathode materials in power-type Na-ion batteries. The work titled “High-Rate and Long-Cycling P2-Type Cathode Material for Na-Ion Batteries”, was published on Acta Physico-Chimica Sinica (published on Nov. 1, 2025).
DOI: 10.1016/j.actphy.2025.100214