O'3-NaMnO₂ possesses a high theoretical capacity due to its high initial sodium content as a cathode material in Na-ion batteries. However, complex phase transition from O'3 to P3, even to O1 phase caused by the gliding of layered structure occurred during Na extraction, leads to the collapse of the layered structure, and causes loss of battery capacity. To improve the structural stability of layered O'3-NaMnO₂ cathode, the electrochemically inert B³⁺ with good affinity for oxygen was selected to substitute the Mn³⁺ in O'3-NaMnO₂ and a series of O'3-NaB_xMn_1-xO₂ (x=0, 0.05, 0.1, 0.15, 0.25) oxides were obtained by optimized preparation methods. The average effective radius of the transition-metal layer is reduced after B doping, making the structure more stable. At the same time, B inhibits the Jahn-Teller distortion caused by Mn³⁺. Among them, NaB_0.1Mn_0.9O₂ shows improved cycle and rate performance. In-situ XRD and EIS results reveal that the enhanced electrochemical performance is resulted from the higher structure reversibility than O'3-NaMnO₂.

O'3 -NaMnO ₂作为钠离子电池的正极材料，具有较高的初始钠含量，因此具有较高的理论容量。然而，在脱钠过程中，由于层状结构的滑移而发生从O'3到P3的复杂相变，甚至到O1相，导致层状结构的坍塌，导致电池容量的损失。为了提高层状O'3 -NaMnO ₂正极的结构稳定性，选择对氧具有良好亲和力的电化学惰性B ^3+替代O'3 -NaMnO ₂和一系列O'3中的Mn ³⁺通过优化制备方法得到-NaB _x Mn _{1- x} O ₂ ( x =0, 0.05, 0.1, 0.15, 0.25)氧化物。B掺杂后过渡金属层的平均有效半径减小，结构更加稳定。同时，B抑制了由Mn ³⁺引起的Jahn-Teller畸变。其中，NaB _0.1 Mn _0.9 O ₂表现出改善的循环和倍率性能。原位XRD和EIS结果表明，增强的电化学性能是由于比O'3 -NaMnO ₂具有更高的结构可逆性。