Sodium layered oxide materials have shown excellent performance as cathodes in sodium ion batteries, due to their flexibility, versatility, and intrinsically fast Na ion structural diffusion which leads to enhanced rate capability. In this work, we have examined two strategies to mitigate Jahn-Teller distortion and boost the performance of these systems: substituting with electrochemically active (e.g. Fe) and doping with electrochemically inactive materials (e.g. Zn). Here, Mn-rich P2- phase Na_2/3Mn_0.8M_0.1M′_0.1O₂ (M, M’ = Fe³⁺, Al³⁺, Zn²⁺, Cu²⁺, Ti⁴⁺) materials are synthesized from earth abundant precursors, via solid state-reaction, and characterized by X-ray diffraction, scanning electron microscopy and solid state NMR. The materials demonstrated a superior combination of capacity retention (74–94%) and specific charge at C/10 (∼130–159 mAh g⁻¹) and 1C (∼87–101 mAh g⁻¹) in the studied voltage window (2–4 V vs. Na⁺/Na). Thus, this work represents not only a new family of high-performance materials, but also validation for the rational design approaches used herein.

钠层氧化物材料因其柔韧性，多功能性和本质上快速的Na离子结构扩散而显示出优异的性能，可作为钠离子电池中的阴极，从而提高了倍率能力。在这项工作中，我们研究了两种减轻Jahn-Teller畸变并提高这些系统性能的策略：用电化学活性材料（例如Fe）代替和用电化学惰性材料（例如Zn）掺杂。这里，Mn富集P2-相的Na _2/3的Mn _0.8中号_0.1 M' _0.1 ø ₂（M，M” =铁³⁺，铝³⁺，锌²⁺，铜²⁺，钛⁴⁺）材料是通过固相反应从富含地球的前体合成的，并通过X射线衍射，扫描电子显微镜和固态NMR进行表征。在研究的电压窗口中，这些材料在C / 10（〜130–159 mAh g ^-1）和1C（〜87–101 mAh g ^-1）下表现出了容量保持率（74–94％）和比电荷的出色组合（ 2–4 V对Na ⁺ / Na）。因此，这项工作不仅代表了高性能材料的新家族，还代表了对本文使用的合理设计方法的验证。