Room-temperature sodium-ion batteries offer an alternative solution for large-scale energy storage system because of the huge abundant, and low cost of sodium resources. An O3-type sodium-excess layered material Na_1.2Ni_0.2Mn_0.2Ru_0.4O₂ (0.4Na₂RuO₃·0.4NaNi_0.5Mn_0.5O₂) is prepared as a cathode material for sodium-ion batteries, which reveals an enhanced cycling stability, high coulombic efficiency, and superior dynamics properties. In-situ X-ray diffraction analysis is conducted to get insight into the sodium storage mechanism.

中文翻译：

---

Na _1.2 Ni _0.2 Mn _0.2 Ru _0.4 O ₂作为钠离子电池正极材料的电化学和原位X射线衍射研究

室温钠离子电池由于钠资源的丰富和低成本而为大规模储能系统提供了替代解决方案。作为钠离子电池用正极材料，准备了O ₃型钠过量层状材料Na _1.2 Ni _0.2 Mn _0.2 Ru _0.4 O ₂（0.4Na ₂ RuO ₃ ·0.4NaNi _0.5 Mn _0.5 O ₂）。循环稳定性，高库仑效率和出色的动力学性能。进行了原位X射线衍射分析，以了解钠的储存机理。