Layered transition metal oxides are commonly used as the cathode materials in sodium-ion batteries due to their low cost and easy manufacturing. However, the application is hindered by poor rate performance and complex phase transitions. To address these challenges, a new seven-component high-entropy layered oxide cathode material, O3-NaNi_0.25Fe_0.15Mn_0.3Ti_0.1Sn_0.05Co_0.05Li_0.1O₂ (HEO) has been developed. The entropy stabilization effect plays a crucial role in improving the performance of electrochemical systems and the stability of structures. The HEO exhibits a specific discharge capacity of 154.1 mA h g^–1 at 0.1 C and 94.5 mA h g^–1 at 7 C. In-situ and ex-situ XRD results demonstrate that the HEO effectively retards complex phase transitions. This work provides a high-entropy design for the storage materials with a high energy density. Meanwhile, it eliminates industry doubts about the performance of sodium ion layered oxide cathode materials.

中文翻译：

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利用简单技术构建高性能钠离子层状氧化物阴极的高熵配置策略


层状过渡金属氧化物由于其成本低且易于制造而通常用作钠离子电池的正极材料。然而，其应用受到较差的倍率性能和复杂的相变的阻碍。为了应对这些挑战，一种新型七组分高熵层状氧化物正极材料O3-NaNi _0.25 Fe _0.15 Mn _0.3 Ti _0.1 Co _0.05 Li _0.1 O ₂ (HEO) 已开发出来。熵稳定效应对于提高电化学系统的性能和结构的稳定性起着至关重要的作用。 HEO 在 0.1 C 下的放电比容量为 154.1 mAh g ^–1 ，在 7 C 下的放电比容量为 94.5 mAh g ^–1 。原位和异位 XRD 结果表明，HEO 有效地延迟复杂的相变。这项工作为具有高能量密度的存储材料提供了高熵设计。同时，也消除了业界对钠离子层状氧化物正极材料性能的疑虑。