Achieving a Deeply Desodiated Stabilized Cathode Material by the High Entropy Strategy for Sodium‐ion Batteries

• DOI: 10.1002/ange.202405620
• Publication Date: 2024-05-06T14:24:27Z
• Authors: Zhaoguo Liu; Rixin Liu; Sheng Xu; Jiaming Tian; Jingchang Li; Haoyu Li; Tao Yu; Shiyong Chu; Anita M. D'Angelo; Wei Kong Pang; Liang Zhang; Shaohua Guo; Haoshen Zhou
• Keywords: 01 natural sciences; 0104 chemical sciences

Abstract Manganese‐based layered oxides are currently of significant interest as cathode materials for sodium‐ion batteries due to their low toxicity and high specific capacity. However, the practical applications impeded by sluggish intrinsic Na + migration poor structure stability a result Jahn–Teller distortion complicated phase transition. In this study, high‐entropy strategy is proposed enhance high‐voltage capacity cycling stability. The designed P2‐Na 0.67 Mn 0.6 Cu 0.08 Ni 0.09 Fe 0.18 Ti 0.05 O 2 achieves deeply desodiation delivers charging 158.1 mAh g −1 corresponding 0.61 with initial Coulombic efficiency 98.2 %. charge compensation attributed cationic anionic redox reactions conjunctively. Moreover, crystal effectively stabilized, leading slight variation lattice parameters. This research carries implications expedited development low‐cost, high‐energy‐density batteries.