Fluorinated Rocksalt‐Polyanion Cathode for Lithium‐Ion Batteries

作者：Yimeng Huang, Yaoshen Niu, Zhen Zhang, Zihan Lin, Weiyin Chen, V. Liu, Iradwikanari Waluyo, Adrian P. Hunt, Xianghui Xiao, Yanhao Dong, Ju Li · 发表于：Interdisciplinary materials · 年份：2025 · DOI：10.1002/idm2.70015 · 被引用次数：3 · 研究领域：Advancements in Battery Materials、Advanced Battery Materials and Technologies、Extraction and Separation Processes

ABSTRACT Integrated rocksalt‐polyanion cathodes (DRXPS) are promising candidates for next‐generation lithium‐ion battery cathode materials that combine high energy density, stable cycling performance, and reduced reliance on Co and Ni. In this work, we investigated Li 3 Mn 1.6 P 0.4 O 5.4 F 0.6 , a new DRXPS cathode with fluoride incorporation. A pure spinel phase was formed and a discharge capacity retention of 84% was achieved after 200 cycles between 1.5 and 4.8 V versus Li/Li + . In comparison, the similarly synthesized Li 3 Mn 1.6 Nb 0.4 O 5.4 F 0.6 , in which all P 5+ was substituted by Nb 5+ while maintaining the same stoichiometry for all other elements, crystallized in a disordered rocksalt structure, and exhibited inferior capacity retention and rate capability than the P 5+ counterpart. Our findings expand the compositional space of DRXPS to include F − , justify the viability of integrating polyanion groups in rocksalt‐type cathodes, and highlight the superiority of P 5+ as a cation charge compensator compared to the commonly used Nb 5+ . This work thereby advances the design of robust, high‐performance cathode materials for sustainable batteries.