School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China.
Key Laboratory of Advanced Ceramics and Machining Technology Ministry of Education, Tianjin, 300072, P. R. China.
Small Methods. 2023 Feb;7(2):e2201152. doi: 10.1002/smtd.202201152. Epub 2022 Dec 23.
Exploring prospective rechargeable batteries with high energy densities is urgently needed on a worldwide scale to address the needs of the large-scale electric vehicle market. Conversion-type metal fluorides (MFs) are attractive cathodes for next-generation rechargeable batteries because of their high theoretical potential and capacities and provide new perspectives for developing novel battery systems that satisfy energy density requirements. However, some critical issues, such as high voltage hysteresis and poor cycling stability must be solved to further enhance MF cathode materials. In this review, the recent advances in mechanisms focused on FeF cathodes under lithiation/delithiation processes are discussed in detail. Then, the classifications and advantages of various synthesis methods to prepare MF-based materials are first minutely discussed. Moreover, the performance attenuation mechanisms of MFs and the effort in the development of mitigation strategies are comprehensively reviewed. Finally, prospects for the current obstacles and possible research directions, with the aim to provide some inspiration for the development of MF cathode-based batteries are presented.
探索具有高能量密度的前瞻性可充电电池在全球范围内都是迫切需要的，以满足大规模电动汽车市场的需求。转换型金属氟化物（MFs）因其高理论电势和容量而成为下一代可充电电池有吸引力的正极材料，为开发满足能量密度要求的新型电池系统提供了新的视角。然而，必须解决一些关键问题，如高压滞后和较差的循环稳定性，以进一步提高 MF 正极材料的性能。在这篇综述中，详细讨论了在锂化/脱锂过程中聚焦于 FeF 正极的机制的最新进展。然后，首先详细讨论了制备 MF 基材料的各种合成方法的分类和优点。此外，还全面综述了 MFs 的性能衰减机制以及开发缓解策略的努力。最后，提出了当前障碍和可能的研究方向的展望，旨在为 MF 正极电池的发展提供一些启示。
