Metal fluoride cathodes are promising candidates for next-generation rechargeable lithium metal batteries (LMBs). However, the sluggish reaction kinetics limits their electrochemical applications, especially at high mass loadings. Moreover, current designs on fluoride cathodes hardly achieve the related practical pouch cells and full cells. A honeycombed FeF₃@C nanocomposite with high specific surface area (SSA) of 191.6 m² g⁻¹, is successfully synthesized herein, where the nanosized FeF₃ particles (less than 40 nm) are uniformly embedded in the honeycombed carbon matrix. Benefiting from the unique configuration, it can provide an efficient mixed Li⁺/e⁻ conduction networks then enable excellent lithium storage performance under three-electron transfer reaction even at high mass loadings. The high-loading honeycombed FeF₃@C (∼3.5 mg cm⁻²) cathode offers a reversible specific capacity of 369.9 mAh g⁻¹ after 500 cycles in a Li half-cell, corresponding to noticeable areal capacity of ∼1.25 mAh cm⁻². In order to further investigate their practical applications, as-produced FeF₃@C−Li pouch cell is constructed, delivering average nominal capacity of ∼50 mAh per cycle. Furthermore, the FeF₃−prelithiated Si (PLSi) full cell is produced for the first time, demonstrating cycle life over 200 cycles and rate capability up to 5C. Notably, the as-produced cathodes show partially reversible phase transition during discharge/charge, which offers abundant fresh phase interface, contributing to growing pseudocapacitance and Li⁺ migration ability as the cycle proceeds. The pseudocapacitance compensates for lost capacity caused by incompletely reversible phase transition, and enables superior electrochemical properties.

金属氟化物阴极是下一代可充电锂金属电池 (LMB) 的有前途的候选材料。然而，缓慢的反应动力学限制了它们的电化学应用，尤其是在高质量负载下。此外，目前氟化物阴极的设计很难实现相关的实用软包电池和全电池。^{本文成功合成了具有 191.6 m 2} g ^-1高比表面积 (SSA) 的蜂窝状 FeF ₃ @C 纳米复合材料，其中纳米级 FeF ₃颗粒（小于 40 nm）均匀嵌入蜂窝状碳基体中。得益于独特的配置，它可以提供高效的混合 Li ⁺ /e ⁻即使在高质量负载下，传导网络也能在三电子转移反应下实现出色的锂存储性能。高负载量的蜂窝状 FeF ₃ @C (~3.5 mg cm ^-2 ) 正极在锂半电池中循环 500 次后可提供 369.9 mAh g ^-1的可逆比容量，对应于~1.25 mAh cm - 的显着面积容量^{。 2} . 为了进一步研究它们的实际应用，构建了原样生产的 FeF _{3 @C−Li 软包电池，每个循环的平均标称容量为 ∼50 mAh。}此外，FeF ₃−首次生产预锂化硅 (PLSi) 全电池，展示了超过 200 个循环的循环寿命和高达 5C 的倍率能力。值得注意的是，所生产的正极在放电/充电期间显示出部分可逆的相变，这提供了丰富的新鲜相界面，有助于随着循环的进行增加赝电容和 Li ^{+迁移能力。}赝电容补偿了由不完全可逆相变引起的容量损失，并实现了优异的电化学性能。