Ion transport efficiency, the key to determining the cycling stability and rate capability of all-solid-state lithium metal batteries (ASSLMBs), is constrained by ionic conductivity and Li⁺-migration ability across the multicomponent phases and interfaces in ASSLMBs. Here, we report a robust strategy for the large-scale fabrication of a practical solid electrolyte composite with high-throughput linear Li⁺-transport channels by compositing an all-trans block copolymer PVDF-b-PTFE matrix with ferroelectric BaTiO₃–TiO₂ nanofiber films. The electrolyte shows a sustainable electromechanical-coupled deformability that enables the rapid dissociation of anions with Li⁺ to create more movable Li⁺ ions and spontaneously transform the battery internal strain into Li⁺-ion migration kinetic energy. The ceramic framework homogenizes the interfacial potential with electrodes, endowing the electrolyte with a high conductivity of 0.782 mS·cm^–1 and stable ion transport ability in ASSLMBs at room temperature. The batteries of LiFePO₄/Li can stably cycle 1000 times at 0.5 C with a high capacity retention of 96.1%, and Ah-grade pouch or high-voltage Li(Ni_0.8Mn_0.1Co_0.1)O₂/Li batteries also exhibit excellent rate capability and cycling performance.

中文翻译：

---

为全固态锂金属电池定制包含铁电陶瓷纳米纤维和全反式嵌段共聚物的实用固体电解质复合材料


离子传输效率是决定全固态锂金属电池 (ASSLMB) 循环稳定性和倍率性能的关键，受到离子电导率和 Li ⁺ 跨多组分相和界面的迁移能力的限制在 ASSLMB 中。在这里，我们报告了一种稳健的策略，通过将全反式嵌段共聚物 PVDF-b-PTFE 基体与铁电 BaTiO ₃ –TiO ₂ 纳米纤维薄膜。该电解质表现出可持续的机电耦合变形能力，能够使阴离子与Li ⁺ 快速解离，产生更多可移动的Li ⁺ 离子，并自发地将电池内部应变转化为Li ⁺ -离子迁移动能。陶瓷骨架均匀化了与电极的界面电位，赋予电解质在室温下ASSLMBs中具有0.782 mS·cm ^–1 的高电导率和稳定的离子传输能力。 LiFePO ₄ /Li电池可在0.5 C下稳定循环1000次，容量保持率高达96.1%，Ah级软包或高压Li(Ni _0.8 Mn _0.1 Co _0.1 )O ₂ /Li电池还表现出优异的倍率性能和循环性能。