Despite the high energy density of lithium metal batteries (LMBs), their application in rechargeable batteries is still hampered due to insufficient safety. Here, we present a novel flame-retardant solid-state electrolyte based on polyvinylidene fluoridehexafluoropropylene (PVDF-HFP) with nano SiO₂ aerogel as an inert filler but Li_6.4La₃Zr_1.4Ta_0.6O₁₂ (LLZTO) as an auxiliary component to enhance the ion conductivity. The introduction of SiO₂ aerogels imparts the polymer electrolyte with exceptional thermal stability and flame retardancy. Simultaneously, the interaction between hydroxyl groups of SiO₂ particles and PVDF-HFP creates a strong cross-linking structure, enhancing the mechanical strength and stability of the electrolyte. Furthermore, the presence of SiO₂ aerogel and LLZTO facilitates the dissociation of lithium salts through Lewis acid-base interactions, resulting in a high ionic conductivity of 1.01 × 10⁻³ S·cm⁻¹ and a wide electrochemical window of ∼ 5.0 V at room temperature for the prepared electrolytes. Remarkably, the assembled Li|Li cell demonstrates the excellent resistance to lithium dendrite and runs stablly for over 1500 h at a current density of 0.25 mA·cm⁻². Thus, we prepare a pouch cell with high safety, which can work normally after short-circuiting under the external folding and cutting.

尽管锂金属电池（LMB）能量密度高，但由于安全性不足，其在可充电电池中的应用仍然受到阻碍。_{在此，我们提出了一种基于聚偏二氟乙烯六氟丙烯（PVDF-HFP）、纳米SiO 2}气凝胶作为惰性填料、Li _6.4 La ₃ Zr _1.4 Ta _0.6 O ₁₂ （LLZTO）作为辅助成分的新型阻燃固态电解质。增强离子电导率。_{SiO 2}气凝胶的引入赋予聚合物电解质优异的热稳定性和阻燃性。_{同时，SiO 2}颗粒的羟基与PVDF-HFP之间的相互作用产生强交联结构，增强了电解质的机械强度和稳定性。_{此外，SiO 2}气凝胶和LLZTO的存在通过路易斯酸碱相互作用促进锂盐的解离，从而导致1.01 × 10 ^{− 3} S·cm ^{− 1}的高离子电导率和〜5.0 V的宽电化学窗口制备好的电解质在室温下进行。值得注意的是，组装的Li|Li电池表现出优异的抗锂枝晶性能，并在0.25 mA·cm ^-2的电流密度下稳定运行1500小时以上。由此，我们制备了一种安全性高的软包电池，在外部折叠和切割下发生短路后仍能正常工作。