In this work we introduce an approach to fabricate a solid composite electrolyte film that is thin, ionically conductive, and mechanically robust with good potential for manufacturability, for the application of lithium metal batteries. First a doped lithium aluminum titanium phosphate ceramic thin film with thickness of ∼25 μm is formed by aqueous spray coating, a scalable process. The film is partially sintered to form a three-dimensionally interconnected structure with a dense backbone. It is then backfilled with a crosslinkable poly(ethylene oxide) (PEO)-based polymer electrolyte. The composite has very high ceramic loading of 77 wt% (61 vol%) and an ionic conductivity of 3.5x10^-5 S/cm at 20°C with an activation energy of 0.43 eV. The main ion transport pathway is through the ceramic network, predicted by modelling and verified by experiments. Owing to the interconnected structure of the ceramic, the composite electrolyte exhibits much improved mechanical strength.

在这项工作中，我们介绍了一种制造固体复合电解质膜的方法，该膜薄，离子导电并且机械坚固，具有良好的可制造性，可用于锂金属电池。首先，通过可水洗的喷涂工艺形成厚度约为25μm的掺杂锂铝钛磷酸盐陶瓷薄膜。该膜被部分烧结以形成具有致密骨架的三维互连结构。然后用可交联的聚环氧乙烷（PEO）基聚合物电解质回填。该复合材料的陶瓷负载量非常高，为77 wt％（61 vol％），离子电导率为3.5x10 ^-520°C时的S / cm，活化能为0.43 eV。离子的主要传输途径是通过陶瓷网络，通过建模进行预测并通过实验进行验证。由于陶瓷的互连结构，复合电解质显示出大大提高的机械强度。