Solid-state lithium (Li) metal batteries, employing solid electrolytes, with high energy density and enhanced safety are promising choices for next-generation electrochemical energy storage devices. However, the large interfacial resistances seriously hinder their commercialization. To construct a conformal interface with acceptable resistances, introducing small amounts of additional liquid electrolytes is one of the most convenient and effective solutions. This review summarizes the fundamental understandings on the interfacial behaviors between liquid electrolytes, electrodes and solid-state electrolytes. Afterwards, emerging strategies are discussed, involving interfacial wetting, in situ polymerization and interfacial reactions. Finally, current limitations and perspectives are presented for liquid phase therapy regarding the interfacial science and engineering.

采用固态电解质，高能量密度和增强安全性的固态锂（Li）金属电池是下一代电化学储能设备的有前途的选择。但是，较大的界面阻力严重阻碍了它们的商业化。为了构建具有可接受电阻的共形界面，引入少量额外的液体电解质是最方便，最有效的解决方案之一。这篇综述总结了对液体电解质，电极和固态电解质之间的界面行为的基本理解。之后，讨论了新兴的策略，包括界面润湿，原位聚合和界面反应。最后，