The stability of the LM/SE interface can be separated into two inter-linked properties: chemical and contact stability. Chemical stability may potentially be achieved in two ways. (i) In the simplest case, the SE is thermodynamically stable against LM and no interphase is formed. (ii) If the SE is thermodynamically instable against LM, chemical stability can be achieved if it decomposes into an electronically insulating and ion conducting interphase, self-limiting further decomposition and thus effectively serving as a passivation layer Such interphases, however, may lead to inhomogeneous Li plating which favors the growth of lithium dendrites and cell short-circuiting. Additionally, volume changes during decomposition may incite contact losses. It was previously believed that SEs could inhibit the growth of Li dendrites due to their high stiffness (large elastic moduli) compared to LM. This assumption has now been refuted theoretically and experimentally. Recently, the crucial role of microstructural aspects to inhibit Li dendrite growth has also been established. This convoluted interplay of mechanical and microstructural properties, dendritic growth, (electro)chemical and contact stability renders the designing of stable LM/SE interfaces a difficult task. Uncontrollable SE decomposition at the LM/SE interface poses an additional engineering challenge and motivates the investigation of SEs that are thermodynamically stable against LM as they may facilitate the LM/SE interface.