Through these ASSLIB studies, unique phenomena arising from the solidifica-on of LIBs have been reported. Both theore-cal and experimental studies reported that the space charge layers, which cause the local inhomogeneous distribu-on of ions and electrons, forms at the interfaces between the solid ba5ery components . Such an imbalance in charge carrier concentra-ons at the interface can lead to increased interfacial resistance, poten-ally degrading ba5ery performance . Furthermore, in ASSLIBs, the strain induced in electrode materials by lithia-on/delithia-on, i.e., the chemo-mechanical strain , is rigidly constrained at the solid-solid interfaces, resul-ng in significant stress in the ba5ery components . Such large stress not only causes mechanical degrada-on in ASSLIBs , but also has been reported to greatly influence various proper-es of ba5ery components, including electrical conduc-vity , electrode poten-al , reac-on mechanisms , and phase equilibria . As described above, ba5ery components in ASSLIBs are subjected to environments that differ from those in liquid-based LIBs; consequently, their material proper-es may deviate from those in their liquid-based counterparts.