In-situ constructed SnO2 gradient buffer layer as a tight and robust interphase toward Li metal anodes in LATP solid state batteries

An in-situ approach was proposed to constructing a tight and robust interface between the Li anode and LAPT electrolyte via a SnO2 gradient buffer layer, which not only can effectively alleviate the physical contact loosening, it also, more importantly, protects the LATP electrolyte surface from erosion by the Li metal anode, and consequently regulates uniform lithium deposition.