ANODE SUPPORTED SOLID-STATE ELECTROLYTE SEPARATORS

An anode electrode for a battery cell, a battery cell, and a method of forming an anode supported electrolyte separator. The anode electrode includes an anode current collector including a first surface and an anode supported electrolyte separator disposed on the first surface. The anode supported electrolyte separator includes at least one electrolyte selected from the following compositions: a) yLiS·(100-y-x)PS·xPOwherein y is in the range of 70 mole percent to 80 mole percent and x is in the range of 1 mole percent to 10 mole percent, b) LiMPSwherein M is at least one of Si, Ge, and Sn, and c) argyrodite. In addition, the anode supported electrolyte separator exhibits a thickness in the range of 1 micrometers to 100 micrometers.