Alloy formation method for a solid-state battery and the solid-state battery thereof

An alloy formation method for a solid-state battery comprising steps of:

• providing a solid-state battery that comprises at least an anode and a cathode, and a doped sulfide solid electrolyte is contained between the anode and the cathode;
• and the doped sulfide solid electrolyte comprises an anode-philic material (M) doped in a sulfide solid electrolyte in which the content of doping is based on phosphorus (P) in the sulfide solid electrolyte, to form the doped sulfide solid electrolyte with a ratio of MxP1-x, where x is 0.001~0.999;
• and the anode comprises an anode metal including Lithium, Sodium, Zinc, Aluminum, Indium, Copper or combination thereof;
• conducting at least one charge/discharge cycle of the solid-state battery;
• and
• forming an alloy at an interface between the anode and the doped sulfide solid electrolyte by the anode-philic material and the anode metal of the anode.