US Patent 11145899 Lithium metal battery with solid polymer electrolyte

A battery comprising: an anode comprising a first electrochemically active material: a cathode comprising both a second electrochemically active material and a first electrolyte; and a second electrolyte interposed between the anode and the cathode; wherein at least one of the first electrolyte and second electrolyte comprises a solid polymer electrolyte; wherein the solid polymer electrolyte has a glassy state, and comprises both at least one cationic diffusing ion and at least one anionic diffusing ion; wherein at least one of the at least one cationic diffusing ions comprises lithium; wherein at least one of the at least cationic diffusing ion and the at least one of the anionic diffusing ion is mobile in the glassy state; and wherein the first electrochemically active material comprises a lithium metal.