Lithium metal battery with hybrid electrolyte system

An electrolyte system for an electrochemical cell, the electrolyte system comprising:

• a first liquid electrolyte comprising a non-aqueous organic solvent and configured to interface with a positive electrode;
• a solid dendrite-blocking layer that is ionically conducting and electrically insulating and comprises a first component and a distinct second component, the dendrite-blocking layer having a shear modulus of greater than or equal to about 7.5 GPa at 23° C., the first component comprising a solid-state ceramic, glass, or glass-ceramic and the second component comprising a solid-state polymer, the solid-state polymer comprising polyethylene oxide;
• and
• an interface layer configured to interface with a negative electrode comprising lithium metal on a first side of the interface layer and the dendrite-blocking layer on a second opposite side of the interface layer, the interface layer comprising a second liquid electrolyte, a gel polymer electrolyte, or a solid-state electrolyte, wherein the dendrite-blocking layer is disposed between the first liquid electrolyte and the interface layer.