NOVELTY - The electrochemical cell (100) has a negative electrode (102) that includes a form of lithium, and a positive electrode (104) spaced apart from the negative electrode. A porous separator (106) is positioned between the negative electrode and positive electrode. A first lithium ion conducting and ionically insulating composite solid electrolyte layer (107) is positioned between the negative electrode and positive electrode. A second lithium ion conducting and ionically insulating composite solid electrolyte layer is positioned between the positive electrode and separator.    USE - Electrochemical cell used as lithium battery with composite solid electrolyte. Can be used in energy storage systems for portable electronics, and electric and hybrid-electric vehicles.    ADVANTAGE - Includes a composite solid electrolyte layer capable of conducting lithium ions between the anode and cathode while blocking electrodes and any liquid electrolyte contained in the positive electrode. Uses the composite solid electrolyte layer to mechanically suppress roughening of the lithium, thus preventing initiation and propagation of lithium dendrites from the negative electrode toward the positive electrode. Includes an additional layer of fully dense lithium-conducting ceramic or glass situated between the layer of ceramic-embedded polymer and positive electrode for preventing or inhibiting swelling of the polymer layer with liquid electrolyte. Provides an electrochemical cell that can operate at lower temperatures, and avoids aging mechanism such as lithium dendrites, lithium morphology change, internal shorts, and liquid electrolyte decomposition. Ensures favorable mechanical properties and low contact resistance between the lithium metal and solid electrolytes, while achieving high specific energy and specific power.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for the electrochemical cell manufacture method.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view of a lithium-oxygen cell with two electrodes and a reservoir configured to exchange oxygen with a positive electrode for a reversible reaction with lithium containing a solid electrolyte composite.    Electrochemical cell (100)    Negative electrode (102)    Positive electrode (104)    Separator (106)    First lithium ion conducting and ionically insulating composite solid electrolyte layer (107)