Battery utilizing printable lithium

1. A battery comprising:

a lithium metal anode;

a solid electrolyte;

a cathode; and

at least one interface layer between a surface of the cathode and a surface of the solid electrolyte, the interface layer formed of a printable lithium composition comprised of lithium metal powder, a polymer binder compatible with the lithium metal powder, a rheology modifier compatible with the lithium metal powder, and a solvent compatible with the lithium metal powder and with the polymer binder,

wherein the interface layer improves the uniformity of the surface of the solid electrolyte thereby optimizing contact between the surface of the cathode and the surface of the solid electrolyte for better battery performance.

2. The battery of claim 1 , wherein the lithium metal anode or cathode is formed from the printable lithium composition of the at least one interface layer.

3. The battery of claim 2 , wherein the printable lithium composition forming the at least one interface layer, lithium metal anode or cathode comprises between about 5% to about 50% by weight of the lithium metal powder, between about 0.1% to about 20% by weight of the polymer binder, between about 0.1% to about 30% by weight of the rheology modifier, and between about 50% to about 95% by weight of the solvent.

4. The battery of claim 3 , wherein the interface layer is applied to the lithium metal anode or cathode by deposition.

5. The battery of claim 1 , wherein the cathode is a composite cathode.

6. The battery of claim 5 , wherein the composite cathode comprises sulfur.

7. The battery of claim 1 , wherein the interface layer comprises a foil or film formed from the printable lithium composition of the at least one interface layer.