Lithium cell having a glassy carbon layer

1. A separator for a lithium secondary cell, comprising:

a separator substrate selected from porous separators for liquid electrolyte cells and solid-state electrolyte separators having lithium-ion conductivity; and

a layer of glassy carbon (GC) coating applied atop at least on one side of the separator substrate, wherein the glass carbon layer has a thickness of 1 μm or less.

2. The separator according to claim 1 , wherein the separator substrate is a porous separator for liquid electrolyte cells selected from film separators and nonwoven fabric separators optionally having a coating comprising ceramic particles, ceramic separators and multilayer combinations thereof.

3. The separator according to claim 1 , wherein the separator substrate is a solid-state electrolyte separator, wherein the solid-state electrolyte is selected from ceramic lithium-ion conductors, glassy lithium-ion conductors, polymer electrolytes and combinations thereof.

4. A positive electrode having an integrated separator layer for a lithium all-solid-state cell, comprising:

a positive electrode layer comprising at least one cathode active material, at least one solid-state electrolyte having lithium-ion conductivity and optionally at least one electrically conductive additive and/or at least one binder;

a separator layer applied atop the positive electrode layer and comprising at least one solid-state electrolyte having lithium-ion conductivity and optionally at least one binder; and

a layer of glassy carbon coating applied atop the separator layer, wherein the glass carbon layer has a thickness of 1 μm or less.

5. A negative electrode having an integrated glassy carbon layer for a lithium all-solid-state cell, comprising:

a negative electrode layer comprising at least one anode active material, at least one solid-state electrolyte having lithium-ion conductivity and optionally at least one electrically conductive additive and/or at least one binder;

a layer of glassy carbon coating applied atop the negative electrode layer, wherein the glass carbon layer has a thickness of 1 μm or less; and

optionally a separator layer applied atop the glassy carbon layer and comprising at least one solid-state electrolyte having lithium-ion conductivity and optionally at least one binder.

6. A lithium secondary cell, comprising a negative electrode, a positive electrode and therebetween a separator according to claim 1 , wherein the glassy carbon layer of the separator faces the negative electrode.

7. A lithium secondary cell, comprising a negative electrode, a positive electrode and therebetween a separator according to claim 2 , wherein the glassy carbon layer of the separator faces the negative electrode.

8. A lithium secondary cell, comprising a negative electrode, a positive electrode and therebetween a separator according to claim 3 , wherein the glassy carbon layer of the separator faces the negative electrode.

9. The lithium secondary cell according to claim 6 , selected from a lithium-ion cell comprising a liquid electrolyte, an all-solid-state lithium-ion cell, a lithium-sulfur cell and a lithium-air cell.

10. The lithium secondary cell according to claim 6 , wherein the negative electrode contains metallic lithium or a lithium alloy as the active material.

11. The lithium secondary cell according to claim 9 , wherein the negative electrode contains metallic lithium or a lithium alloy as the active material.

12. A lithium all-solid-state secondary cell comprising an electrode according to claim 4 .

13. A lithium all-solid-state secondary cell comprising an electrode according to claim 5 .