Interfacial engineering for stable lithium metal anodes
A battery includes 1) an anode, 2) a cathode, and 3) an electrolyte disposed between the anode and the cathode. The anode includes a current collector and an interfacial layer disposed over the current collector, and the interfacial layer includes an array of interconnected, protruding regions that define spaces.
1. A battery comprising:
an anode;
a cathode; and
an electrolyte disposed between the anode and the cathode,
wherein the anode includes a current collector and an interfacial layer disposed over the current collector, and the interfacial layer includes an array of interconnected, protruding regions that define spaces,
wherein the interfacial layer is formed of at least one material selected from amorphous carbon, metal carbides, non-metal carbides, metal nitrides, non-metal nitrides, metal silicides, non-metal silicides, and metal alloys, and the interfacial layer is devoid of graphene.
2. The battery of claim 1 , further comprising an anode material, and the spaces defined by the protruding regions accommodate the anode material.
3. The battery of claim 2 , wherein the interfacial layer is configured as a barrier to separate the anode material from the electrolyte.
4. The battery of claim 2 , wherein the anode material is lithium metal.
5. The battery of claim 1 , wherein at least one of the protruding regions has an aspect ratio greater than 3.
6. The battery of claim 1 , wherein at least one of the protruding regions includes a wall having a thickness in the range of 0.5 nm to 100 nm.
7. The battery of claim 1 , wherein the interfacial layer is formed of at least one material having a Young's modulus of at least 50 GPa.
8. The battery of claim 1 , further comprising seeds disposed within the spaces, and the seeds are configured to promote deposition of an anode material.
9. A battery comprising:
an anode;
a cathode; and
an electrolyte disposed between the anode and the cathode,
wherein the anode includes a current collector and an interfacial layer disposed over the current collector, and the interfacial layer includes an array of encapsulating structures that define interior spaces,
further comprising seeds disposed within the interior spaces, the seeds are configured to promote deposition of an anode material, and the seeds are formed of a material different from lithium metal.
10. The battery of claim 9 , further comprising the anode material, and the encapsulating structures accommodate the anode material within the interior spaces.
11. The battery of claim 10 , wherein the anode material is lithium metal.
12. The battery of claim 9 , wherein at least one of the encapsulating structures includes a wall having a thickness in the range of 0.5 nm to 100 nm.
13. The battery of claim 9 , wherein the interfacial layer is formed of at least one material selected from carbon, layered materials, metal carbides, non-metal carbides, metal nitrides, non-metal nitrides, metal silicides, non-metal silicides, and metal alloys.
14. The battery of claim 9 , wherein the interfacial layer is formed of at least one material having a Young's modulus of at least 50 GPa.
15. The battery of claim 9 , wherein the seeds are formed of silicon, germanium, tin, or gold.
16. A battery electrode comprising:
a current collector;
an interfacial layer disposed over the current collector; and
an electrode material disposed between the current collector and the interfacial layer,
wherein the interfacial layer includes a layered material,
wherein the electrode material is lithium metal,
wherein the interfacial layer is configured to move relative to the current collector to accommodate volumetric expansion of the electrode material.
17. The battery electrode of claim 16 , wherein the layered material is selected from boron nitride, graphene, layered metal oxides, and layered metal chalcogenides.
18. The battery electrode of claim 16 , wherein the interfacial layer has a thickness of 1 to 50 layers of the layered material.