Thin film encapsulation for thin film batteries and other devices
View Patent ↗An electrochemical device is claimed and disclosed, including a method of manufacturing the same, comprising an environmentally sensitive material, such as, for example, a lithium anode; and a plurality of alternating thin metallic and ceramic, blocking sub-layers. The multiple metallic and ceramic, blocking sub-layers encapsulate the environmentally sensitive material. The device may include a stress modulating layer, such as for example, a Lipon layer between the environmentally sensitive material and the encapsulation layer.
1. An electrochemical device comprising:
a LiCoO 2 layer;
a first Lipon layer deposited on said LiCoO 2 layer;
a lithium layer deposited on said first Lipon layer;
a second Lipon layer deposited on said lithium layer; and
an encapsulation layer, comprising a plurality of alternating metallic and ceramic sub-layers, deposited on said second Lipon layer, at least one area of said encapsulation layer corresponding to an anode is selectively conductive and another area is insulating.
2. The electrochemical device of claim 1 , wherein said metallic sub-layers comprise at least one element selected from the group comprising:
scandium, yttrium, lanthanum, titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, iron, cobalt, nickel, copper, zinc, boron, aluminum, carbon, silicon, germanium, beryllium, magnesium, calcium, strontium, barium, lithium, sodium, potassium, rubidium, and caesium.
3. The electrochemical device of claim 1 , wherein said ceramic sub-layers comprise nitrides of at least one element selected from the group comprising:
scandium, yttrium, lanthanum, titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, iron, cobalt, nickel, copper, zinc, boron, aluminum, carbon, silicon, germanium, beryllium, magnesium, calcium, strontium, barium, lithium, sodium, potassium, rubidium, and caesium.
4. The electrochemical device of claim 1 , wherein said ceramic sub-layers comprise oxides of at least one element selected from the group comprising:
scandium, yttrium, lanthanum, titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, iron, cobalt, nickel, copper, zinc, boron, aluminum, carbon, silicon, germanium, beryllium, magnesium, calcium, strontium, barium, lithium, sodium, potassium, rubidium, and caesium.
5. The electrochemical device of claim 1 , wherein said ceramic sub-layers comprise carbides of at least one element selected from the group comprising:
scandium, yttrium, lanthanum, titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, iron, cobalt, nickel, copper, zinc, boron, aluminum, silicon, germanium, beryllium, magnesium, calcium, strontium, barium, lithium, sodium, potassium, rubidium, and caesium.
6. The electrochemical device of claim 1 , wherein said ceramic sub-layers comprise silicides of at least one element selected from the group comprising:
scandium, yttrium, lanthanum, titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, iron, cobalt, nickel, copper, zinc, boron, aluminum, carbon, germanium, beryllium, magnesium, calcium, strontium, barium, lithium, sodium, potassium, rubidium, and caesium.
7. The electrochemical device of claim 1 , wherein said ceramic sub-layers comprise borides of at least one element selected from the group comprising:
scandium, yttrium, lanthanum, titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, iron, cobalt, nickel, copper, zinc, aluminum, carbon, silicon, germanium, beryllium, magnesium, calcium, strontium, barium, lithium, sodium, potassium, rubidium, and caesium.
8. The electrochemical device of claim 1 , wherein said environmentally sensitive layer comprises at least one material selected from the group consisting of:
lithium alloy, lithium solid solution, metallic lithium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, niobium, molybdenum, palladium, silver, hafnium, tantalum, tungsten, iridium, platinum, gold, beryllium, magnesium, calcium, strontium, barium, boron, aluminum, indium, carbon, silicon, germanium, tin, lead, phosphorus, arsenic, antimony, and bismuth.
9. The electrochemical device of claim 1 , wherein at least one sub-layer of said encapsulation layer is deposited using sputtering from a metallic target.
10. The electrochemical device of claim 1 , wherein at least one sub-layer of said encapsulation layer is deposited using a dual sputter cathode deposition method.
11. The electrochemical device of claim 1 , wherein said at least one area of the encapsulation layer serves as one electrical terminal of said device.
12. The electrochemical device of claim 1 , wherein said encapsulation layer is flexible.
13. The electrochemical device of claim 1 , wherein said alternating metallic and blocking layers comprise at least two metallic sub-layers and at least two ceramic sub-layers, respectively.
14. The electrochemical device of claim 1 , wherein the total thickness of every metallic layer and every ceramic layer is less than about 5 μm.
15. An electrochemical device comprising:
a cathode;
an electrolyte deposited on said cathode;
a soft, environmentally sensitive anode deposited on said electrolyte;
a modulating layer on said anode; and
an encapsulation layer, comprising a plurality of alternating metallic and ceramic sub-layers, deposited on said modulating layer,
wherein at least one area of said encapsulation layer corresponding to the anode is selectively conductive and another area is insulating.
16. The electrochemical device of claim 15 , wherein said alternating metallic and blocking layers comprise at least two metallic sub-layers and at least two ceramic sub-layers, respectively.
17. The electrochemical device of claim 16 , wherein the total thickness of every metallic layer and every ceramic layer is less than about 5 μm.
18. An electrochemical device comprising:
a cathode greater than about 0.5 μm and less than about 200 μm thick;
an electrolyte less than about 5 μm thick;
an anode greater than about 0.1 μm and less than about 30 μm thick;
a plurality of alternating metallic and ceramic sub-layers; and
wherein at least one area of said plurality of alternating metallic and ceramic sub-layers corresponding to the anode is selectively conductive and another area is insulating.
19. The electrochemical device of claim 18 , wherein said alternating metallic and blocking layers comprise at least two metallic sub-layers and at least two ceramic sub-layers, respectively.
20. The electrochemical device of claim 19 , wherein the total thickness of every metallic layer and every ceramic layer is less than about 5 μm.