Thin film battery and localized heat treatment
A lithium battery comprises a battery support and a cathode current collector directly on and in contact with the battery support. The cathode current collector is composed of molybdenum and comprises a thickness of at least about 0.01 microns. A cathode is on the cathode current collector, an electrolyte on the cathode, and at least one of an anode or anode current collector on the electrolyte.
1. A lithium battery comprising:
(a) a battery support;
(b) a cathode current collector directly on and in contact with the battery support, the cathode current collector having a thickness of at least about 0.01 microns;
(c) a non-oxygen annealed cathode on the cathode current collector, the cathode capable of providing a battery capacity of 1 mAh at a discharge current of 0.1 mA;
(d) an electrolyte on the cathode; and
(e) at least one of an anode or anode current collector on the electrolyte.
2. A battery according to claim 1 which is absent an adhesion layer between the cathode current collector and the support.
3. A battery according to claim 1 wherein the cathode comprises a thickness of at least 50 microns.
4. A battery according to claim 1 wherein the cathode comprises at least one of the following:
(i) a metal oxide;
(ii) a lithium metal oxide;
(iii) at least one of lithium cobalt oxide, lithium nickel oxide, lithium manganese oxide, lithium iron oxide, or a lithium oxide comprising mixtures of transition metals; and
(iv) amorphous vanadium pentoxide, crystalline V 2 O 5 or TiS 2 .
5. A battery according to claim 1 wherein the electrolyte comprises a solid-state lithium-containing layer.
6. A battery according to claim 1 wherein the anode or anode current collector comprises aluminum, platinum, silver or gold.
7. A lithium battery manufacturing method comprising:
(a) providing a support;
(b) forming a cathode current collector directly on the battery support and without an intervening adhesion layer, the cathode current collector composed of molybdenum and having a thickness of at least about 0.01 microns;
(c) depositing a cathode on the cathode current collector, and annealing the cathode in a non-oxygen containing environment, to provide a battery capacity of 1 mAh at a discharge current of 0.1 mA;
(d) forming an electrolyte on the cathode; and
(e) forming an anode on the electrolyte.
8. A method according to claim 7 wherein (c) further comprises scanning an energy beam across the cathode, the energy beam having a fluence of at least about 10 J/cm 2 .
9. A method according to claim 8 comprising selecting an energy beam having at least one of the following properties:
(i) a beam width of less than about 1000 microns;
(ii) an energy beam that is a CO2 laser beam; and
(iii) a wavelength of from about 1 to about 100 microns.