MultiLayer solid electrolyte for lithium thin film batteries
First Claim
1. A rechargeable lithium battery device comprising:
- an anode current collector comprising a metal material selected from copper, nickel, chrome ferrous alloy, a refractory metal, or stainless steel, the metal material being substantially inert toward a lithium metal material;
an anode overlaying the anode current collector, and the anode being electrically coupled to the current collector and comprising lithium metal material;
a first electrolyte layer overlaying the anode consisting of Li2S, Li2O, or combinations thereof, the first electrolyte layer being substantially stable toward lithium metal material, the first electrolyte layer being characterized by a first deposition rate and a thickness of 10-100 nm;
a second electrolyte layer in direct contact with the first electrolyte layer and comprising at least one of lithium nitride, lithium fluoride, or lithium aluminum fluoride, the second electrolyte layer being characterized by a second deposition rate;
a cathode overlaying the second electrolyte layer; and
a cathode current collector overlaying the cathode;
wherein the first electrolyte layer and the second electrolyte layer are characterized by a total thickness of less than 20 um.
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Accused Products
Abstract
A lithium metal thin-film battery composite structure is provided that includes a combination of a thin, stable, solid electrolyte layer [18] such as Lipon, designed in use to be in contact with a lithium metal anode layer; and a rapid-deposit solid electrolyte layer [16] such as LiAlF4 in contact with the thin, stable, solid electrolyte layer [18]. Batteries made up of or containing these structures are more efficient to produce than other lithium metal batteries that use only a single solid electrolyte. They are also more resistant to stress and strain than batteries made using layers of only the stable, solid electrolyte materials. Furthermore, lithium anode batteries as disclosed herein are useful as rechargeable batteries.
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Citations
19 Claims
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1. A rechargeable lithium battery device comprising:
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an anode current collector comprising a metal material selected from copper, nickel, chrome ferrous alloy, a refractory metal, or stainless steel, the metal material being substantially inert toward a lithium metal material; an anode overlaying the anode current collector, and the anode being electrically coupled to the current collector and comprising lithium metal material; a first electrolyte layer overlaying the anode consisting of Li2S, Li2O, or combinations thereof, the first electrolyte layer being substantially stable toward lithium metal material, the first electrolyte layer being characterized by a first deposition rate and a thickness of 10-100 nm; a second electrolyte layer in direct contact with the first electrolyte layer and comprising at least one of lithium nitride, lithium fluoride, or lithium aluminum fluoride, the second electrolyte layer being characterized by a second deposition rate; a cathode overlaying the second electrolyte layer; and a cathode current collector overlaying the cathode; wherein the first electrolyte layer and the second electrolyte layer are characterized by a total thickness of less than 20 um. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification