Metal sulfide anolytes for electrochemical cells
First Claim
1. A negative electrode assembly for a rechargeable electrochemical cell, the negative electrode assembly comprising:
- a current collector layer comprising a metal selected from the group consisting of copper, nickel, iron, lithium, aluminum, magnesium, indium, tungsten, molybdenum, alloys thereof, multilayers thereof, and combinations thereof; and
an anolyte layer comprising a lithium sulfide compound disposed over the current collector metal layer and having a thickness between 1 nm and 100 nm;
wherein the anolyte layer directly contacts a sulfide-containing solid electrolyte layer; and
a lithium metal layer disposed between the current collector metal layer and the anolyte layer.
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Accused Products
Abstract
Provided are negative electrode assemblies containing lithium sulfide anolyte layers, electrochemical cells including these assemblies, and methods of forming thereof. An anolyte layer may be disposed over a metal layer of a current collector and may be used to separate the current collector from the rest of the electrolyte. The metal layer may include copper or any other suitable metal that forms in situ a metal sulfide during fabrication of the electrode assembly. Specifically, a sulfur containing layer, such as a solid electrolyte, is formed on the metal layer. Sulfur from this layer reacts with the metal of the current collector and forms a metal sulfide layer. When lithium is later added to the metal sulfide layer, a lithium sulfide anolyte layer is formed while the metal layer is recovered. Most, if not all operations may, be performed in situ during fabrication of electrochemical cells.
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Citations
30 Claims
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1. A negative electrode assembly for a rechargeable electrochemical cell, the negative electrode assembly comprising:
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a current collector layer comprising a metal selected from the group consisting of copper, nickel, iron, lithium, aluminum, magnesium, indium, tungsten, molybdenum, alloys thereof, multilayers thereof, and combinations thereof; and an anolyte layer comprising a lithium sulfide compound disposed over the current collector metal layer and having a thickness between 1 nm and 100 nm; wherein the anolyte layer directly contacts a sulfide-containing solid electrolyte layer; and a lithium metal layer disposed between the current collector metal layer and the anolyte layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A battery comprising:
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a positive electrode; and a negative electrode, the negative electrode comprising a current collector metal layer comprising a metal selected from the group consisting of copper, nickel, iron, lithium, aluminum, magnesium, indium, tungsten, molybdenum, alloys thereof, multilayers thereof, and combinations thereof; a sulfide-containing solid electrolyte layer disposed between the positive electrode and the negative electrode and providing ionic communication between the positive electrode and the negative electrode, the sulfide-containing solid electrolyte comprising an anolyte layer disposed over the current collector metal layer, wherein the anolyte layer comprises a lithium sulfide compound and has a thickness between about 10 nm and 1 μ
m, anda lithium metal layer disposed between the current collector metal layer and the anolyte layer.
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Specification