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US 12,305,309 B2Granted
Composite metal foil
AssigneeIndustrial Technology Research Institute
InventorsChiu-Yen Chiu, Li-Ju Chen, Sheng-Hui Wu, Chia-Chen Fang
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Abstract
A composite metal foil and a method of manufacturing the same are provided. The composite metal foil includes at least a first metal layer and a second metal layer. The first metal layer is copper foil, nickel foil, stainless steel foil, or a combination thereof. The second metal layer is disposed on a surface of the first metal layer. A contact angle of a surface of the second metal layer to liquid lithium metal is lower than 90 degrees.
Claims7
A composite metal foil, comprising:
- a first metal layer, being a copper foil, a nickel foil, a stainless steel foil, or a combination thereof;
- a second metal layer, disposed on a surface of the first metal layer, wherein the second metal layer comprises Sn, In, Ag, Zn, zinc alloy, tin alloy, indium alloy, or a combination thereof;
- and
- an alloy layer, formed between the first metal layer and the second metal layer, wherein
- a contact angle of a surface of the second metal layer to liquid lithium metal is lower than 90 degrees, wherein the contact angle is obtained by placing a titanium foil and the composite metal foil on a heating plate at 210° C., placing a lithium foil on the titanium foil and twisting into a spherical shape, and after the lithium foil was melted into a metal ball, moving the metal ball to a surface of the composite metal foil followed by measuring the contact angle within 10 seconds, and
- the first metal layer is composed of a first metal element, the second metal layer is composed of a second metal element, and the alloy layer is formed by alloying the first metal layer and the second metal layer, wherein a thickness of the second metal layer is 5 nm to 500 nm, and
- a surface roughness Rz of the composite metal foil is ≤2 μm.
4 more elements
Dependencies are inferred from the claim text.