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US-11876225-B2 · Jan 16, 2024 · US
Electrolytic foil and battery current collector
US12476256B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12476256-B2 |
| Application number | US-202017768966-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 29, 2020 |
| Priority date | Oct 16, 2019 |
| Publication date | Nov 18, 2025 |
| Grant date | Nov 18, 2025 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
An electrolytic foil and a battery current collector is provided in which the risk of breakage or tearing during manufacturing presented by reduced thickness can be restrained, and which possess sufficient strength for repeated charging and discharging in a secondary battery. The electrolytic foil and the battery current collector contain a Ni—Fe alloy layer, having a thickness of 1.5 to 10 μm and having a first surface and a second surface and wherein the value of a three-dimensional surface properties parameter Sv divided by the thickness is equal to or less than 0.5 for the first surface and the second surface.
First claim
Opening claim text (preview).
The invention claimed is: 1 . An electrolytic foil containing a Ni—Fe alloy layer, the electrolytic foil being characterized by having a thickness of 1.5 to 10 μm, by having a first surface and a second surface, and by that a value of a maximum valley depth Sv divided by the thickness is equal to or less than 0.5 for the first surface and the second surface, wherein at least one metallic layer of a metallic species different from the Ni—Fe alloy layer is laminated on the Ni—Fe alloy layer, and wherein a proportion of the thickness of the Ni—Fe alloy layer in the electrolytic foil is 18% to 95%. 2 . The electrolytic foil according to claim 1 , wherein the thickness is 2.0 to 8.0 μm. 3 . The electrolytic foil according to claim 1 , wherein a thickness of the Ni—Fe alloy layer is 2.0 to 9.9 μm. 4 . The electrolytic foil according to claim 1 , wherein a total thickness of the at least one metallic layer is 0.1 to 8.0 μm. 5 . The electrolytic foil according to claim 1 , wherein tensile strength of the electrolytic foil exceeds 720 MPa. 6 . A battery current collector comprising: the electrolytic foil according to claim 1 .
Assignees
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Classifications
characterised by shape or form · CPC title
containing more than 50% by weight of iron or nickel or cobalt · CPC title
Electroplating with more than one layer of the same or of different metals (for bearings C25D7/10) · CPC title
in the form of layers, e.g. coatings · CPC title
- H01M4/662Primary
Alloys (collectors of lead alloys H01M4/685) · CPC title
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- What does patent US12476256B2 cover?
- An electrolytic foil and a battery current collector is provided in which the risk of breakage or tearing during manufacturing presented by reduced thickness can be restrained, and which possess sufficient strength for repeated charging and discharging in a secondary battery. The electrolytic foil and the battery current collector contain a Ni—Fe alloy layer, having a thickness of 1.5 to 10 μm …
- Who is the assignee on this patent?
- Toyo Kohan Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/662. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 18 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).