Silicon particles for battery electrodes
US-2020313167-A1 · Oct 1, 2020 · US
Anisotropic expansion of silicon-dominant anodes
US11764350B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11764350-B2 |
| Application number | US-202016845521-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 10, 2020 |
| Priority date | Nov 5, 2019 |
| Publication date | Sep 19, 2023 |
| Grant date | Sep 19, 2023 |
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- Title
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Abstract
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Systems and methods for anisotropic expansion of silicon-dominant anodes may include a cathode, an electrolyte, and an anode, where the anode may include a current collector and an active material on the current collector. An expansion of the anode during operation may be configured by a thickness of the current collector. The expansion of the anode may be more anisotropic for thicker current collectors. A thicker current collector may be 10 μm thick or greater. The expansion of the anode may be more anisotropic for more rigid materials used for the current collector. A more rigid current collector may include nickel and a less rigid current collector may include copper. The expansion of the anode may be more anisotropic for a rougher surface current collector.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of forming a battery, the method comprising: forming a battery comprising a cathode, an electrolyte, and an anode, the anode comprising a current collector and an active material on the current collector, the active material comprising a pyrolyzed binder and 50% or greater silicon by weight; and controlling or adjusting an expansion of the anode during operation based on a selection of a thickness of the current collector so that the anode expands less in one of the x-y directions and the z-direction while expanding more in a different one of the x-y directions and the z-direction, wherein the thickness is selected, at least in part, based on a material of the current collector. 2. The method according to claim 1 , wherein the expansion of the anode is more anisotropic for the anode with a thicker current collector with more anode thickness expansion and less lateral expansion as compared to an anode with a thinner current collector. 3. The method according to claim 2 , wherein the thicker current collector is 6 μm thick or greater. 4. The method according to claim 2 , wherein the thicker current collector is 10 μm thick or greater. 5. The method according to claim 2 , wherein the thicker current collector is 20 μm thick or greater. 6. The method according to claim 1 , wherein lateral expansion of the anode is less than 2% with a 10 μm thick current collector. 7. The method according to claim 1 , wherein lateral expansion of the anode is less than 5% with a 6 μm thick current collector.
Assignees
Inventors
Classifications
- H01M10/052Primary
Li-accumulators · CPC title
- H01M4/0404Primary
by coating on electrode collectors · CPC title
- H01M4/134Primary
Electrodes based on metals, Si or alloys · CPC title
involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title
Selection of materials · CPC title
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- What does patent US11764350B2 cover?
- Systems and methods for anisotropic expansion of silicon-dominant anodes may include a cathode, an electrolyte, and an anode, where the anode may include a current collector and an active material on the current collector. An expansion of the anode during operation may be configured by a thickness of the current collector. The expansion of the anode may be more anisotropic for thicker current c…
- Who is the assignee on this patent?
- Enevate Corp
- What technology area does this patent fall under?
- Primary CPC classification H01M10/052. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 19 2023 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).