Negative electrode sheet and method for preparing the same, secondary battery, battery module, battery pack, and device
US-11646417-B2 · May 9, 2023 · US
Negative electrode and lithium secondary battery
US12463197B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12463197-B2 |
| Application number | US-202519172807-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 8, 2025 |
| Priority date | Jul 28, 2023 |
| Publication date | Nov 4, 2025 |
| Grant date | Nov 4, 2025 |
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Abstract
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A negative electrode for a secondary battery includes a current collector and a negative electrode active material layer provided on at least one surface of the current collector. The negative electrode active material layer includes a first region corresponding to 50% of a total thickness of the negative electrode active material layer from a surface facing the current collector and a second region corresponding to 50% of the total thickness of the negative electrode active material layer from a surface opposite to the surface facing the current collector. The negative electrode active material layer includes two or more types of negative electrode active materials having D50 different from each other and satisfies the Equations 1 and 2. A secondary battery including the negative electrode is also provided.
First claim
Opening claim text (preview).
What is claimed is: 1 . A negative electrode for a lithium secondary battery comprising: a current collector and a negative electrode active material layer provided on at least one surface of the current collector, wherein: the negative electrode active material layer comprises a first region corresponding to 50% of a total thickness of the negative electrode active material layer from a surface facing the current collector and a second region corresponding to 50% of the total thickness of the negative electrode active material layer from a surface opposite to the surface facing the current collector; a composition of a negative electrode active material in the first region and a composition of a negative electrode active material in the second region are different; and the negative electrode active material layer comprises two or more chemical types of negative electrode active materials having D50 different from each other and satisfies following Equations 1 and 2: - 3 ≤ ( ❘ "\[LeftBracketingBar]" D 50 , total - D 50 , 1 st ❘ "\[RightBracketingBar]" ÷ D 50 , total × 100 ) ≤ 3 ( 1 ) - 3 ≤ ( ❘ "\[LeftBracketingBar]" D 50 , total - D 50 , 2 nd ❘ "\[RightBracketingBar]" ÷ DS 0 , total × 100 ) ≤ 3 , ( 2 ) wherein: D50, total is D50 of the two or more chemical types of the negative electrode active materials in the negative electrode active material layer, D50,1st is D50 of the negative electrode active material in the first region, and D50,2nd is D50 of the negative electrode active material in the second region. 2 . The negative electrode for a lithium secondary battery of claim 1 , wherein the negative electrode active material layer comprises three or more chemical types of negative electrode active materials having D50 different from each other. 3 . The negative electrode for a lithium secondary battery of claim 1 , wherein at least one of the first region or the second region comprises two or more chemical types of negative electrode active materials having D50 different from each other. 4 . The negative electrode for a lithium secondary battery of claim 1 , wherein the first region and the second region comprise two or more chemical types of negative electrode active materials having D50 different from each other. 5 . The negative electrode for a lithium secondary battery of claim 1 , wherein the negative electrode active material layer has a structure of two or more layers. 6 . The negative electrode for a lithium secondary battery of claim 1 , wherein the negative electrode active material layer comprises: a first negative electrode active material layer provided on the current collector; and a second negative electrode active material layer provided on the first negative electrode active material layer. 7 . The negative electrode for a lithium secondary battery of claim 6 , wherein at least one of the first negative electrode active material layer or the second negative electrode active material layer comprises two or more chemical types of negative electrode active materials having D50 different from each other and satisfies following Equations 3 and 4: - 3 ≤ (
Assignees
Inventors
Classifications
for inserting or intercalating light metals · CPC title
Negative electrodes · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title
Positive electrodes · CPC title
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- What does patent US12463197B2 cover?
- A negative electrode for a secondary battery includes a current collector and a negative electrode active material layer provided on at least one surface of the current collector. The negative electrode active material layer includes a first region corresponding to 50% of a total thickness of the negative electrode active material layer from a surface facing the current collector and a second r…
- Who is the assignee on this patent?
- Lg Energy Solution Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/133. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 04 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 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).