Positive electrode active material and preparation method thereof, positive electrode plate, secondary battery, battery module, battery pack, and electric apparatus
US-2024429384-A1 · Dec 26, 2024 · US
Negative electrode for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery
US2025210623A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2025210623-A1 |
| Application number | US-202318849704-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 8, 2023 |
| Priority date | Mar 25, 2022 |
| Publication date | Jun 26, 2025 |
| Grant date | — |
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Abstract
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A negative electrode for a nonaqueous electrolyte secondary battery. The negative electrode has a negative electrode mixture layer containing a negative electrode active material. The negative electrode active material includes a first material containing silicon and a second material having a reaction potential with Li higher than silicon. The content Cs of the silicon in the negative electrode mixture layer is 10 mass % or more.
First claim
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1 . A negative electrode for a nonaqueous electrolyte secondary battery, the negative electrode having a negative electrode mixture layer containing a negative electrode active material, the negative electrode active material including a first material containing silicon and a second material having a reaction potential with Li higher than silicon, and a content Cs of the silicon in the negative electrode mixture layer being 10 mass % or more. 2 . The negative electrode for a nonaqueous electrolyte secondary battery according to claim 1 , wherein a content C1 of the first material in the negative electrode mixture layer is higher than a content C2 of the second material in the negative electrode mixture layer. 3 . The negative electrode for a nonaqueous electrolyte secondary battery according to claim 1 , wherein the content Cs of the silicon in the negative electrode mixture layer is higher than the content C2 of the second material in the negative electrode mixture layer. 4 . The negative electrode for a nonaqueous electrolyte secondary battery according to claim 1 , wherein the content C2 of the second material in the negative electrode mixture layer is 0.5 mass % or more. 5 . The negative electrode for a nonaqueous electrolyte secondary battery according to claim 1 , wherein the second material includes a lithium-titanium composite oxide. 6 . The negative electrode for a nonaqueous electrolyte secondary battery according to claim 1 , wherein the first material contains phases of the silicon and a matrix phase in which the phases of the silicon are dispersed, and the matrix phase includes at least one selected from the group consisting of a silicon oxide phase and a carbon phase. 7 . The negative electrode for a nonaqueous electrolyte secondary battery according to claim 6 , wherein the silicon oxide phase includes lithium silicate. 8 . The negative electrode for a nonaqueous electrolyte secondary battery according to claim 6 , wherein the second material is further dispersed in the matrix phase in which the phases of the silicon are dispersed. 9 . The negative electrode for a nonaqueous electrolyte secondary battery according to claim 1 , wherein the negative electrode active material further contains carbonaceous particles. 10 . A nonaqueous electrolyte secondary battery, comprising: a positive electrode; the negative electrode of claim 1 ; a separator disposed between the positive electrode and the negative electrode; and a nonaqueous electrolyte.
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Classifications
Li-accumulators · CPC title
Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · CPC title
- H01M4/364Primary
as mixtures · CPC title
of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title
for inserting or intercalating light metals · CPC title
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- What does patent US2025210623A1 cover?
- A negative electrode for a nonaqueous electrolyte secondary battery. The negative electrode has a negative electrode mixture layer containing a negative electrode active material. The negative electrode active material includes a first material containing silicon and a second material having a reaction potential with Li higher than silicon. The content Cs of the silicon in the negative electrod…
- Who is the assignee on this patent?
- Panasonic Ip Man Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/364. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Jun 26 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).