Liquid Electrolyte Composition, and Electrochemical Cell Comprising Said Electrolyte Composition
US-2024347772-A1 · Oct 17, 2024 · US
Negative electrode for secondary battery and secondary battery including the same
US2023207793A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2023207793-A1 |
| Application number | US-202218077522-A |
| Country | US |
| Kind code | A1 |
| Filing date | Dec 8, 2022 |
| Priority date | Dec 28, 2021 |
| Publication date | Jun 29, 2023 |
| Grant date | — |
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Abstract
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Provided is a negative electrode for a secondary battery satisfying the following Relation 1: [Relation 1] (V1−V2)/V1*100≥45% wherein V1 is a volume fraction (vol %) of silicon-based active material particles having a gray scale value of 30,000 or more in an XRM measurement on a negative electrode in a fully discharged state after formation, and V2 is a volume fraction (vol %) of silicon-based active material particles having a gray scale value of 30,000 or more in an XRM measurement on a negative electrode in a fully charged state after 500 cycles of charging and discharging.
First claim
Opening claim text (preview).
What is claimed is: 1 . A negative electrode for a secondary battery satisfying the following Relation 1: ( V 1 −V 2 )/ V 1 *100≥45% [Relation 1] wherein V 1 is a volume fraction (vol %) of silicon-based active material particles having a gray scale value of 30,000 or more in an XRM measurement on a negative electrode in a fully discharged state after formation, and V 2 is a volume fraction (vol %) of silicon-based active material particles having a gray scale value of 30,000 or more in an XRM measurement on a negative electrode in a fully charged state after 500 cycles of charging and discharging. 2 . The negative electrode for a secondary battery of claim 1 , wherein the silicon-based active material includes one of Si, SiO x (0<x≤2), a Si-containing alloy, and a Si/C composite, or a combination thereof. 3 . The negative electrode for a secondary battery of claim 1 , wherein the negative electrode further includes a carbon-based active material. 4 . The negative electrode for a secondary battery of claim 3 , wherein the carbon-based active material includes crystalline carbon. 5 . The negative electrode for a secondary battery of claim 1 , wherein the negative electrode includes an acryl-based binder. 6 . The negative electrode for a secondary battery of claim 1 , wherein the negative electrode includes a carbon nanotube conductive material, and the conductive material is included at less than 5 wt % with respect to a total weight of a negative electrode active material layer. 7 . The negative electrode for a secondary battery of claim 6 , wherein the conductive material includes single-walled carbon nanotubes (SWCNT). 8 . A secondary battery comprising the negative electrode of claim 1 .
Assignees
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Classifications
Energy storage using batteries · CPC title
Negative electrodes · CPC title
Physical characteristics, e.g. porosity, surface area · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
for inserting or intercalating light metals · CPC title
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- What does patent US2023207793A1 cover?
- Provided is a negative electrode for a secondary battery satisfying the following Relation 1: [Relation 1] (V1−V2)/V1*100≥45% wherein V1 is a volume fraction (vol %) of silicon-based active material particles having a gray scale value of 30,000 or more in an XRM measurement on a negative electrode in a fully discharged state after formation, and V2 is a volume fraction (vol %) of silicon-based …
- Who is the assignee on this patent?
- Sk On Co Ltd, Sk Innovation Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/483. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Jun 29 2023 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).