Negative electrode for lithium secondary battery and lithium secondary battery including the same
By adopting a double-layer structure and magnetic field treatment technology in the negative electrode material of lithium-ion batteries, the resistance is reduced and the cycle life is improved, and the problems of high resistance and insufficient cycle life of the negative electrode material in the prior art are solved.
JP7653388B2Active Publication Date: 2025-03-28SAMSUNG SDI CO LTD
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Patent Information
- Application Number
- JP2022071475
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2021-04-23
- Filing Date
- 2022-04-25
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2042-04-25
AI Technical Summary
Technical Problem
The existing lithium-ion battery anode materials have problems of high resistance and insufficient cycle life during electrochemical regulation.
Method used
A double-layer negative electrode material structure is adopted, wherein the crystal plane intensity ratio of the first and second layers is measured to be 150 or less by X-ray diffraction (XRD), and is formed by magnetic field treatment and drying and curling steps.
Benefits of technology
It significantly reduces the resistance of the negative electrode material, improves the cycle life and high-temperature cycle performance of lithium-ion batteries.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide a negative electrode for a lithium secondary battery that exhibits reduced electrical resistance and excellent cycle life characteristics.SOLUTION: The present invention relates to a negative electrode for a lithium secondary battery and a lithium secondary battery including the same, the negative electrode for the lithium secondary battery includes a current collector, a first negative electrode active material layer disposed on the current collector and including a first negative electrode active material, and a first negative electrode active material layer disposed on the first negative electrode active material layer and including a second negative electrode active material, and in each of the first negative electrode active material layer and the second negative electrode active material layer, a peak intensity ratio (I(002) / I(110)) of the (002) plane to the (110) plane when measured by XRD using CuKα rays is 150 or less.SELECTED DRAWING: Figure 10
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