Negative electrode plate, secondary battery and power consumption device

The negative electrode plate design with strategically matched silicon-based materials improves structural stability and cycle performance by using a first active layer with higher sphericity and specific composition ratios, addressing the stability issues in silicon-based secondary batteries.

JP7888882B2Active Publication Date: 2026-07-13CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
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Patent Information

Application Number
JP2025543357
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2023-07-11
Filing Date
2024-01-16
Publication Date
2026-07-13
Estimated Expiration
2044-01-16

AI Technical Summary

Technical Problem

Secondary batteries using silicon-based materials face issues with structural stability and cycle performance due to poor electrode plate stability after charging.

Method used

A negative electrode plate design featuring a first active layer with a silicon-based material of higher sphericity than a second active layer, along with specific mass and surface area ratios, improves structural stability and cycle performance.

Benefits of technology

Enhances the structural stability and cycle performance of secondary batteries by optimizing the sphericity and composition of silicon-based materials in the electrode layers.

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Abstract

The present application provides a negative electrode plate, a secondary battery, and a power consumption device, the negative electrode plate including a negative electrode current collector, and a first active layer and a second active layer located on at least one surface of the negative electrode current collector, the first active layer being located between the negative electrode current collector and the second active layer, the first active layer including a first silicon-based material, and the second active layer including a second silicon-based material, the sphericity of the first silicon-based material being greater than the sphericity of the second silicon-based material, the sphericity of the first silicon-based material being 0.6 or greater.
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Citation Information

Patent Citations

  • Sulfates used as electrode materials

    JP2015515084A