Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology (Hong Kong) Limited

Mingkui Guo

Yaohui Wang

Tiansheng Wang

Yaping Huang

Yongshou Lin

Fenggang Zhao

The present application discloses a negative electrode, a secondary battery and a device comprising the same. The negative electrode includes: a current collector; a first active material layer close to the current collector, the first active material layer including a first active material; and a second active material layer disposed on a surface of the first active material layer away from the current collector, the second active material layer including a second active material; wherein the first active material and the second active material are independently oval-like particles with through holes and/or blind holes, and the first active material has an average pore size greater than that of the second active material.

Negative electrode, secondary battery and device comprising same

This application provides a positive-electrode plate, including a current collector, and a first active substance layer and a second active substance layer that are sequentially disposed on a surface of the current collector. The first active substance layer includes a first positive-electrode active material, and the first positive-electrode active material includes at least one of a compound represented by Formula (I) LiMnMOAor a compound represented by Formula (II) LiMnNOB. The second active substance layer includes a second positive-electrode active material having a pH value of from 10˜12. In this application, the active substance layer that includes high-pH positive-electrode active material is disposed outside the active substance layer that includes a lithium manganese-based positive-electrode active material, so as to make a layered electrode plate.

Positive-electrode plate and manufacturing method thereof, lithium-ion secondary battery, battery module, battery pack, and apparatus

The present application relates to the electrochemical field, and in particular, to a negative electrode plate and a secondary battery including the electrode plate. The present application provides a negative electrode plate. The negative electrode plate includes a negative electrode current collector, a first negative electrode active substance layer disposed on at least one surface of the negative electrode current collector, and a second negative electrode active substance layer disposed on the first negative electrode active substance layer. The first negative electrode active substance layer includes a first negative electrode active substance, and the second negative electrode active substance layer includes a second negative electrode active substance. The first negative electrode active substance satisfies 1 GPa&#x2264;Young's modulus&#x2264;10 GPa, and the second negative electrode active substance satisfies 11 GPa&#x2264;Young's modulus&#x2264;30 GPa.

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Ningde, China

Mingkui Guo