Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology Limited

Yanyun Tan

Fuping Luo

Shengwei Wang

Qiaoge Wang

Xinxin Du

Chuanmiao Yan

Manfang Zhang

The present disclosure provides a lithium-ion secondary battery, which comprises a positive electrode plate, a negative electrode plate, a separator and an electrolyte. The lithium-ion secondary battery satisfies a relationship: 1.5&#x2264;(m&#xd7;C)/(&#x3c1;&#xd7;Cap)&#x2264;6.5. In the present disclosure, by comprehensively considering the rated capacity of the battery, the mass of the electrolyte and the intrinsic parameters of the electrolyte and reasonably quantifying the relationship thereof, the lithium-ion secondary battery can have good dynamics performance and longer cycle life at the same time.

Lithium-ion secondary battery

The present disclosure provides a positive electrode plate and a battery, the positive electrode plate comprises a positive current collector and a positive film, the positive film is provided on least one surface of the positive current collector and comprises a positive active material, the positive active material comprises a layered lithium-containing compound, and an OI value of the positive film represented by Cis less than or equal to 150. The positive electrode plate of the present disclosure has smaller swelling and excellent dynamics performance, and the battery of the present disclosure has high safety performance, excellent dynamics performance and long cycle life at the same time.

Positive electrode plate and battery

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Ningde, China

Yanyun Tan