Ningde Amperex Technology Limited

Chenxi Jiang

Xinghua Tao

Fan Yang

Yafei Zhang

Hongming Yu

An electrochemical apparatus includes a positive electrode sheet including a positive electrode active material layer; a negative electrode sheet including a negative electrode active material layer; and a separator disposed between the positive electrode sheet and the negative electrode sheet. A mass ratio of fluorine to nitrogen on a surface layer of the positive electrode active material layer is A, a mass ratio of fluorine to nitrogen on a surface layer of the negative electrode active material layer is B, 3≤A≤50, and 30≤B≤300.

Electrochemical apparatus, preparation method therefor, and electronic apparatus

An electrochemical apparatus includes a positive electrode plate including a positive electrode active material layer; a negative electrode plate including a negative electrode active material layer; and a separator disposed between the positive electrode plate and the negative electrode plate. A mass ratio of fluorine to sulfur in a surface layer of the positive electrode active material layer is A, and a mass ratio of fluorine to sulfur in a surface layer of the negative electrode active material layer is B, where 30≤A≤300, and 5≤B≤50.

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Ningde, China

Chenxi Jiang