Negative pole piece, and electrochemical device and electronic device comprising same

The invention discloses a negative pole piece, and an electrochemical device and an electronic device comprising the same, the negative pole piece comprises a negative current collector and a negative film layer, the negative film layer is arranged on at least one surface of the negative current collector, the negative film layer comprises a negative active material and a negative additive, the negative additive comprises a metal salt, and the metal salt is a metal salt. The metal salt comprises metal cations and non-metal anions; metal cations in the metal salt comprise at least one cation of Li, Na, K, Mg, Ca, Ni, Co, Fe, Cu, Zn, Al and Sn; the nonmetal anions in the metal salt comprise at least one of F element, B element, P element and S element. 本申请公开了一种负极极片、以及包含其的电化学装置及电子装置，负极极片包括负极集流体以及负极膜层，负极膜层设置于负极集流体的至少一个表面上，负极膜层包括负极活性材料和负极添加剂，负极添加剂包括金属盐，金属盐包括金属阳离子和非金属阴离子；金属盐中的金属阳离子包括Li、Na、K、Mg、Ca、Ni、Co、Fe、Cu、Zn、Al、Sn中的至少一种阳离子；金属盐中的非金属阴离子包括F元素以及B元素、P元素、S元素中的至少一种。