NEGATIVE ELECTRODE PLATE, SECONDARY BATTERY, AND ELECTRONIC DEVICE

A negative electrode plate includes a negative current collector, the negative current collector includes a substrate layer and a conductive coating disposed on a surface of the substrate layer. The conductive coating includes a conductive agent and a binder. A material of the substrate layer includes at least one selected from the group consisting of polypropylene, polyethylene, polyethylene terephthalate, cellulose, polyimide, polyamide, spandex, and aramid. A porosity of the substrate layer is 10% to 50%. Tensile strength of the substrate layer is 130 MPa to 200 MPa. The negative current collector includes the substrate layer and the conductive coating, and the porosity and the tensile strength of the substrate layer are controlled within the above ranges, thereby improving the safety, reliability, and C-rate performance of the secondary battery.