Negative electrode plate, electrochemical device containing same, and electronic device

An electrochemical device, comprising:

• a negative electrode plate, wherein the negative electrode plate comprises a negative current collector, a lithium metal negative electrode, and a negative electrode framework,
• wherein a polarization electric field exists inside the negative electrode framework, a direction of the polarization electric field is directed from a surface of the negative electrode plate to the negative current collector, and a material of the negative electrode framework comprises a piezoelectric polymer;
• wherein a room-temperature coercive field strength Ec of the material of the negative electrode framework satisfies:
• 10 kV/mm<Ec<100 kV/mm;
• and
• wherein the negative electrode framework was polarized in an electric field having a strength of 1 to 6 times the room-temperature coercive field strength Ec to generate the polarization electric field inside the negative electrode frame.