Electrode and preparation method and application thereof

The invention discloses an electrode and a preparation method and application thereof. The electrode comprises a current collector and electrode plates compounded on the two sides of the current collector; the electrode plate is obtained by rolling an electrode material containing a positive electrode active material, a porous additive, a conductive agent and a polytetrafluoroethylene binder; the porous additive is selected from at least one of zeolite and a metal organic framework material. The porous additive is doped in the positive electrode active layer, the electrode prepared by the method is high in strength and large in specific surface area, and the porous structure of the additive not only contributes to construction of a three-dimensional conductive network, but also can enhance the wettability of the pole piece, so that the problems of poor conductivity, poor contact and the like of a thick pole piece are avoided. By introducing the lithium-containing additive, a lithium supplementing effect is ac