| abstract |
The invention relates to a pole piece, a preparation method of the pole piece, a battery core and a battery, wherein the pole piece comprises: a current collector, a positive electrode layer and a negative electrode layer, wherein the current collector comprises a first surface and a second surface opposite to the first surface The positive electrode layer is stacked on the first side of the current collector; the negative electrode layer is stacked on the second side of the current collector; wherein, the positive electrode layer and the negative electrode layer are membranes comprising fibrous polymers. The positive and negative electrodes of the pole piece are integrated, which can realize the inner string assembly of the battery, and can effectively improve the energy density of the battery cell without increasing the production cost. |