Lithium supplement binder as well as preparation method and application thereof

The invention provides a lithium supplement binder and a preparation method and application thereof. The method comprises the following steps: (1) providing an ionic polymer; and (2) carrying out lithiation treatment on the ionic polymer obtained in the step (1) to obtain the lithium supplement binder. From the perspective of the binder, the ionic polymer subjected to lithiation treatment is used as the binder, so that lithium supplementation is realized, the battery capacity and the first efficiency are improved, the overall impedance of the battery cell is reduced, and the rate and the quick charge performance of the battery cell are improved. In addition, the method is simple to operate and easy for large-scale popularization. 本发明提供一种补锂粘结剂及其制备方法和应用，所述方法包括以下步骤：(1)提供离子型聚合物；(2)对步骤(1)所述离子型聚合物进行锂化处理，得到所述补锂粘结剂。本发明从粘结剂的角度出发，将锂化处理的离子型聚合物作为粘结剂，不仅实现了补锂，提高了电池容量和首效，而且降低了电芯的整体阻抗，提高了电芯的倍率和快充性能。此外，该方法操作简单，易于大规模推广。