Multi-layer lithium metal battery negative electrode, and preparation method and preparation device therefor

Abstract

The present invention relates to a multi-layer lithium metal battery negative electrode, and a preparation method and preparation device therefor. The multi-layer lithium metal battery negative electrode comprises a current collector, a lithium metal layer, a fast ion conductor layer and a functional protection layer. The present invention also relates to a method for preparing the multi-layer lithium metal battery negative electrode, the method characterized by comprising the following steps: (1) a step of evaporating a lithium metal; (2) a step of evaporating a fast ion conductor; and (3) a step of coating a protective material and a polymer solid electrolyte. In addition, the present invention relates to a device for preparing the multi-layer lithium metal battery negative electrode. The multi-layer lithium metal battery negative electrode of the present invention utilizes the composite synergistic effect of the lithium metal layer, the fast ion conductor layer and the functional protection layer, such that the cycling performance, cycling life and safety performance of a lithium metal battery are significantly improved, and the problem of a lithium dendrite appearing in a lithium metal negative electrode is solved.

Dependencies are inferred from the claim text.