Gravure coating device and method for preparing large-width ultrathin metal lithium strip

Abstract

The invention discloses a gravure coating device and method for preparing a large-width ultrathin metal lithium strip, and belongs to the technical field of lithium metal material preparation. The gravure coating device comprises a lithium liquid melting box, a micro concave roller, an unwinding device, a base material back roller, a hot pressing device and a winding device. The lower part of themicro concave roller is immersed into lithium liquid in the lithium liquid melting box; a hot scraper is arranged on one side of the micro concave roller, and the end part of the hot scraper is in contact with the roller surface of the micro concave roller; the base material back roller is arranged at the inclined upper part of the micro concave roller; and the unwinding device is arranged on oneside of the base material back roller, the winding device is arranged above the base material back roller, the hot pressing device is arranged between the base material back roller and the winding device, and a base material on the unwinding device is wound on the winding device after passing through the base material back roller and the hot pressing device. The gravure coating device is simple instructure and reasonable in design, the coating uniformity is effectively improved, the ultrathin metal lithium strip with the thickness of 1-50[mu]m can be automatically produced, and the working efficiency and the product quality are greatly improved.

Description

technical field [0001] The invention relates to the technical field of lithium metal material preparation, in particular to a gravure coating device and a method for preparing large-width and ultra-thin metal lithium strips. Background technique [0002] With the rapid development of new energy vehicles and aviation drones, lithium metal has emerged as a material with high energy density. At present, when metal lithium is used as the negative electrode material to match the positive electrode material, the energy density of lithium batteries cannot be improved due to the high lithium content. Therefore, ultra-thin lithium negative electrodes have become a trend to increase their energy density. [0003] At present, the mass-produced lithium ribbon has a small width, a relatively complicated process, and a thick thickness of more than 50um, and the surface thickness uniformity is poor. Tianjin Zhongneng has made the effective thickness of the lithium strip to 10-20um, but it...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a gravure coating device and method thereof for preparing large-width ultra-thin metal lithium strips. The gravure coating device has a simple structure and a reasonable design, and effectively improves the coating The uniformity of the metal lithium strip can be realized automatically and continuously, which greatly improves the work efficiency and product quality, and effectively solves the problems of difficulty in preparing ultra-thin metal lithium strip, high cost and poor quality in the prior art.

Images