Device and method for producing large-width ultrathin metal lithium strip

Abstract

The invention discloses a device and method for producing a large-width ultrathin metal lithium strip, and belongs to the technical field of lithium metal. The device comprises a rack, a lithium material feeding device, a lithium material melting and blade coating device, a base material unwinding roller and a composite belt winding roller; the lithium material melting and blade coating device comprises a lithium material box and a blade coating lower roller, the blade coating lower roller is arranged on the rack, the lithium material box is arranged above the blade coating lower roller, a working gap allowing a base material to penetrate through is formed between the lithium material box and the blade coating lower roller, and a discharging gap allowing molten lithium liquid to flow out is formed at the bottom of the lithium material box; and the base material unwinding roller and the composite belt winding roller are arranged at the two sides of the lithium material melting and bladecoating device correspondingly. The base material on the base material unwinding roller penetrates through the working gap and then is wound around the composite belt winding roller. The lithium material feeding device is arranged above the composite belt winding roller and the lithium material box. The device is simple in structure and easy to debug, an ultrathin metal lithium strip with the thickness of 5-100 microns 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, in particular to a device and method for producing large-width ultra-thin metal lithium strips. Background technique [0002] With the rapid development of new energy vehicles and aviation drones, a high energy density material came into being - metal lithium, but at present, when metal lithium is used as the negative electrode material to match the positive electrode material, the high lithium content is not effective. To improve the energy density of lithium batteries, it is necessary to increase the energy density of lithium batteries, so ultra-thin lithium negative electrodes have become a trend. [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 needs to ...

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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 device and method for producing large-width ultra-thin metal lithium strips. The device is simple in structure, reasonable in design, easy to debug, and can realize automatic production of metal lithium strips. The work efficiency and product quality are greatly improved, and the problems of difficulty, high cost and poor quality in the preparation of ultra-thin metal lithium strips in the prior art are effectively solved

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