Preparation method of all-solid-state battery employing lithium metal as negative electrode

Abstract

The invention discloses a preparation method of an all-solid-state battery employing a lithium metal as a negative electrode. The method is characterized by comprising the following steps: (101) pressing the lithium metal on a current collector in the preparation process of an all-solid-state battery core; (102) coating the surface of the lithium metal with a negative material thin layer; and (103) finishing pressing and molding of a solid electrolyte and a composite positive material and preparation of the all-solid-state battery core. Negative material thin layer coating is carried out on the surface of the negative electrode of the lithium metal; and the lithium metal and the solid electrolyte material are physically isolated, so that the solid electrolyte material is prevented from directly contacting the lithium metal for reaction. With the painted negative material thin layer as a transitional material, the all-solid-state battery has electronic conductivity, and meanwhile, shuttling of lithium ions in the charge-discharge cycle process of the all-solid-state battery is not hindered.

Description

technical field [0001] The invention belongs to the technical field of all-solid-state batteries, and the all-solid-state battery refers to a new type of battery that uses a solid electrolyte to replace the organic liquid electrolyte in the existing lithium battery. In particular, the present invention relates to a preparation method of an all-solid-state battery using metallic lithium as a negative electrode Background technique [0002] Driven by strong social development demands and a huge potential market, new chemical energy storage systems based on new concepts, new materials and new technologies are constantly emerging, and chemical energy storage technologies are moving toward safe, reliable, long-life, large-scale, low-cost, Development in the direction of pollution-free. At present, in lithium-ion batteries, due to the large amount of flammable organic electrolytes such as esters and ethers, there are serious safety hazards. When the battery is short-circuited for...

AI Technical Summary

Problems solved by technology

The preparation method of the all-solid-state battery solves the problem that the solid electrolyte material of the all-solid-state battery and metal lithium are unstable, so that metal lithium cannot be directly used as the negative electrode material, and provides a simple and easy-to-operate method that reduces the impact of the all-solid-state battery on the electrolyte material. requirements, so that metal lithium can be directly used as the negative electrode material of all-solid-state batteries, which improves the working voltage of all-solid-state batteries and effectively improves the specific energy of all-solid-state batteries

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