Graphene-based quasi-solid battery based on printing technology

Abstract

The invention relates to a graphene-based quasi-solid battery based on a printing technology, and belongs to the technical field of a chemical power supply. The graphene-based quasi-solid battery based on the printing technology is characterized in that positive electrode ink is prepared from a functional graphene material, a positive electrode is obtained through printing on a positive electrode current collector by an ink printing method, a solid electrolyte film is obtained by a coating method, a negative electrode material is pressed on a negative electrode current collector to obtain a negative electrode, a surface of the positive electrode is coated with a liquid-state electrolyte, and the quasi-solid battery is obtained by combining the solid electrolyte film and the negative electrode. On the basis of high safety, the battery has rapid charge-discharge performance; moreover, patterned battery fabrication can be performed by a printing mode, the graphene-based quasi-solid battery has the advantages of high thickness controllability, low material waste and the like, and patterning preparation can be achieved.

Description

technical field [0001] The invention belongs to the technical field of chemical power sources, in particular to a graphene-based solid-state battery based on printing technology. Background technique [0002] 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 any reason, the energy in the battery will be released in the form of heat in a short time. Come out, ignite these ethers as solvents, and cause an explosion. The solid-state lithium battery that replaces the organic electrolyte with a solid electrolyte is expected to solve the safety problem of the battery while solving the two key problems of low capacity and short service life of the traditional lithium-ion battery. Therefore, the traditional liquid organic electrolyte is replaced with a solid electrolyte. Solid-state lithium batteries with electrolytes are attracting more...

AI Technical Summary

Problems solved by technology

[0004] In terms of battery manufacturing process, conventional lithium-ion batteries currently mainly use the coating method to make electrodes. Due to equipment and process limitations, it is difficult to further reduce the coating thickness of the electrode layer, and the shape of the battery is uncontrollable, making it difficult to integrate with devices with complex shapes.

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