All-solid-state lithium air battery and manufacturing method therefor

Abstract

The invention relates to the field of a lithium air battery, and in particular to an all-solid-state lithium air battery and a manufacturing method therefor. The all-solid-state lithium air battery comprises a positive electrode layer, an electrolyte layer and a negative electrode layer; and the positive electrode layer is the structural supporting layer. The invention adopts a solid phase reaction method to prepare the all-solid-state lithium air battery; a conventional tape casting process and a film replication technology are adopted; a positive electrode diaphragm, a negative electrode diaphragm and an electrolyte diaphragm that are folded are pressed into an overall body at the temperature of 60-80 DEG C and at the pressure of 4,000-7,000 PSI, and finally the all-solid-state lithium air battery consisting of the positive electrode layer, the electrolyte layer and the negative electrode layer is obtained through a co-sintering step. According to the all-solid-state lithium air battery, the interface contact resistance between the electrode and the electrolyte is effectively eliminated or lowered, and the all-solid-state lithium air battery is excellent in performance.

Description

technical field [0001] The invention relates to the field of lithium-air batteries, in particular to an all-solid-state lithium-air battery and a manufacturing method thereof. Background technique [0002] With the development of society, energy and environmental issues are becoming more and more prominent, and the resulting international problems are also increasing, which poses a certain crisis to social stability and security. People began to pay attention to the use of renewable energy such as solar energy, wind energy, and tidal energy, but renewable energy is more or less limited by natural conditions, or produces some unnecessary secondary pollution, so the chemical energy storage and transmission Power has received unprecedented attention from society. [0003] Due to the advantages of large capacity and long life, lithium batteries are expected to replace gasoline as the power source of power vehicles. However, due to the limitation of positive electrode materials,...

AI Technical Summary

Problems solved by technology

All-solid-state lithium-air batteries do not have the problem of liquid leakage, and their safety has been improved. However, the contact between the solid-state electrolyte and the lithium negative electrode, the air electrode, and the interior of the solid-state electrolyte will not be as close as that of the liquid electrolyte, which may increase the internal resistance of the battery.

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