Preparation method of lithium-air battery based on gel electrolyte-lithium negative electrode integrated structure

Abstract

The invention belongs to the technical field of lithium battery devices, and relates to a preparation method of a lithium-air battery based on a gel electrolyte-lithium negative electrode integrated structure. The prepared lithium-air battery comprises a flexible porous metal sheet, two lithium sheets, two positive electrodes and a gel electrolyte, wherein a tab is welded on the flexible porous metal sheet to form a negative electrode current collector; the flexible porous metal sheet is located between the two lithium sheets, the two lithium sheets are implanted to form a composite lithium negative electrode, the gel electrolyte wraps the composite lithium negative electrode to form a gel electrolyte-lithium negative electrode integrated structure, and the positive electrode and the gel electrolyte-lithium negative electrode integrated structure are assembled into the lithium-air battery. The problems that the lithium negative electrode of the flexible lithium-air battery is easy to break due to fatigue, potential safety hazards exist when the lithium negative electrode is exposed to air, electrolyte and the lithium negative electrode cannot be in full contact and are easy to separate in the bending process are solved.

Description

technical field [0001] The invention belongs to the technical field of lithium battery devices, and in particular relates to a preparation method of a lithium-air battery based on a gel electrolyte-lithium negative electrode integrated structure. Background technique [0002] In recent years, with the rapid development of flexible wearable devices, lithium-air batteries have attracted widespread attention due to their very high theoretical energy density (3600Wh / kg, 5-10 times that of traditional lithium-ion batteries). A lithium-air battery consists of a lithium negative electrode, an electrolyte / electrolyte, and a catalytic positive electrode. [0003] At present, most lithium-air batteries remain in the stage of "lithium-oxygen" batteries and cannot be used normally in the air. However, flexible lithium-air batteries face more problems: 1) The working principle of lithium-air batteries determines that lithium-air batteries must be in contact with the outside world. 2) Li...

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Problems solved by technology

[0004] Aiming at the problems that the lithium negative electrode of the flexible lithium-air battery is fatigued and easy to break, there are potential safety hazards when exposed to the air, the electrolyte and the lithium negative electrode cannot be fully contacted, and they are easy to separate during the bending process, the present invention develops a gel electrolyte-lithium negative electrode integrated Structured lithium-air battery and its preparation method solve the safety problem of flexible lithium battery and lay the foundation for the application of flexible battery devices

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