Lithium air battery gel air positive electrode, preparation method and lithium air battery

A lithium-air battery and air positive electrode technology, applied in battery electrodes, fuel cell half-cells, secondary battery-type half-cells, circuits, etc., can solve the problems of long time, low ion conductivity, complex design, etc. problems, to achieve the effects of easy industrial production, simple preparation method, and reduced polarization increase
CN114695901APending Publication Date: 2022-07-01BEIJING WELION NEW ENERGY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING WELION NEW ENERGY TECH CO LTD
Publication Date
2022-07-01

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Abstract

The invention relates to a lithium air battery gel air positive electrode, a preparation method and a lithium air battery, the lithium air battery gel air positive electrode comprises a current collector, the surface of the current collector is provided with a porous conductive material coating, and the porous conductive material coating comprises a porous conductive material. The outer surface of the porous conductive material is coated with a polymer gel layer, and electrolyte is completely locked in the polymer gel layer through the polymer gel layer, so that volatilization of the electrolyte is inhibited, side reaction between a discharge product and the porous conductive material is effectively isolated, polarization increase caused by the side product is reduced, and the service life of the porous conductive material is prolonged. The energy efficiency of the lithium-air battery is improved, and the cycle life of the lithium-air battery is prolonged.
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Description

technical field

[0001] The invention belongs to the technical field of lithium-air secondary batteries, and particularly relates to a lithium-air battery gel-air positive electrode, a preparation method and a lithium-air battery. Background technique

[0002] Lithium-air battery is a new type of battery system with higher energy density than commercial lithium-ion battery. It mainly uses metal lithium as the negative electrode and oxygen as the air positive electrode. Using the reversible reaction between lithium and oxygen, it can reach 3500Wh / kg. The theoretical energy density is 10 times that of the existing lithium-ion battery system. Moreover, the lithium-air battery uses oxygen as the main working gas, which is environmentally friendly and easy to obtain, does not need to be stored in the battery, and is lighter in weight. The negative electrode and the air positive electrode of the lithium-air battery are usually infiltrated in the organic electrolyte. The positive a...

Claims

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