Preparation method of lithium air battery

Abstract

The invention discloses a preparation method of a lithium air battery. The method comprises the following steps of: 1) mixing Al203, Li2O, GeO2 and P2O5, melting, grinding and sintering to obtain powder; 2) mixing acetylene black, the powder and a polymer medium into the water, coating on the two sides of a nickel base material, clamping the nickel base material between two stainless steel plates, pressing, drying and sintering under a protective atmosphere to obtain an air anode; 3) mixing Al203, Li2O, GeO2 and P2O5, melting, grinding and sintering to obtain a first thin film; 4) mixing lithium salt electrolyte, boron nitride and polyoxyethylene, ball-milling and hot-pressing to obtain a second thin film; 5) mixing Li2O, boron nitride and polyoxyethylene, ball-milling and hot-pressing to obtain a third thin film; 6) clamping the first thin film between the second thin film and the third thin film to obtain solid electrolyte; 7) connecting the air anode with the second thin film of the solid electrolyte; 8) coating a layer of aluminium foil on the cathode of lithium metal, and connecting the cathode of the lithium metal with the third thin film of the solid electrolyte; and 9) assembling a battery case, a seal ring and a waterproof breathable film. According to the invention, the air battery prepared by the method has better circulation charge-discharge performance.

Description

technical field [0001] The invention relates to a preparation method of a lithium-air battery. Background technique [0002] With the increasing consumption of fossil energy and the increasing demand for energy, the research and development of new energy materials is imminent. Electric energy has been popularized and used as early as the last century, and batteries are one of the common tools for using electric energy. Lithium-ion batteries are widely researched and used now. Due to the advantages of high energy density, long service life, low self-discharge rate and no memory effect of lithium-ion batteries, lithium-ion batteries are attracting the attention of scientists all over the world. However, the current commercial lithium-ion batteries are mainly based on LiCoO 2 Due to the rocking chair mechanism of lithium-ion intercalation compounds, the positive electrode material becomes the limit of the energy density of lithium-ion batteries, and the limit energy density c...

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Problems solved by technology

Another example is that traditional lithium-ion batteries use organic electrolytes, and the surface tension will cause the lipophilic air electrodes to be submerged in the electrolyte, which is not conducive to the formation of diffusion electrodes, resulting in insufficient oxygen supply during discharge and reduced battery cycle performance.

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