Photo-assisted wide-temperature solid-state lithium air battery and preparation method thereof

An air battery and solid-state lithium technology, applied in fuel cells, battery electrodes, fuel cell-type half-cells and primary battery-type half-cells, etc. problems, to avoid side reactions, promote reaction kinetics, and reduce interface impedance

Pending Publication Date: 2022-04-08
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in an open system, factors such as volatilization, leakage, flammability, and instability of the organic electrolyte in the lithium-air battery affect the stable and safe operation of the battery.
In addition, the operation under extreme ambient temperature conditions poses more severe challenges to lithium-air batteries

Method used

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  • Photo-assisted wide-temperature solid-state lithium air battery and preparation method thereof
  • Photo-assisted wide-temperature solid-state lithium air battery and preparation method thereof
  • Photo-assisted wide-temperature solid-state lithium air battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Preparation of Au@TiO 2 Photocathode:

[0085] 1. Take 0.4175mL of ammonia water, 0.91mL of water, and 5mL of isopropyl titanate and quickly add them to a mixed solution of 150mL of ethanol and 100mL of acetonitrile, stir at a constant speed for 6 hours, centrifuge, and dry to obtain a white powder;

[0086] 2. Dissolve 1.5g of the obtained white powder in 30mL of water, add 0.1167g of ammonium fluoride and 0.15g of polyvinylpyrrolidone (molecular weight 10K) in sequence, transfer to the reaction kettle, store at 110°C for 4 hours, and add 0.36mL of three Ethylamine and 2.25mL acetic acid, stirred evenly, transferred to the reaction kettle, kept at 85°C for 24h, centrifuged, washed with 1mM sodium hydroxide, washed with water and dried to obtain a white sea urchin-shaped spherical shell titanium dioxide powder;

[0087] 3. Disperse 1.5 g of sea urchin-shaped spherical shell titanium dioxide white powder in 50 mL of aqueous solution, add 1 mL of 1 mM chloroauric acid so...

Embodiment 2

[0098] Preparation of the integrated double-layer ATLL frame:

[0099] 1. Dissolve 0.78g of germanium oxide in 5mL of ammonia water (content 25%) and stir at 60°C to form a homogeneous solution; according to Li3 AlGe 3 (PO 4 ) 6 The lithium carbonate (excessive 10%) that the stoichiometric ratio of equation drops into, aluminum nitrate nonahydrate, ammonium dihydrogen phosphate are dissolved in 175mL 0.2M citric acid aqueous solution, form homogeneous solution;

[0100] 2. Mix the two solutions and add 2mL of ethylene glycol to form a sol-gel at 90°C. The gel was stored at 170°C for 24 hours to obtain.

[0101] 3. Anneal the obtained brown powder at 500°C and 900°C for 6 hours to obtain white powder LAGP;

[0102] 3. Grind LAGP and starch at a weight ratio of 2:1, add the mixed powder and pure LAGP powder in sequence, spread out layer by layer in the mold, and pressurize at 30MPa for 6 minutes. Annealed at 900 °C to obtain a bilayer integrated LAGP framework. ;

[0103]...

Embodiment 3

[0114] Preparation of light-assisted wide-temperature solid-state lithium-air batteries:

[0115] From top to bottom, the positive electrode current collector with a diameter of 10mm window, the integrated double-layer ATLL frame, and the negative electrode lithium sheet are assembled in the 2025 battery. The light-assisted wide-temperature solid-state lithium-air battery was subjected to xenon lamp irradiation tests at room temperature, dry ice, and an oven (150 degrees Celsius).

[0116] The light-assisted wide-temperature solid-state lithium-air battery prepared in Example 3 of the present invention was characterized.

[0117] see Figure 7 , Figure 7 The first charge and discharge voltage curve of the light-assisted solid-state lithium-air battery prepared for the present invention at room temperature.

[0118] Depend on Figure 7 It can be seen that under light conditions, the light-assisted solid-state lithium-air battery can achieve an ultra-low polarization of 0.2...

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Abstract

The invention is applicable to the technical field of metal-air batteries, and provides a photo-assisted wide-temperature solid-state lithium-air battery which comprises a lithium negative electrode, a compact solid-state electrolyte layer and a multifunctional photo-positive electrode with a porous solid-state electrolyte layer carrying a photocatalyst, the thickness of the compact solid-state electrolyte layer can be adjusted to be 100 microns, and the thickness of the porous solid-state electrolyte layer can be adjusted to be 100 microns. The compact solid electrolyte layer and the porous solid electrolyte layer form an integrated frame which can support various photo-anode catalysts. According to the invention, the photocatalytic positive electrode can absorb and utilize full-spectrum light energy and effectively convert the light energy into various forms of energy such as electric energy and heat energy; the integrated framework ensures that Li < + > and heat are quickly transferred in the whole lithium air battery; the porous integrated framework loaded with the photocatalyst can expose more reaction sites for a positive electrode catalytic reaction, so that an effective transmission path of lithium ions and electrons is ensured, and light absorption and light utilization are enhanced through a space structure.

Description

technical field [0001] The invention belongs to the technical field of metal-air batteries, and in particular relates to a light-assisted wide-temperature solid-state lithium-air battery and a preparation method thereof. Background technique [0002] In order to achieve the ambitious goals of carbon neutrality and carbon peaking, clean secondary batteries with high energy density have become one of the key directions of research. Among many emerging systems, lithium-air batteries have attracted extensive attention from researchers due to their ultra-high theoretical energy density. Lithium-air batteries use continuous oxygen in the air as the positive electrode active material, metal lithium as the negative electrode, and the two are separated by an infiltrating electrolyte or a solid electrolyte. Based on the equation The theoretical energy density of lithium-air batteries can reach 3860mAh / g. However, due to the stability and insulating properties of the discharge pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/06H01M8/1246H01M4/90H01M4/88
CPCY02E60/50
Inventor 徐吉静管德慧王晓雪
Owner JILIN UNIV
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