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Rechargeable aluminum air battery based on sunlight assistance and preparation method thereof

An aluminum-air battery, sunlight technology, applied in the direction of solar cells, electrical components, battery electrodes, etc., can solve the problem of less application of aluminum-air battery systems, and achieve the effect of saving costs, widening roads, and improving discharge current.

Pending Publication Date: 2021-11-16
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Light energy has been widely used in electrochemical devices, but less in aluminum-air battery systems

Method used

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  • Rechargeable aluminum air battery based on sunlight assistance and preparation method thereof
  • Rechargeable aluminum air battery based on sunlight assistance and preparation method thereof
  • Rechargeable aluminum air battery based on sunlight assistance and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1 grows bismuth vanadate film photoelectrode (1) preparation method on FTO conductive glass and comprises the steps:

[0027] 1) Preparation of BiOI film by electrochemical deposition method: Dissolve 20mmol of potassium iodide and 2mmol of bismuth nitrate pentahydrate in 50ml of deionized water, adjust the pH to 1.6 with dilute nitric acid, and add 20mL of 0.2M p-benzoquinone ethanol solution dropwise Add dropwise to the above solution and stir for 30min. Using Ag / AgCl as the reference electrode and Pt wire as the counter electrode, it was deposited under a bias voltage of -0.12V, then rinsed with deionized water, and dried under natural conditions.

[0028] 2) Preparation of bismuth vanadate film by calcination method: drop 0.2mL of dimethyl sulfoxide solution of vanadyl acetylacetonate with a concentration of 2M on the BiOI film, calcinate in a muffle furnace at 500°C for 2h, cool to room temperature and immerse in NaOH solution, then rinsed with deionize...

Embodiment 2

[0036] Embodiment 2 A kind of rechargeable aluminum-air battery based on sunlight auxiliary

[0037] Such as Figure 4 As shown, a rechargeable aluminum-air battery based on light-assisted structure is: the bismuth vanadate film electrode based on FTO conductive glass is used as the photoelectrode (working electrode), the aluminum sheet is used as the metal electrode, and the electrolyte is 4M sodium hydroxide solution. Performed under simulated sunlight (xenon lamp as light source).

[0038] 1) Charge and discharge performance test

[0039] Such as Figure 5 As shown, the charging voltage of the aluminum-air battery using bismuth vanadate film as the air electrode is reduced to 1.23V under simulated sunlight conditions, which is 1.5V lower than the charging voltage of about 2.73V under dark conditions, and the utilization efficiency of solar energy is about 45%. It can thus be concluded that the electrode material of the present invention has excellent photocatalytic acti...

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Abstract

The invention relates to a rechargeable aluminum air battery based on sunlight assistance and a preparation method thereof. According to the technical scheme, the method comprises the following steps: preparing an air photoelectrode: preparing a mixed solution of potassium iodide and bismuth nitrate pentahydrate, adjusting the pH value by using dilute nitric acid, dropwise adding a prepared p-benzoquinone ethanol solution into the solution, stirring, depositing BiOI on conductive glass by using an electro-deposition method, performing washing, and performing airing; finally, dropwise adding a dimethyl sulfoxide solution of vanadyl acetylacetonate onto BiOI, calcining, performing cooling to room temperature, immersing into a NaOH solution, washing with deionized water, and performing natural airing to obtain the BiVO4 photoelectrode. The material with excellent photocatalytic activity and stability is prepared, and the charging voltage can be greatly reduced by introducing sunlight. According to the invention, collaborative conversion of solar energy, chemical energy and electric energy is realized, and a new way is opened up for the rechargeable aluminum air battery.

Description

technical field [0001] The invention relates to the technical field of metal-air batteries, in particular to a solar-assisted rechargeable aluminum-air battery and a preparation method thereof. Background technique [0002] In modern society, due to the rapid consumption and shortage of fossil energy and the increasingly serious environmental problems, efficient, environmentally friendly and sustainable energy storage devices have become a hot spot pursued by researchers. At present, lithium-ion batteries (LIBs) are the most advanced and mature devices, which have the advantages of long life and high energy density, but the shortage of lithium resources, poor safety, and insufficient energy density of rechargeable lithium-ion batteries limit the lithium-ion battery. Application of ion batteries in large-scale energy storage. Metal-air batteries have attracted much attention due to their low cost, good safety, and high energy density. Among these metal-air batteries, alumin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M4/86H01M14/00C01G31/00
CPCH01M14/005H01M4/86H01M4/8825H01M4/90C01G31/00Y02E60/50
Inventor 张宇侯星杨黎妮马天翼李硕宋溪明
Owner LIAONING UNIVERSITY
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