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Aluminum-air battery and method for recycling electrolyte of aluminum-air battery

An electrolyte recovery, aluminum-air battery technology, applied in fuel cell type half cells and primary cell type half cells, improvement of process efficiency, etc., can solve the complex process, high cost, difficult recovery of failed electrolyte, etc. problems, to avoid environmental pollution, easy to operate, and improve the effect of resource reuse.

Active Publication Date: 2019-10-25
ZHEJIANG GEELY HLDG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for recycling the electrolyte of an aluminum-air battery, so as to overcome the technical problems of the prior art such as difficulty in recovering the invalid electrolyte of the aluminum-air battery, high cost and complicated process.

Method used

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  • Aluminum-air battery and method for recycling electrolyte of aluminum-air battery
  • Aluminum-air battery and method for recycling electrolyte of aluminum-air battery
  • Aluminum-air battery and method for recycling electrolyte of aluminum-air battery

Examples

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Effect test

Embodiment 1

[0064] Collect the spent electrolyte solution containing dissolved aluminum and aluminum hydroxide into the gravity sedimentation tank, clean the aluminum-air battery with water and inject the cleaning solution together. The volume ratio of the spent electrolyte solution and the cleaning solution is 1:1. Set aside for 2 days, after the aluminum hydroxide precipitate phase is separated from the solution phase, use a pump to roughly filter the supernatant containing dissolved aluminum and inject it into the seed crystal chamber, stir slowly and add aluminum hydroxide crystal seeds, and control the temperature at 30 °C , the stirring speed is 50r / min, and the stirring time is 6 days. Afterwards, centrifuge to obtain the sediment in the seed chamber, put it together with the sediment in the lower layer of the gravity settling tank, wash it repeatedly with deionized water until it is neutral, and dry it at 60°C for 9 hours to obtain alumina powder. Put the alumina powder in a muffl...

Embodiment 2

[0066] Collect the spent electrolyte solution containing dissolved aluminum and aluminum hydroxide into the gravity sedimentation tank, clean the aluminum-air battery with water and inject the cleaning solution together, the volume ratio of the spent electrolyte solution and the cleaning solution is 1:2, cool at 10°C Set aside for 1 day, after the aluminum hydroxide precipitate phase is separated from the solution phase, use a pump to roughly filter the supernatant containing dissolved aluminum and inject it into the seed crystal chamber, stir and pass in excess CO 2 , the control temperature is 15°C, the stirring speed is 200r / min, and the stirring time is 3 days. Afterwards, centrifuge to obtain the sediment in the seed chamber, put it together with the sediment in the lower layer of the gravity settling tank, wash it repeatedly with deionized water until it is neutral, and dry it at 80°C for 5 hours to obtain alumina powder. Put the alumina powder in a muffle furnace and bu...

Embodiment 3

[0068] Collect the spent electrolyte solution containing dissolved aluminum and aluminum hydroxide into the gravity sedimentation tank, clean the aluminum-air battery with water and inject the cleaning solution together, the volume ratio of the spent electrolyte solution and the cleaning solution is 1:2.5, cool at 0°C Set aside for 0.5 days, after the aluminum hydroxide precipitate phase is separated from the solution phase, use a pump to roughly filter the supernatant liquid containing dissolved aluminum and inject it into the seed crystal chamber, stir and add aluminum chloride seed crystals, control the temperature at 15°C, The stirring speed is 100r / min, and the stirring time is 6 days. Afterwards, centrifuge to obtain the sediment in the seed chamber, put it together with the sediment in the lower layer of the gravity settling tank, wash it repeatedly with deionized water until it is neutral, and dry it at 60°C for 3 hours to obtain alumina powder. Put the alumina powder ...

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Abstract

The invention discloses a method for recycling an electrolyte of an aluminum-air battery. The method comprises the steps of: diluting a failed electrolyte, performing cooling, standing and layering, collecting a lower-layer precipitate, adding one or more than one seed crystals into the lower-layer precipitate for crystallization to promote most of dissolved aluminum to precipitate, performing centrifuging, drying, firing to obtain alumina, and electrolyzing the alumina to obtain pure aluminum, wherein the separated supernatant can be added with an electrolyte for repeated use. The invention also discloses an aluminum-air battery with the novel electrolyte prepared by the method. Compared with the prior art, the method can effectively remove the aluminum hydroxide precipitate and most of dissolved aluminum in the electrolyte, and does not introduce impurity phases, so that the centrifuged solution can be used as the electrolyte again after the electrolyte is added, and the resource utilization rate is improved. The method is safe, effective, easy to operate, capable of being performed in a fully-closed environment, capable of purifying the working environment, capable of effectively avoiding environmental pollution, low in requirement on equipment and suitable for large-scale industrialization.

Description

technical field [0001] The invention relates to the technical field of aluminum-air batteries, in particular to an aluminum-air battery and a method for recycling its electrolyte. Background technique [0002] As a renewable, clean and efficient green new energy, aluminum-air batteries have high specific energy, high reliability, long service life, low cost, and environmental protection compared with traditional lead-acid batteries, nickel-metal hydride batteries and lithium-ion batteries. Poisonous, safe storage and transportation, and flexible application, it has become an ideal form of energy storage in applications such as mobile base stations, portable power supplies, and electric vehicle energy. [0003] However, with the rapid development of this technology in recent years, the effective treatment and recycling of the expired waste electrolyte has not been paid attention to, and the recycling process is lacking, and the recycling channels are not smooth. Therefore, i...

Claims

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Application Information

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IPC IPC(8): H01M12/06C25C3/06C22B7/00
CPCC22B7/00C25C3/06H01M12/06Y02P10/20
Inventor 高倩杜尚毅
Owner ZHEJIANG GEELY HLDG GRP CO LTD
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