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.
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[0063] Example 1
[0064] Collect the spent electrolyte containing dissolved aluminum and aluminum hydroxide in a gravity sedimentation tank, wash the aluminum-air battery with water and inject the cleaning solution together. The volume ratio of the spent electrolyte to the cleaning solution is 1:1, and cool down at 15°C. Leave for 2 days, after the aluminum hydroxide precipitation phase is separated from the solution phase, use a pump to roughly filter the supernatant containing dissolved aluminum and inject it into the seed chamber, stir slowly and add aluminum hydroxide seed crystals, and control the temperature to 30°C , The stirring speed is 50r / min, and the stirring time is 6 days. Afterwards, centrifugation to obtain the sediment of the seed chamber, and put it together with the sediment in the lower layer of the gravity sedimentation tank, repeatedly wash with deionized water until it is neutral, and dry at 60°C for 9 hours to obtain alumina powder. The alumina powder is...
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[0065] Example 2
[0066] Collect the spent electrolyte containing dissolved aluminum and aluminum hydroxide in a gravity sedimentation tank, wash the aluminum-air battery with water and inject the cleaning solution together, the volume ratio of the spent electrolyte to the cleaning solution is 1:2, and cool down at 10℃. Set aside for 1 day, after the aluminum hydroxide precipitation phase is separated from the solution phase, the supernatant containing dissolved aluminum is roughly filtered by a pump and then injected into the seed crystal chamber, stirred and passed in excess CO 2 , The control temperature is 15℃, the stirring speed is 200r / min, and the stirring time is 3 days. Afterwards, centrifugation to obtain the precipitation of the seed chamber, and put it together with the sediment of the lower layer of the gravity sedimentation tank, repeatedly wash with deionized water until it is neutral, and dry at 80°C for 5 hours to obtain alumina powder. Put the alumina powder in...
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[0067] Example 3
[0068] Collect the spent electrolyte containing dissolved aluminum and aluminum hydroxide in the gravity sedimentation tank, wash the aluminum-air battery with water and inject the cleaning solution together, the volume ratio of the spent electrolyte to the cleaning solution is 1:2.5, and cool down at 0℃. Leave it for 0.5 days, after the aluminum hydroxide precipitation phase is separated from the solution phase, use a pump to roughly filter the supernatant containing dissolved aluminum and inject it into the seed chamber, stir and add aluminum chloride seed crystals, and control the temperature to 15°C. The stirring speed is 100r / min, and the stirring time is 6 days. Afterwards, centrifugation to obtain the precipitation of the seed chamber, and put it together with the precipitation of the lower layer of the gravity sedimentation tank, repeatedly wash with deionized water until it is neutral, and dry at 60°C for 3 hours to obtain alumina powder. Place the al...
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