Method for testing content of magnetic substances in lithium ion battery anode material
A technology of lithium-ion batteries and magnetic substances, which is applied in the field of testing the content of magnetic substances in the positive electrode materials of lithium-ion batteries, can solve the problems of poor applicability and low detection accuracy, and achieve the effect of high accuracy
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[0029] Example 1
[0030] Weigh 100g of lithium-ion battery cathode material (a sample of lithium iron phosphate) into a high-temperature resistant plastic bottle, inject 100g of absolute ethanol, seal it with a lid, and place the bottle in an ultrasonic disperser for 60 min.
[0031] Add a magnet to the bottle, continue to sonicate for 30 minutes, take out the magnet and put it into a clean beaker containing ethanol solution. After sonicating for 10 minutes, replace the ethanol solution in the beaker and repeat this step until the ethanol solution in the beaker is colorless after sonication , And no suspended matter.
[0032] Take out the magnet, put it in a clean beaker, add 20ml of nitric acid solution and 10ml of hydrochloric acid solution. As for heating to a slight boiling on the electric furnace, keep it for 15 minutes until the magnetic substance on the magnet is completely dissolved. Rinse the magnet with deionized water until it dissolves. in. Filter the dissolved solutio...
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[0034] Example 2
[0035] Weigh 100g of lithium-ion battery cathode material (a sample of lithium cobaltate) into a high-temperature resistant plastic bottle, inject 100g of isopropanol, seal it with a lid, and place the bottle in an ultrasonic disperser for 30 minutes of ultrasound.
[0036] Add a magnet to the bottle, continue to sonicate for 40 minutes, take out the magnet and put it into a clean beaker containing isopropanol solution. After sonicating for 10 minutes, replace the isopropanol solution in the beaker. Repeat this step until there is nothing in the beaker after sonication. The propanol solution is colorless and has no suspended matter.
[0037] Take out the magnet, put it in a clean beaker, add 15ml of nitric acid solution and 10ml of hydrochloric acid solution. As for heating to a slight boiling on the electric furnace, keep it for 20 minutes until the magnetic substance on the magnet is completely dissolved. Rinse the magnet with deionized water until it dissolves. ...
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