Aqueous coating for separator of lithium ion battery, preparation method and application thereof
A lithium-ion battery and water-based coating technology, which is applied to secondary batteries, battery pack components, separators/films/diaphragms/spacer components, etc., to improve cycle performance and avoid separation
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[0025] Example 1
[0026] A water-based coating for lithium-ion battery separators, the raw materials of which include the following components in parts by mass: 80 parts of water-based PVDF powder SOLVAY 21216, 3 parts of polymethyl methacrylate binder, surfactant fluoroalkyl 3 parts of methoxy ether alcohol, 6 parts of dispersant carboxymethyl cellulose, 0.3 part of photosensitizer benzophenone, 0.4 part of emulsifier Tween20.
[0027] The above-mentioned lithium-ion battery diaphragm water-based coating and the preparation method of the lithium-ion battery diaphragm comprising the coating, the specific steps are as follows:
[0028] 1) According to the ratio of raw materials described in this example, add fluoroalkyl methoxy ether alcohol and carboxymethyl cellulose into deionized water, and stir rapidly for 20 minutes to obtain a mixed solution;
[0029] 2) Add benzophenone, polymethyl methacrylate adhesive, and water-based PVDF powder SOLVAY21216 to the mixed solution to...
Example Embodiment
[0032] Example 2
[0033] A water-based coating for lithium-ion battery separators, the raw materials of which include the following components in parts by mass: 90 parts of water-based PVDF powder ArKema 761A, 5 parts of polyethyl methacrylate binder, surfactant fluoroalkyl 4 parts of ethoxy ether alcohol, 15 parts of dispersant hydroxypropyl methylcellulose, 0.4 part of photosensitizer diphenyl ethyl ketone, 0.3 part of emulsifier Tween80.
[0034] The above-mentioned lithium-ion battery diaphragm water-based coating and the preparation method of the lithium-ion battery diaphragm comprising the coating, the specific steps are as follows:
[0035] 1) According to the ratio of raw materials described in this example, add fluoroalkyl ethoxy ether alcohol and hydroxypropyl methylcellulose into deionized water, and stir rapidly for 25 minutes to obtain a mixed solution;
[0036] 2) Add diphenyl ethyl ketone, polyethyl methacrylate adhesive, and water-based PVDF powder ArKema 761...
Example Embodiment
[0038] Example 3
[0039] A water-based coating for lithium-ion battery separators, the raw materials of which include the following components in parts by mass: 85 parts of water-based PVDF powder SOLVAY8808, 7 parts of polymethyl methacrylate binder, surfactant polyoxyethylene alkyl 6 parts of amide, 15 parts of dispersant carboxymethyl cellulose, 0.5 part of photosensitizer benzophenone, 0.3 part of emulsifier sodium polyacrylate.
[0040] The above-mentioned lithium-ion battery diaphragm water-based coating and the preparation method of the lithium-ion battery diaphragm comprising the coating, the specific steps are as follows:
[0041] 1) Add polyoxyethylene alkylamide and carboxymethyl cellulose to deionized water, and stir rapidly for 30 minutes to obtain a mixed solution;
[0042]2) Add benzophenone, polymethyl methacrylate adhesive, and water-based PVDF powder SOLVAY8808 to the mixed solution obtained in step 1) to form a mixed solution with a solid content of 10%, a...
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