A kind of ceramic diaphragm and preparation method thereof
A ceramic diaphragm and inorganic nano technology, applied in the field of membrane materials, can solve problems such as explosion, combustion, and short circuit of lithium-ion batteries, and achieve the effects of simple process, improved safety performance, and easy mass production
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Embodiment 1
[0054] A lithium battery ceramic diaphragm, a lithium battery diaphragm made of nano-alumina powder as a raw material by hot pressing, the specific steps are as follows:
[0055] 1) Preparation of raw materials: dry the powdered nano-alumina, then add 10 parts of polyamide and 1 part of lignosulfonate per 100 parts by mass and stir in a sealed stirring tank at 150°C for 5 hours to make the alumina Nano powder, binder and plasticizer are thoroughly mixed;
[0056] 2) Stamping: Fill the above-mentioned uniformly mixed slurry into the mold so that the slurry fills the entire cavity of the mold, and then use a punching machine to press the slurry into a diaphragm sheet of a specific specification at 10MPa and 150°C;
[0057] 3) Cutting and trimming: Cut the stamped alumina sheet into a specific size and polish the surface. Due to the high hardness of the alumina ceramic material, it needs to be finished with a harder grinding and polishing material diamond. Coarse to fine abrasives...
Embodiment 2
[0059] A lithium battery ceramic separator, the lithium battery separator made of nano-barium sulfate powder as a raw material by hot pressing, the specific steps are as follows:
[0060] 1) Preparation of raw materials: dry the powdered nano-barium sulfate, then add 20 parts of polyamide and 2 parts of lignosulfonate per 100 parts by mass and stir in a sealed stirring tank at 160°C for 5 hours to make the barium sulfate Nano powder, binder and plasticizer are thoroughly mixed;
[0061] 2) Stamping: Fill the above-mentioned uniformly mixed slurry into the mold so that the slurry fills the entire cavity of the mold, and then use a punching machine to press the slurry into a diaphragm sheet of a specific specification at 20MPa and 160°C;
[0062] 3) Cutting and trimming: Cut the stamped barium sulfate sheet into a specific size and perform surface polishing. Due to the high hardness of the barium sulfate material, it needs to be finished with a harder grinding and polishing mate...
Embodiment 3
[0064] A lithium battery ceramic diaphragm, a lithium battery diaphragm made of nano-titanium oxide powder as a raw material by hot pressing, the specific steps are as follows:
[0065] 1) Preparation of raw materials: dry the powdered nano-titanium oxide, then add 30 parts of polyamide and 8 parts of lignosulfonate per 100 parts by mass and stir in a sealed stirring tank at 170°C for 5 hours to make the titanium oxide Nano powder, binder and plasticizer are thoroughly mixed;
[0066] 2) Stamping: Fill the above-mentioned uniformly mixed slurry into the mold so that the slurry fills the entire cavity of the mold, and then use a punching machine to press the slurry into a diaphragm sheet of a specific specification at 30MPa and 170°C;
[0067] 3) Cutting and trimming: Cut the stamped titanium oxide sheet into a specific size and polish the surface. Due to the high hardness of the titanium oxide material, a harder grinding and polishing material B is required. 4 C is used for f...
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Abstract
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