High-stability lithium ion battery diaphragm
A lithium-ion battery, high-stability technology, used in secondary batteries, battery pack components, circuits, etc., can solve problems such as poor liquid absorption performance, low ionic conductivity, and unstable heat, so as to avoid heat The effect of instability, simple synthesis steps and low cost
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Embodiment 1
[0019]A high-stability lithium-ion battery separator specifically includes the following preparation steps:
[0020](1) Pretreatment of bamboo fiber: Put 10 parts of cut bamboo fiber into 10wt% sodium hydroxide solution, boil for 60min, cool naturally, filter with suction, wash with water until it is neutral, and put it in 160℃ after drying Boil in 60 parts of N,N-dimethylacetamide solution of acetamide for 30 minutes, then stir at 150°C for 30 minutes, then reflux at 100°C for 4 hours, magnetically stir the cooled solution at room temperature until the bamboo fibers are dissolved;
[0021](2) Dissolve 30 parts of polyvinylidene fluoride and poly(p-phenylene benzodiazole) in 60 parts of N,N-dimethylformamide and acetone mixed solvent, heat to 85°C, magnetically stir for 5 hours, and then put into the oven Dry at 80℃ for 12h;
[0022](3) Add 5 parts of ammonium fluoride to the solution of step (1), magnetically stir for 1h, then add the product of step (2), continue stirring for 12h, then pla...
Embodiment 2
[0025]A high-stability lithium-ion battery separator specifically includes the following preparation steps:
[0026](1) Pretreatment of bamboo fiber: Put 5 parts of cut bamboo fiber into 10wt% sodium hydroxide solution, boil for 60min, cool naturally, filter with suction, wash with water until it is neutral, and put it in 160℃ after drying Boil in 50 parts of N,N-dimethylacetamide solution for 30 minutes, then stir at 150°C for 30 minutes, then reflux at 80°C for 3 hours, magnetically stir the cooled solution at room temperature until the bamboo fibers are dissolved;
[0027](2) Dissolve 20 parts of polyvinylidene fluoride and poly(p-phenylene benzodiazole) in 50 parts of N,N-dimethylformamide and acetone mixed solvent, heat to 85°C, magnetically stir for 5 hours, and then put it into the oven Dry at 80℃ for 12h;
[0028](3) Add 10 parts of ammonium fluoride to the solution of step (1), magnetically stir for 1h, then add the product of step (2), continue stirring for 12h, then place it in a ...
Embodiment 3
[0031]A high-stability lithium-ion battery separator specifically includes the following preparation steps:
[0032](1) Pretreatment of bamboo fiber: Put 8 parts of cut bamboo fiber into 10wt% sodium hydroxide solution, boil for 60min, cool naturally, filter with suction, wash with water until it is neutral, and put it in 160℃ after drying Boil in 55 parts of N,N-dimethylacetamide solution for 30 minutes, then stir at 150°C for 30 minutes, then reflux at 120°C for 5 hours, magnetically stir the cooled solution at room temperature until the bamboo fibers are dissolved;
[0033](2) Dissolve 40 parts of polyvinylidene fluoride and poly(p-phenylene benzodiazole) in 55 parts of N,N-dimethylformamide and acetone mixed solvent, heat to 85°C, magnetically stir for 5 hours, and then put it into the oven Dry at 80℃ for 12h;
[0034](3) Add 8 parts of ammonium fluoride to the solution of step (1), magnetically stir for 1h, then add the product of step (2), continue stirring for 12h, then place it in a ...
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