Preparation method of polymer electrolyte membrane
A technology of electrolyte membrane and polymer, applied in solid electrolyte, non-aqueous electrolyte, circuit, etc., can solve the problem that the pore size of the electrolyte membrane is not easy to control the micropores, the shape and performance of the polymer electrolyte membrane are affected, and the performance of the electrolyte membrane is affected and other problems, to achieve excellent electrochemical performance, save the extraction process, and solve the effect of residual problems
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[0038] see figure 1 , which is a flowchart of a method for preparing a polymer electrolyte membrane according to an embodiment of the present invention. The preparation method can prepare a polymer film with a suitable pore size, uniform pore distribution, and high conductivity, including the following steps:
[0039] S1. Mix and stir polymer PVDF-HFP (polyvinylidene fluoride-hexafluoropropylene) and ACN (acetonitrile) solutions to obtain a transparent sol.
[0040] Wherein, the component of the polymer PVDF-HFP is 1g, the purity of the ACN solution is greater than 99.9%, and the component of the ACN solution is 5-7g.
[0041] S2, adding PEG (polyethylene glycol) to the transparent sol and stirring and mixing, then adding LiMNT (hectorite) to the transparent sol and stirring and mixing to obtain a yellow slurry.
[0042] Wherein, the component of the PEG is 0.2 g, and the component of the LiMNT is 0.1-0.3 g.
[0043] S4. Pouring the yellow slurry on a flat glass sheet, and p...
Embodiment 1
[0063] A method for preparing a polymer electrolyte membrane, comprising the steps of:
[0064] 1-S1. Clean and dry the transparent small glass bottle and put it in the fume hood. Weigh 1.0 g of polymer PVDF-HFP into the small glass bottle, drop 6 g of ACN solution into the small glass bottle with a rubber dropper as a solvent, and quickly cover the bottle Cover, seal the bottle cap with sealing tape, and stir magnetically at 80°C for 5h until no lumpy PVDF-HFP transparent sol appears.
[0065] 1-S2. Weigh 0.2 g of PEG and add it to the transparent sol in step 1-S1. Stir magnetically at 80°C for 0.5 h to completely dissolve the PEG. Continue to add 0.1 g LiMNT and stir magnetically at 80°C for 3 h to disperse the LiMNT. Ultrasonic treatment at 80°C for 0.5 h to prevent the agglomeration of LiMNT, and finally magnetic stirring at 80°C for 1 h to obtain a yellow slurry.
[0066] 1-S3. The yellow slurry in step 1-S2 was kept at 80° C. for 5 minutes to remove air bubbles, and a y...
Embodiment 2
[0071] A method for preparing a polymer electrolyte membrane, comprising the steps of:
[0072] 2-S1. Clean and dry the transparent small glass bottle and put it in the fume hood. Weigh 1.0 g of polymer PVDF-HFP into the small glass bottle, drop 6 g of ACN solution into the small glass bottle with a rubber dropper as a solvent, and quickly cover the bottle Cover, seal the bottle cap with sealing tape, and stir magnetically at 80°C for 5h until no lumpy PVDF-HFP transparent sol appears.
[0073] 2-S2. Weigh 0.2 g PEG and add it to the transparent sol in step 2-S1. Stir magnetically at 80°C for 0.5 h to completely dissolve the PEG. Continue to add 0.2 g LiMNT and stir magnetically at 80°C for 3 h to disperse the LiMNT. Ultrasonic treatment at 80°C for 0.5 h to prevent the agglomeration of LiMNT, and finally magnetic stirring at 80°C for 1 h to obtain a yellow slurry.
[0074] 2-S3. The yellow slurry in step 2-S2 was kept at 80° C. for 5 minutes to remove air bubbles, and a yell...
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