Preparation methods of three electrolyte membranes for polymer batteries

The preparation methods of three electrolyte membranes for polymer batteries are analyzed in detail. Background technology: Lithium batteries have the advantages of long cycle life, high specific energy, and good stability. However, the safety and electrochemical performance of lithium batteries have always been important factors restricting their further development. At present, the safety and electrochemical performance of liquid lithium batteries are not satisfactory. Technical realization elements: In view of this, the present invention provides a polymer electrolyte membrane for lithium batteries and a preparation method thereof. In order to achieve the above objective, the present invention adopts the following technical methods: the lithium battery polymer electrolyte membrane is a gel polymer electrolyte membrane, and the gel polymer electrolyte membrane includes a polymer matrix, a lithium salt and a plasticizer. The mass ratio of polymer matrix, lithium salt and plasticizer is 17~68:3~12:10~40. The plasticizer is one or more of diethyl carbonate, polyhydroxybutyrolactone, butyl phthalate, methyl ethyl carbonate, diethyl carbonate, polyethylene glycol, polyethylene glycol dimethyl ether , Ethyl carbonate, dibutyl titanate. A method for preparing a polymer electrolyte membrane for a lithium battery includes the following steps: dissolving a lithium salt in a solvent, and then adding a polymer matrix to form a mixed solution. The plasticizer is dissolved in the mixed solution to obtain an intermediate solution. The intermediate solution adopts a solution casting method and is dried to obtain a polymer electrolyte membrane. The advantages of the invention: the lithium battery polymer electrolyte membrane prepared by the invention has the characteristics of high safety, good electrochemical performance and the like. Instant flow method: connect the cylinder filled with inert gas to the mud charging tank, control the outflow rate of the mud by adjusting the air pressure, drive the mud through the slit between the top and the substrate and a constant motion matrix to form a unified film, dry it through Dry the tunnel and then roll it up. 2. Pouring method: use glass as the film carrier, slot the glass, and inject the slurry to form a thin film layer of uniform thickness. After drying, a polymer film is obtained. 3. Screen printing method: densely woven screen spreads horizontally, smooth and clean metal plates, scrape the mud with a scraper, and form a unified film under a certain pressure. After drying, the thickness of the film is determined by the viscosity of the mud and the mesh. , Scraper pressure and speed. A method for preparing a polymer electrolyte membrane for a lithium battery includes the following steps: dissolving a lithium salt in a solvent, and then adding a polymer matrix to form a mixed solution. The plasticizer is dissolved in the mixed solution to obtain an intermediate solution. The intermediate solution adopts a solution casting method and is dried to obtain a polymer electrolyte membrane. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.