A preparation method of an all-solid polymer electrolyte membrane containing biological materials

Abstract

The invention discloses a method for preparing an all-solid polymer electrolyte membrane containing biological materials, and relates to a method for preparing an electrolyte membrane for a lithium ion battery. Specifically, starch, phthalic anhydride, pyridine and solvent are mixed according to a certain ratio, blended and stirred in a water bath at 80°C for 3 to 4 hours, and then starch phthalate is precipitated with isopropanol. Then dry in a vacuum oven for 24 hours, and finally grind the starch phthalate into powder with a mortar for use. Then weigh the polyvinylidene fluoride, modified starch, lithium salt and solvent, blend and stir in a certain proportion to form a homogeneous solution, and then dry in a vacuum oven for 1 hour to obtain an all-solid polymer electrolyte membrane. The all-solid polymer electrolyte membrane prepared by the invention has good electrochemical performance, simple experimental process, wide application range and great application value.

Description

technical field [0001] The invention relates to a technology in the field of lithium ion batteries, in particular to a method for preparing an all-solid polymer electrolyte membrane containing biological materials. Background technique [0002] Lithium-ion batteries have received widespread attention and research because of their good safety, excellent energy density and very stable charge-discharge cycle performance. Electrolyte is one of the most important components of lithium-ion batteries. Its main function is To ensure the passage of lithium ions and prevent the passage of electrons, electrolytes can be divided into liquid electrolytes, gel electrolytes, and solid electrolytes according to their physical forms, but because liquid electrolytes and gel electrolytes contain liquid, the batteries made will have In recent years, people have begun to devote themselves to the development of safer solid-state electrolytes. [0003] Traditional polymer electrolytes are basical...

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Problems solved by technology

[0002] Lithium-ion batteries have received widespread attention and research because of their good safety, excellent energy density and very stable charge-discharge cycle performance. Electrolyte is one of the most important components of lithium-ion batteries. Its main function is To ensure the passage of lithium ions and prevent the passage of electrons, electrolytes can be divided into liquid electrolytes, gel electrolytes, and solid electrolytes according to their physical forms, but because liquid electrolytes and gel electrolytes contain liquid, the batteries made will have Potential safety hazards, in recent years people have begun to devote themselves to the development of safer solid-state electrolytes

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