Polymer composite diaphragm and its preparing method

Abstract

This invention discloses a polymer compound membrane and its preparation method, in which, the method includes: mixing strengthening bodies of a matrix film and inorganic nm materials in an organic solvent to get a uniform slurry to be coated on both sides of a non-woven cloth to get a polymer compound membrane, in which, said strengthening bodies are selected from the following three: 1, an organic monomer and its related initiator, 2, two or more than two polymers, 3, organic monomers and their related initiators and two or more than two polymers, 4, organic monomers and two or more than two polymers.

Description

technical field

[0001] The invention relates to a polymer composite diaphragm and a preparation method thereof. Background technique

[0002] Liquid lithium-ion battery is a new type of secondary battery after Ni-H, Ni-Cd and lead-acid secondary batteries. In the development process of nearly 20 years, due to its inherent advantages such as single battery voltage High platform, friendly to the environment, high weight-to-energy ratio and no memory effect, etc., have enabled the rapid development of liquid lithium-ion batteries. Polymer lithium-ion batteries are a new generation of battery products after liquid lithium-ion batteries. In polymer lithium-ion battery components, except for packaging methods, polymer electrolyte membranes are the most obvious difference between polymer batteries and liquid lithium-ion battery materials. , so it is also the top priority of the research. In addition to separating the positive and negative electrodes and providing lithium ion chan...