摘要:
A method of manufacturing a separator for an electrochemical device according to an exemplary embodiment of the present disclosure includes extruding a resin composition including polyolefin and a diluent, stretching the extruded resin composition to obtain a polyolefin film, extracting the diluent from the obtained polyolefin film to obtain a porous polyolefin film, coating a slurry for forming a porous coating layer on at least one surface of the porous polyolefin film, and heat setting the porous polyolefin film coated with the slurry to obtain a composite separator with a porous coating layer.
摘要:
A polyolefin material that is formed by solid state drawing of a thermoplastic composition containing a continuous phase that includes a polyolefin matrix polymer and nanoinclusion additive is provided. The nanoinclusion additive is dispersed within the continuous phase as discrete nano-scale phase domains. When drawn, the nano-scale phase domains are able to interact with the matrix in a unique manner to create a network of nanopores.
摘要:
The present invention relates to a microporous membrane of polyethylene-based composite material with adhesion under hot pressing, which utilises ethylene-propylene rubber and polyisobutene rubber with medium molecular weights to modify high density polyethylene with a high degree of crystallisation, and utilises an ester of an aliphatic dicarboxylic acid with a flash point higher than 210°C as the process solvent and pore-forming agent for the membrane, to obtain the membrane with the property of adhesion under hot pressing; the membrane is hot-pressed with a positive electrode sheet so these adhere together, and the heat shrinkage of the membrane is inhibited thereby; the composite material membrane has high strength, resistance to high temperature, and can be used in lithium ion power batteries with a high degree of safety and a long cycle life.