A review of the patents of lithium-ion battery polyolefin multilayer separator

doi:10.12028/j.issn.2095-4239.2018.0049

Abstract

Abstract: The nationality distribution, applicant distribution and the technical means and technical efficacy distribution of lithium-ion battery polyolefin multilayer separator were investigated from the view of patents. The result shows that Japan, China, South Korea and the United States are main technology exporter, Toray, Asahi, Sumitomo from Japan, LG from South Korea, Senior technology material Co., LTD and Chinese academy of science from China are the main applicants. Using a specific components in a layer, the design of modified layer, as well as the regulation of pore-forming process are the main technical approaches, aiming at the improvement of permeability, porosity, pore uniformity, heat resistance, heat shrinkage, heat closed performance, mechanical strength and ion permeability.

Key words: lithium-ion battery, separator, polyolefin, polyethylene, polypropylene

CLC Number:

TM911

CUI Haixing. A review of the patents of lithium-ion battery polyolefin multilayer separator[J]. Energy Storage Science and Technology, 2018, 7(4): 758-762.

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