Patent ID: 9023520
Filing Date: 2015-05-05
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A lithium ion battery, comprising: a positive electrode; a negative electrode; a microporous polymer separator disposed between the negative electrode and the positive electrode; and a polymer having a chelating agent chemically bonded thereto, the polymer having the chelating agent chemically bonded thereto being incorporated into the lithium ion battery i) as particles dispersed throughout a main polymer of the microporous polymer separator or ii) as a separate layer on a surface of the microporous polymer separator; wherein: the polymer having the chelating agent chemically bonded thereto is selected from the group consisting of polyethylene terephthalates, polyvinylidene fluorides, polyamides, polyurethanes, polycarbonates, polyesters, polyetheretherketones, polyethersulfones, polyimides, polyamide-imides, polyethers, polyoxymethylenes, polybutylene terephthalates, polyethylenenaphthenates, polybutenes, polyolefins, polyolefin copolymers, acrylonitrile-butadiene styrene copolymers, polystyrene copolymers, polymethylmethacrylates, polyvinyl chlorides, polysiloxane polymers, polybenzimidazoles, polybenzoxazoles, polyphenylenes, polyarylene ether ketones, polyperfluorocyclobutanes, polytetrafluoroethylenes, polyvinylidene fluoride copolymers, polyvinylidene fluoride terpolymers, polyvinylidene chlorides, polyvinylfluorides, liquid crystalline polymers, polyaramides, polyphenylene oxides, and combinations thereof; the chelating agent is selected from the group consisting of a crown ether, a podand, a lariat ether, a calixarene, a calixcrown, and combinations thereof; and the chelating agent complexes with metal cations of at least one of Mn, Co, Ni, or Fe in a manner sufficient to not affect movement of lithium ions across the microporous polymer separator during operation of the lithium ion battery.