Highly Branched Crosslinked Poly(ethylene oxide) for Li-ion Battery Electrolytes
MetadataShow full item record
Lithium-ion batteries are important energy storage devices in the emerging sustainable energy landscape. Current batteries use flammable liquid electrolyte, which pose a serious safety concern and thus limit their wide adoption, especially for transportation. Solid polymer electrolytes (SPEs) based on poly(ethylene oxide) (PEO) have been widely explored as an alternate, but they are currently suffering from low conductivity at room temperatures due to high crystallinity. The purpose of this study was to design and test crosslinked polymers membranes based on PEO with amorphous nature and high free volume at room temperature. Three types of membranes were prepared from different blends of PEO, poly(ethylene glycol) diacrylate (PEGDA), poly(ethylene glycol) methyl ether acrylate and a zwitterionic monomer. These membranes were thoroughly characterized using for crystallinity (XRD), density, glass transition temperature (DSC) and ionic conductivity (Electrochemical Impedance Spectroscopy). Membranes containing blends of PEGDA and PEGMEA show an increase in conductivity at room temperature by 2 orders of magnitude than its PEO and PEGDA counterparts.