Liquid organic electrolytes: blends of low molecular weight methoxyoligooxyethylene (MPEGs)/LiTFSI salt, 2017
Alshahrani, Rasha
2010-2019
Blends containing methoxyoligooxyethyleneglycol (MPEGs) (MW 350 and 550) and bis(trifluoromethane)sulfonimide lithium (LiTFSI) salt were prepared by solution blending process using tetrahydrofuran (THF) as a solvent. The ionic conductivity of the blends of different compositions were determined at four temperatures i.e. 25C, 40C, 60C and 70C. A maximum ionic conductivity value of 3.9x10-3 S cm-1 at 25C was obtained for the blends containing MPEG-350 at an ethylene oxide to lithium salt ratio of 1:10. The ionic conductivity increases with increasing temperature and shows that the ion transport is aided by the segmental motion of the MPEG chains. 7Li NMR spectroscopy was used to study the nature and dynamics of the salt clusters in the blends KEY TERMS: Methoxypolyethylene glycol (MPEG), low molecular weight MPEGs, LiTFSI salt, Triglyme Boron, Ionic conductivity, 7Li NMR, Lithum-air battery, Liquid Organic Electrolytes, Ionic conductivity of blend of MPEGs/Triglyme Boron/LITFSI salt, Organic Chemistry, Polymer Chemistry
text
application/pdf
2017-12-15
thesis
Master of Science (MS)
Clark Atlanta University
Chemistry
Khan, Ishrat Parker, Cass D. Reed, James L.
Georgia--Atlanta
http://hdl.handle.net/20.500.12322/cau.td:2017_alshahrani_rasha