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Liquid Organic Electrolytes: Blends of Low Molecular Weight Methoxyoligooxyethylene (MPEGs)/LiTFSI Salt

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. 25°C, 40°C, 60°C and 70°C. A maximum ionic conductivity value of 3.9x10-3 S cm-1 at 25°C 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

Identiferoai:union.ndltd.org:auctr.edu/oai:digitalcommons.auctr.edu:cauetds-1209
Date15 December 2017
CreatorsAlshahrani, Rasha
PublisherDigitalCommons@Robert W. Woodruff Library, Atlanta University Center
Source SetsAtlanta University Center
Detected LanguageEnglish
Typetext
Formatapplication/pdf
SourceElectronic Theses & Dissertations Collection for Atlanta University & Clark Atlanta University

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