title: Structure and ionic interactions of organic-inorganic composite polymer electrolytes studied by solid-state NMR and Raman spectroscopy.
abstract: Solid-state NMR studies of composite polymer electrolytes are reported. The materials consist of polyethylene oxide and an organic inorganic composite, together with a lithium salt, and are candidates for electrolytes in solid-state lithium ion batteries. Silicon and aluminum MAS and multiple quantum MAS are used to characterize the network character of the organic-inorganic composite, and spin diffusion measurements are used to determine the nanostructure of the polymer/composite blending. Multiple quantum spin counting is used to measure the ion aggregation. The NMR results are supported by Raman spectra, calorimetry, and impedance spectroscopy. From these experiments it is concluded that the composite suppresses polymer crystallization without suppressing its local mobility, and also suppresses the tendency for the ions to aggregate. This polymer composite thus appears very promising for application in lithium ion batteries.
authors.affiliation: Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, USA.
authors.forename: Chan Gyu
authors.initials: CG
authors.lastname: Joo
authors.forename: Lyudmila M
authors.initials: LM
authors.lastname: Bronstein
authors.forename: Robert L
authors.initials: RL
authors.lastname: Karlinsey
authors.forename: Josef W
authors.initials: JW
authors.lastname: Zwanziger
mesh_terms: D000535:Aluminum; D017607:Aluminum Compounds / Q000737:chemistry*; D000838:Anions; D004573:Electrolytes / Q000737:chemistry; D018020:Lithium Compounds / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008970:Molecular Weight; D036103:Nanotechnology; D011092:Polyethylene Glycols / Q000737:chemistry*; D011522:Protons; D012680:Sensitivity and Specificity; D012821:Silanes / Q000737:chemistry*; D012825:Silicon; D013059:Spectrum Analysis, Raman
chemical_list: C403136:3-glycidoxypropyltrimethoxysilane; D017607:Aluminum Compounds; D000838:Anions; D004573:Electrolytes; D018020:Lithium Compounds; D011522:Protons; D012821:Silanes; D011092:Polyethylene Glycols; D000535:Aluminum; D012825:Silicon