Sodium-23 NMR and complex impedance studies of gel electrolytes based on poly(acrylonitrile). Interim technical report for period ending July 1993

Technical Report · Fri Apr 29 04:00:00 EDT 1994

OSTI ID:6981098

Greenbaum, S G; Li, J; Stallworth, P E; Croce, F; Slane, S

Highly conducting gel electrolytes prepared from mixtures of poly(acrylonitrile) (PAN), ethylene carbonate (EC), propylene carbonate (PC) and NaClO4 have been studied by complex impedance, differential scanning calorimetry (DSC) and 23Na nuclear magnetic resonance (NMR) spectroscopy. Ionic motional correlation times spanning nearly five orders of magnitude, probed by temperature-dependent dynamical features of the 23Na quadrupole-broadened NMR lineshape, are strongly influenced by the single glass transition temperature observed in the gel electrolyte. Dielectric measurements of mixtures of PAN, EC and PC suggest that the polar nitrile group in PAN may interact with Na+ ions in the gel. All results are consistent with the conclusion that PAN provides stability to the gel network down to the immediate vicinity of the Na+ ions, rather than acting as a rigid framework for regions of liquid electrolyte.

• Research Organization: Hunter Coll., New York, NY (United States). Dept. of Physics and Astronomy
• OSTI ID: 6981098
• Report Number(s): AD-A-280330/2/XAB; TR--9; CNN: N00014-92-J-1629
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACRYLONITRILE
ALKALI METAL ISOTOPES
ALKENES
CARBON COMPOUNDS
CARBONATES
COLLOIDS
DISPERSIONS
DOCUMENT TYPES
ELECTRIC IMPEDANCE
ELECTROLYTES
ETHYLENE
GELS
HYDROCARBONS
IMPEDANCE
ISOTOPES
LIGHT NUCLEI
NITRILES
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PROGRESS REPORT
PROPYLENE
SODIUM 23
SODIUM ISOTOPES
STABLE ISOTOPES