Lithium-7 NMR and ionic conductivity studies of gel electrolytes based on poly(acrylonitrile)

Journal Article · Wed Sep 01 04:00:00 EDT 1993 · Chemistry of Materials; (United States)

DOI:https://doi.org/10.1021/cm00033a014· OSTI ID:5042888

Croce, F ^[1]; Brown, S D; Greenbaum, S G ^[2]; Slane, S M; Salomon, M ^[3]

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1. Univ. of Rome (Italy)
2. Hunter College of CUNY, New York, NY (United States)
3. Army Research Lab., Fort Monmouth, NJ (United States)

Composite gel electrolytes prepared from mixtures of poly(acrylonitrile) (PAN), ethylene carbonate (EC), propylene carbonate (PC), and LiClO[sub 4] or LiAsF[sub 6] have been investigated by complex impedance, differential scanning calorimetry (DSC), and [sup 7]Li nuclear magnetic resonance (NMR) spectroscopy. The ionic conductivity of a gel containing LiAsF[sub 6] reaches 10[sup [minus]2] S/cm at 60[degrees]C. Although the conductivity of the gels approach that found in EC/PC liquid electrolytes, NMR line width, and spin-lattice relaxation time (T[sub 1]) measurements indicate that even short-range ionic mobility is impeded by the presence of the PAN. As in the case of amorphous polyether-salt polymer electrolytes, the onset of [sup 7]Li motional line narrowing in the gels is strongly correlated with the DSC-determined glass transition temperature. 6 figs., 1 tab.

• OSTI ID: 5042888
• Journal Information: Chemistry of Materials; (United States), Journal Name: Chemistry of Materials; (United States) Vol. 5:9; ISSN CMATEX; ISSN 0897-4756
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250903 -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
ACRYLONITRILE
ALKALI METAL COMPOUNDS
ALKALI METAL ISOTOPES
ALKALI METALS
ASTATINE COMPOUNDS
COLLOIDS
DISPERSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROLYTES
ELEMENTS
FLUORIDES
FLUORINE COMPOUNDS
GELS
HALIDES
HALOGEN COMPOUNDS
IONIC CONDUCTIVITY
ISOTOPES
LIGHT NUCLEI
LITHIUM
LITHIUM 7
LITHIUM COMPOUNDS
LITHIUM ISOTOPES
MAGNETIC RESONANCE
METALS
NITRILES
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
PHYSICAL PROPERTIES
POLYMERS
RESONANCE
STABLE ISOTOPES