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

Journal Article · Wed Sep 01 00:00:00 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), Vol. 5:9; ISSN 0897-4756
• Country of Publication: United States
• Language: English

Related Subjects

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