sup 7 Li NMR study of polymer electrolytes based on composites of poly(bis((methoxyethoxy)ethoxy)phosphazene) and poly(ethylene oxide)

Journal Article · · Chemistry of Materials; (United States)

OSTI ID:7238924

Adamic, K J; Greenbaum, S G ^[1]; Abraham, K M; Alamgir, M ^[2]; Wintersgill, M C; Fontanella, J J ^[3]

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1. City Univ. of New York, NY (United States)
2. EIC Labs. Inc., Norwood, MA (United States)
3. Naval Academy, Annapolis, MD (United States)

Polymer electrolytes consisting of mixtures of poly(bis((methoxyethoxy)ethoxy)phosphazene) (MEEP) and poly(ethylene oxide) (PEO) or poly(propylene oxide) (PPO) complexed with LiClO{sub 4} or LiBF{sub 4} have been studied by differential scanning calorimetry (DSC) and {sup 7}Li nuclear magnetic resonance (NMR) spectroscopy. Both types of measurements demonstrate that the MEEP/PEO composites are multiphase in that amorphous MEEP-like and crystalline PEO-like phases are present in the samples. The NMR results show that significant Li{sup +} ion mobility in the MEEP-like phase occurs only above the lowest temperature glass transition as indicated by DSC measurements. Strong cation-anion association effects are suggested by dipolar broadening in BF{sub 4}{minus} containing materials and by precipitation of salt crystallites from the MEEP/PPO composite at elevated temperature.

• OSTI ID: 7238924
• Journal Information: Chemistry of Materials; (United States), Journal Name: Chemistry of Materials; (United States) Vol. 3:3; ISSN CMATE; ISSN 0897-4756
• Country of Publication: United States
• Language: English

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25 ENERGY STORAGE
250903* -- Energy Storage-- Batteries-- Materials
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALCOHOLS
ALKALI METAL COMPOUNDS
ALKALI METAL ISOTOPES
ALKALI METALS
BORON COMPOUNDS
BORON FLUORIDES
CHARGED PARTICLES
CHLORINE COMPOUNDS
COHERENT SCATTERING
DATA
DIFFRACTION
ELECTROLYTES
ELEMENTS
EXPERIMENTAL DATA
FLUORIDES
FLUORINE COMPOUNDS
GLYCOLS
HALIDES
HALOGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
ION MOBILITY
IONS
ISOTOPES
LIGHT NUCLEI
LITHIUM
LITHIUM 7
LITHIUM COMPOUNDS
LITHIUM ISOTOPES
LITHIUM PERCHLORATES
MAGNETIC RESONANCE
METALS
MOBILITY
NUCLEAR MAGNETIC RESONANCE
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PARTICLE MOBILITY
PERCHLORATES
PHASE STUDIES
POLYETHYLENE GLYCOLS
POLYMERS
RESONANCE
SCATTERING
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
X-RAY DIFFRACTION