Complexes formed between lithium salts and low molecular weight (0.5 kg mol−1) poly(ethylene glycol) have been investigated by differential scanning calorimetry, 7Li nuclear magnetic resonance (NMR), and complex impedance measurements. 7Li NMR linewidths and hence ionic mobilities are strongly influenced by polymer segmental motion above the glass transition. Strong cation—anion interactions in LiBF4 complexes are evidenced by substantial 7Li19F dipolar coupling. Ionic conductivity results are similar to those reported for widely studied poly(ethylene oxide) complexes, in that broad conductivity vs salt concentration maxima are found. Finally, addition of up to 30 wt% of the inert ceramic powder γ-LiAlO2, while improving the mechanical properties of the samples, is found to have a negligible effect on ionic conductivity.

Ionic conductivity and 7Li NMR Study of Poly(ethylene glycol) complexed with lithium salts / Panero, Stefania; Scrosati, Bruno; S. G., Greenbaum. - In: ELECTROCHIMICA ACTA. - ISSN 0013-4686. - STAMPA. - 37:9(1992), pp. 1533-1539. [10.1016/0013-4686(92)80106-V]

Ionic conductivity and 7Li NMR Study of Poly(ethylene glycol) complexed with lithium salts

PANERO, Stefania;SCROSATI, Bruno;
1992

Abstract

Complexes formed between lithium salts and low molecular weight (0.5 kg mol−1) poly(ethylene glycol) have been investigated by differential scanning calorimetry, 7Li nuclear magnetic resonance (NMR), and complex impedance measurements. 7Li NMR linewidths and hence ionic mobilities are strongly influenced by polymer segmental motion above the glass transition. Strong cation—anion interactions in LiBF4 complexes are evidenced by substantial 7Li19F dipolar coupling. Ionic conductivity results are similar to those reported for widely studied poly(ethylene oxide) complexes, in that broad conductivity vs salt concentration maxima are found. Finally, addition of up to 30 wt% of the inert ceramic powder γ-LiAlO2, while improving the mechanical properties of the samples, is found to have a negligible effect on ionic conductivity.
1992
Li NMR; polyethylene glycol; lithiun salts
01 Pubblicazione su rivista::01a Articolo in rivista
Ionic conductivity and 7Li NMR Study of Poly(ethylene glycol) complexed with lithium salts / Panero, Stefania; Scrosati, Bruno; S. G., Greenbaum. - In: ELECTROCHIMICA ACTA. - ISSN 0013-4686. - STAMPA. - 37:9(1992), pp. 1533-1539. [10.1016/0013-4686(92)80106-V]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/461423
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