Spin probe ESR studies of PEGxLiClO4 polymer electrolyte systems

Shrivalli N. Bhat; A. Jay Sharma; S. S. Rao; S. V. Bhat

doi:10.1007/BF02410323

Spin probe ESR studies of PEG_xLiClO₄ polymer electrolyte systems

Shrivalli N. Bhat^*, A. Jay Sharma, S. S. Rao, S. V. Bhat

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

The technique of Electron Spin Resonance (ESR) is shown to be useful in the study of dynamics of solid polymer electrolytes (SPE). Through the ESR of the nitroxide radical (2,2,6,6-tetramethyl-1-piperidine-l-oxyl; TEMPO) dispersed in the SPE PEG₄₆LiClO₄ temperature dependence of correlation time is found. The glass transition temperature T_g is estimated to be -51 °C from the measurement of T_50G, the temperature at which the extrema separation 2A_zz becomes 50G and is found to be close to that measured using DSC (-51.7°C). T_g for pure PEG-2000, which could not be measured from DSC because of its high crystallinity, is determined to be -72 °C by spin probe ESR.

Original language	English (US)
Pages (from-to)	139-141
Number of pages	3
Journal	Ionics
Volume	10
Issue number	1-2
DOIs	https://doi.org/10.1007/BF02410323
State	Published - 2004

ASJC Scopus subject areas

General Chemical Engineering
General Materials Science
General Engineering
General Physics and Astronomy

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title = "Spin probe ESR studies of PEGxLiClO4 polymer electrolyte systems",

abstract = "The technique of Electron Spin Resonance (ESR) is shown to be useful in the study of dynamics of solid polymer electrolytes (SPE). Through the ESR of the nitroxide radical (2,2,6,6-tetramethyl-1-piperidine-l-oxyl; TEMPO) dispersed in the SPE PEG46LiClO4 temperature dependence of correlation time is found. The glass transition temperature Tg is estimated to be -51 °C from the measurement of T50G, the temperature at which the extrema separation 2Azz becomes 50G and is found to be close to that measured using DSC (-51.7°C). Tg for pure PEG-2000, which could not be measured from DSC because of its high crystallinity, is determined to be -72 °C by spin probe ESR.",

author = "Bhat, {Shrivalli N.} and Sharma, {A. Jay} and Rao, {S. S.} and Bhat, {S. V.}",

year = "2004",

doi = "10.1007/BF02410323",

language = "English (US)",

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pages = "139--141",

journal = "Ionics",

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T1 - Spin probe ESR studies of PEGxLiClO4 polymer electrolyte systems

AU - Bhat, Shrivalli N.

AU - Sharma, A. Jay

AU - Rao, S. S.

AU - Bhat, S. V.

PY - 2004

Y1 - 2004

N2 - The technique of Electron Spin Resonance (ESR) is shown to be useful in the study of dynamics of solid polymer electrolytes (SPE). Through the ESR of the nitroxide radical (2,2,6,6-tetramethyl-1-piperidine-l-oxyl; TEMPO) dispersed in the SPE PEG46LiClO4 temperature dependence of correlation time is found. The glass transition temperature Tg is estimated to be -51 °C from the measurement of T50G, the temperature at which the extrema separation 2Azz becomes 50G and is found to be close to that measured using DSC (-51.7°C). Tg for pure PEG-2000, which could not be measured from DSC because of its high crystallinity, is determined to be -72 °C by spin probe ESR.

AB - The technique of Electron Spin Resonance (ESR) is shown to be useful in the study of dynamics of solid polymer electrolytes (SPE). Through the ESR of the nitroxide radical (2,2,6,6-tetramethyl-1-piperidine-l-oxyl; TEMPO) dispersed in the SPE PEG46LiClO4 temperature dependence of correlation time is found. The glass transition temperature Tg is estimated to be -51 °C from the measurement of T50G, the temperature at which the extrema separation 2Azz becomes 50G and is found to be close to that measured using DSC (-51.7°C). Tg for pure PEG-2000, which could not be measured from DSC because of its high crystallinity, is determined to be -72 °C by spin probe ESR.

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Spin probe ESR studies of PEG_xLiClO₄ polymer electrolyte systems

Abstract

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