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Polymer electrolytes based on cross-linked cyclotriphosphazenes.

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Title: Polymer electrolytes based on cross-linked cyclotriphosphazenes.
Authors: Kaskhedikar, N.1, Burjanadze, M.1, Karatas, Y.1,2, Wiemhöfer, H.-D.1 hdw@uni-muenster.de
Source: Solid State Ionics. Nov2006, Vol. 177 Issue 35/36, p3129-3134. 6p.
Subjects: Physical sciences, Polyelectrolytes, Biomechanics, Physical & theoretical chemistry
Abstract: Substituted cyclotriphosphazenes were used to prepare lithium ion conducting polymer networks. Two types of compounds were synthesized starting with the precursor hexachlorocyclotriphosphazene (HCCP): Type I (CVEEP) in which all the chlorine atoms in HCCP were replaced by vinyloxyethoxyethoxy groups (VEE = –OCH2CH2OCH2CH2OCH=CH2), and type II (CVMEEP) in which half of the chlorine was replaced by VEE and the other half by methoxyethoxyethoxy groups (MEE= –OCH2CH2OCH2CH2OCH3). The terminal vinyl groups were used to build up a network by a thermally initiated cross-linking of lithium salt containing membranes. Polymer electrolytes with dissolved LiSO3CF3 and LiN(SO2CF3)2 were investigated by impedance measurements. The ionic conductivity of CVMEEP with 10 wt.% LiSO3CF3 was 3.2×10−5 S/cm at 30 °C and 4.1×10−4 S/cm at 90 °C. Lower conductivity values in the range 10−8–10−9 S/cm were obtained at 30 °C for the highly crosslinked CVEEP. An interesting polymer electrolyte with good mechanical properties and a good conductivity of 1.3 × 10−5 S/cm (30 °C) was obtained from a solution of MEEP (=poly[bis(methoxy–ethoxy–ethoxy)phosphazene]) and LiSO3CF3 in CVEEP as an interpenetrating network. [Copyright &y& Elsevier]
Copyright of Solid State Ionics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 23221528
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  Data: Polymer electrolytes based on cross-linked cyclotriphosphazenes.
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  Data: <searchLink fieldCode="AR" term="%22Kaskhedikar%2C+N%2E%22">Kaskhedikar, N.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Burjanadze%2C+M%2E%22">Burjanadze, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Karatas%2C+Y%2E%22">Karatas, Y.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Wiemhöfer%2C+H%2E-D%2E%22">Wiemhöfer, H.-D.</searchLink><relatesTo>1</relatesTo><i> hdw@uni-muenster.de</i>
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  Data: <searchLink fieldCode="JN" term="%22Solid+State+Ionics%22">Solid State Ionics</searchLink>. Nov2006, Vol. 177 Issue 35/36, p3129-3134. 6p.
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  Data: Substituted cyclotriphosphazenes were used to prepare lithium ion conducting polymer networks. Two types of compounds were synthesized starting with the precursor hexachlorocyclotriphosphazene (HCCP): Type I (CVEEP) in which all the chlorine atoms in HCCP were replaced by vinyloxyethoxyethoxy groups (VEE = –OCH2CH2OCH2CH2OCH=CH2), and type II (CVMEEP) in which half of the chlorine was replaced by VEE and the other half by methoxyethoxyethoxy groups (MEE= –OCH2CH2OCH2CH2OCH3). The terminal vinyl groups were used to build up a network by a thermally initiated cross-linking of lithium salt containing membranes. Polymer electrolytes with dissolved LiSO3CF3 and LiN(SO2CF3)2 were investigated by impedance measurements. The ionic conductivity of CVMEEP with 10 wt.% LiSO3CF3 was 3.2×10−5 S/cm at 30 °C and 4.1×10−4 S/cm at 90 °C. Lower conductivity values in the range 10−8–10−9 S/cm were obtained at 30 °C for the highly crosslinked CVEEP. An interesting polymer electrolyte with good mechanical properties and a good conductivity of 1.3 × 10−5 S/cm (30 °C) was obtained from a solution of MEEP (=poly[bis(methoxy–ethoxy–ethoxy)phosphazene]) and LiSO3CF3 in CVEEP as an interpenetrating network. [Copyright &y& Elsevier]
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  Data: <i>Copyright of Solid State Ionics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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              Text: Nov2006
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