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Ionic conductivity in polyphosphazene polymer electrolytes prepared by the living cationic polymerization

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Title: Ionic conductivity in polyphosphazene polymer electrolytes prepared by the living cationic polymerization
Authors: Paulsdorf, J.1, Burjanadze, M.1, Hagelschur, K.1, Wiemhöfer, H.-D. hdw@uni-muenster.de
Source: Solid State Ionics. Apr2004, Vol. 169 Issue 1-4, p25-33. 9p.
Subjects: Ionic mobility, Polyphosphazenes, Polymerization, Electrolytes
Abstract: Two polyphosphazene-based electrolytes were synthesized. The first was the polymer electrolyte poly[bis(methoxy-ethoxy-ethoxy-)phosphazene] (MEEP) with lithium triflate, the second was sodium salt of sulfonated poly[bis(phenoxyethoxy)phosphazene] (PhEP) as a polyelectrolyte. The “living” cationic polymerization of the monomer Cl3P&z.dbnd6;NSi(CH3)3 was used to obtain the polymer precursor poly(dichlorophosphazene). The final polymers were obtained from the precursor by nucleophilic substitution. The monomer was synthesized via a recently reported route. The emphasis lied on testing the accessability and properties of electrolyte materials obtained by the newer synthetic techniques. The chosen synthetic approach proved to be a suitable and straightforward access to functionalized polyphosphazenes and therefore to corresponding polymer-based electrolytes.The ionic conductivity was studied by impedance spectroscopy in the temperature range between 20 and 70 °C. The temperature dependence of the conductivity of MEEP/LiCF3SO3 is described by the Vogel–Tamman–Fulcher (VTF) equation. At 25 °C, its conductivity was 10-5 S cm-1.The conductivity of the sodium salt of sulfonated PhEP was especially sensitive to a changing water partial pressure and is useful as humidity-sensitive sensor. In the presence of a water-saturated atmosphere, sulfonated PhEP showed a conductivity of 4.7×10-2 at 25 °C. [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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  Data: Ionic conductivity in polyphosphazene polymer electrolytes prepared by the living cationic polymerization
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  Data: <searchLink fieldCode="AR" term="%22Paulsdorf%2C+J%2E%22">Paulsdorf, J.</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="%22Hagelschur%2C+K%2E%22">Hagelschur, K.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Wiemhöfer%2C+H%2E-D%2E%22">Wiemhöfer, H.-D.</searchLink><i> hdw@uni-muenster.de</i>
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  Data: <searchLink fieldCode="JN" term="%22Solid+State+Ionics%22">Solid State Ionics</searchLink>. Apr2004, Vol. 169 Issue 1-4, p25-33. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Ionic+mobility%22">Ionic mobility</searchLink><br /><searchLink fieldCode="DE" term="%22Polyphosphazenes%22">Polyphosphazenes</searchLink><br /><searchLink fieldCode="DE" term="%22Polymerization%22">Polymerization</searchLink><br /><searchLink fieldCode="DE" term="%22Electrolytes%22">Electrolytes</searchLink>
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  Data: Two polyphosphazene-based electrolytes were synthesized. The first was the polymer electrolyte poly[bis(methoxy-ethoxy-ethoxy-)phosphazene] (MEEP) with lithium triflate, the second was sodium salt of sulfonated poly[bis(phenoxyethoxy)phosphazene] (PhEP) as a polyelectrolyte. The “living” cationic polymerization of the monomer Cl3P&z.dbnd6;NSi(CH3)3 was used to obtain the polymer precursor poly(dichlorophosphazene). The final polymers were obtained from the precursor by nucleophilic substitution. The monomer was synthesized via a recently reported route. The emphasis lied on testing the accessability and properties of electrolyte materials obtained by the newer synthetic techniques. The chosen synthetic approach proved to be a suitable and straightforward access to functionalized polyphosphazenes and therefore to corresponding polymer-based electrolytes.The ionic conductivity was studied by impedance spectroscopy in the temperature range between 20 and 70 °C. The temperature dependence of the conductivity of MEEP/LiCF3SO3 is described by the Vogel–Tamman–Fulcher (VTF) equation. At 25 °C, its conductivity was 10-5 S cm-1.The conductivity of the sodium salt of sulfonated PhEP was especially sensitive to a changing water partial pressure and is useful as humidity-sensitive sensor. In the presence of a water-saturated atmosphere, sulfonated PhEP showed a conductivity of 4.7×10-2 at 25 °C. [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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        Value: 10.1016/j.ssi.2004.01.012
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        Text: English
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      – SubjectFull: Polyphosphazenes
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      – SubjectFull: Polymerization
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