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Ionic conductivity of polymer electrolyte membranes based on polyphosphazene with oligo(propylene oxide) side chains

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Title: Ionic conductivity of polymer electrolyte membranes based on polyphosphazene with oligo(propylene oxide) side chains
Authors: Kaskhedikar, N.1,2, Paulsdorf, J.1, Burjanadze, M.1, Karatas, Y.1,2, Wilmer, D.3, Roling, B.4, Wiemhöfer, H.-D.1 hdw@uni-muenster.de
Source: Solid State Ionics. Mar2006, Vol. 177 Issue 7/8, p703-707. 5p.
Subjects: Ions, Polyelectrolytes, Polyphosphazenes, Propylene oxide
Abstract: Abstract: A polyphosphazene [NP(NHR)2] n with oligo[propylene oxide] side chains − R =–[CH(CH3)–CH2O] m –CH3 (m =6–10) was synthesized by living cationic polymerisation and polymer-analogue substitution of chlorine from the intermediate precursor [NPCl2] n using the corresponding primary amine RNH2. The polymer had an average molecular weight of 3.3×105 D. Polymer electrolytes with different concentrations of dissolved lithium triflate (LiCF3SO3) were prepared. Mechanically stable polymer electrolyte membranes were formed using UV radiation induced crosslinking of the polymer salt mixture in the presence of benzophenone as photoinitiator. The glass transition temperature of the parent polymer was found to be −75 °C before cross linking. It increases after crosslinking and with increasing amounts of salt to a maximum of −55 °C for 20 wt.% LiCF3SO3. The ionic conductivity was determined by impedance spectroscopy in the temperature range 0–80 °C. The highest conductivity was found for a salt concentration of 20 wt.% LiCF3SO3: 6.5×10−6 S·cm−1 at 20 °C and 2.8×10−4 S cm−1 at 80 °C. The temperature dependence of the conductivities was well described by the MIGRATION concept. [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.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 20181633
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Ionic conductivity of polymer electrolyte membranes based on polyphosphazene with oligo(propylene oxide) side chains
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  Data: <searchLink fieldCode="AR" term="%22Kaskhedikar%2C+N%2E%22">Kaskhedikar, N.</searchLink><relatesTo>1,2</relatesTo><br /><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="%22Karatas%2C+Y%2E%22">Karatas, Y.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Wilmer%2C+D%2E%22">Wilmer, D.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Roling%2C+B%2E%22">Roling, B.</searchLink><relatesTo>4</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>. Mar2006, Vol. 177 Issue 7/8, p703-707. 5p.
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  Data: <searchLink fieldCode="DE" term="%22Ions%22">Ions</searchLink><br /><searchLink fieldCode="DE" term="%22Polyelectrolytes%22">Polyelectrolytes</searchLink><br /><searchLink fieldCode="DE" term="%22Polyphosphazenes%22">Polyphosphazenes</searchLink><br /><searchLink fieldCode="DE" term="%22Propylene+oxide%22">Propylene oxide</searchLink>
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  Data: Abstract: A polyphosphazene [NP(NHR)2] n with oligo[propylene oxide] side chains − R =–[CH(CH3)–CH2O] m –CH3 (m =6–10) was synthesized by living cationic polymerisation and polymer-analogue substitution of chlorine from the intermediate precursor [NPCl2] n using the corresponding primary amine RNH2. The polymer had an average molecular weight of 3.3×105 D. Polymer electrolytes with different concentrations of dissolved lithium triflate (LiCF3SO3) were prepared. Mechanically stable polymer electrolyte membranes were formed using UV radiation induced crosslinking of the polymer salt mixture in the presence of benzophenone as photoinitiator. The glass transition temperature of the parent polymer was found to be −75 °C before cross linking. It increases after crosslinking and with increasing amounts of salt to a maximum of −55 °C for 20 wt.% LiCF3SO3. The ionic conductivity was determined by impedance spectroscopy in the temperature range 0–80 °C. The highest conductivity was found for a salt concentration of 20 wt.% LiCF3SO3: 6.5×10−6 S·cm−1 at 20 °C and 2.8×10−4 S cm−1 at 80 °C. The temperature dependence of the conductivities was well described by the MIGRATION concept. [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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