Ionic liquid type cations in anionic polyurethane ionomer: Effects on thermal and dielectric properties

Shih Wa Wang, Ralph H. Colby

Research output: Contribution to journalConference article

Abstract

Single-ion conductors have potential utility for electronic devices like battery membranes, actuators and other applications. For such applications, both high ionic conductivities and high modulus are desirable. To achieve these two goals, polyurethane ionomers can be suitable candidates: the hydrogen bonded hard phase provides good modulus while the soft phase (PEO in our system) can still facilitate ion transportation. However, the presence of ions such as sodium ions usually elaborates soft phase Tg and resulting in low ionic conductivity. By introducing ionic liquid type cations we can reduce the soft phase Tg and significantly improve ionic conductivity. To further increase ionic conductivity, we attached ether-oxygens on the cations and demonstrate that the cations with ether-oxygens can self-solvate and have higher mobility and conducting ion concentration without changing Tg too much.

Original languageEnglish (US)
JournalACS National Meeting Book of Abstracts
StatePublished - Dec 1 2010
Event239th ACS National Meeting and Exposition - San Francisco, CA, United States
Duration: Mar 21 2010Mar 25 2010

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Ionic Liquids
Polyurethanes
Ionomers
Ionic liquids
Dielectric properties
Cations
Ionic conductivity
Thermodynamic properties
Positive ions
Ions
Ether
Ethers
Oxygen
Polyethylene oxides
Hydrogen
Actuators
Sodium
Membranes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

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abstract = "Single-ion conductors have potential utility for electronic devices like battery membranes, actuators and other applications. For such applications, both high ionic conductivities and high modulus are desirable. To achieve these two goals, polyurethane ionomers can be suitable candidates: the hydrogen bonded hard phase provides good modulus while the soft phase (PEO in our system) can still facilitate ion transportation. However, the presence of ions such as sodium ions usually elaborates soft phase Tg and resulting in low ionic conductivity. By introducing ionic liquid type cations we can reduce the soft phase Tg and significantly improve ionic conductivity. To further increase ionic conductivity, we attached ether-oxygens on the cations and demonstrate that the cations with ether-oxygens can self-solvate and have higher mobility and conducting ion concentration without changing Tg too much.",
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T2 - Effects on thermal and dielectric properties

AU - Wang, Shih Wa

AU - Colby, Ralph H.

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AB - Single-ion conductors have potential utility for electronic devices like battery membranes, actuators and other applications. For such applications, both high ionic conductivities and high modulus are desirable. To achieve these two goals, polyurethane ionomers can be suitable candidates: the hydrogen bonded hard phase provides good modulus while the soft phase (PEO in our system) can still facilitate ion transportation. However, the presence of ions such as sodium ions usually elaborates soft phase Tg and resulting in low ionic conductivity. By introducing ionic liquid type cations we can reduce the soft phase Tg and significantly improve ionic conductivity. To further increase ionic conductivity, we attached ether-oxygens on the cations and demonstrate that the cations with ether-oxygens can self-solvate and have higher mobility and conducting ion concentration without changing Tg too much.

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