High Hydroxide Conductivity in Polymerized Ionic Liquid Block Copolymers.

Herein, we report a polymerized ionic liquid diblock copolymer with high hydroxide conductivity and nanoscale morphology. Surprisingly, the conductivity is not only higher (over an order of magnitude) than its random copolymer analog at the same ion and water content, but also higher than its homopolymer analog, which has a higher ion and water content than the block copolymer. These results should have a significant impact on low-cost (platinum-free), long-lasting, solid-state alkaline fuel cells.

[1]  K. Winey,et al.  Transport Properties of Sulfonated Poly(styrene-b-isobutylene-b-styrene) Triblock Copolymers at High Ion-Exchange Capacities , 2006 .

[2]  Moon Jeong Park,et al.  Enhanced proton transport in nanostructured polymer electrolyte/ionic liquid membranes under water-free conditions. , 2010, Nature communications.

[3]  H. Abruña,et al.  Phosphonium-functionalized polyethylene: a new class of base-stable alkaline anion exchange membranes. , 2012, Journal of the American Chemical Society.

[4]  Michael A. Hickner,et al.  Influence of chemical composition and sequence length on the transport properties of proton exchange membranes , 2006 .

[5]  Jian‐mei Lu,et al.  Cross-Linked Alkaline Ionic Liquid-Based Polymer Electrolytes for Alkaline Fuel Cell Applications , 2010 .

[6]  Y. Elabd,et al.  Relative Chemical Stability of Imidazolium-Based Alkaline Anion Exchange Polymerized Ionic Liquids , 2011 .

[7]  Huamin Zhang,et al.  Imidazolium functionalized polysulfone anion exchange membrane for fuel cell application , 2011 .

[8]  M. Hickner,et al.  Ion Motion in Anion and Proton-Conducting Triblock Copolymers , 2013 .

[9]  Robert B. Moore,et al.  State of understanding of nafion. , 2004, Chemical reviews.

[10]  N. Balsara,et al.  Influence of Bound Ion on the Morphology and Conductivity of Anion-Conducting Block Copolymers , 2013 .

[11]  L. Pratt,et al.  Mechanism of Tetraalkylammonium Headgroup Degradation in Alkaline Fuel Cell Membranes , 2008 .

[12]  Karen I. Winey,et al.  Polymerized Ionic Liquid Block and Random Copolymers: Effect of Weak Microphase Separation on Ion Transport , 2012 .

[13]  Zhiqing Shi,et al.  Synthesis and proton conductivity of partially sulfonated poly([vinylidene difluoride-co-hexafluoropropylene]-b-styrene) block copolymers , 2005 .

[14]  Junhua Wang,et al.  Synthesis of multi-block poly(arylene ether sulfone) copolymer membrane with pendant quaternary ammo , 2011 .

[15]  R. Slade,et al.  Prospects for Alkaline Anion‐Exchange Membranes in Low Temperature Fuel Cells , 2005 .

[16]  Andrew M. Herring,et al.  Tertiary sulfonium as a cationic functional group for hydroxide exchange membranes , 2012 .

[17]  B. Améduri,et al.  Polymeric materials as anion-exchange membranes for alkaline fuel cells , 2011 .

[18]  J. Mcgrath,et al.  Influence of microstructure and chemical composition on proton exchange membrane properties of sulfonated–fluorinated, hydrophilic–hydrophobic multiblock copolymers , 2009 .

[19]  K. M. Lee,et al.  Alkaline fuel cell membranes from xylylene block ionenes , 2009 .

[20]  Christopher L. Soles,et al.  Polymers for energy storage and delivery : polyelectrolytes for batteries and fuel cells , 2012 .

[21]  Daniel R. King,et al.  Environmental chamber for in situ dynamic control of temperature and relative humidity during x-ray scattering. , 2012, The Review of scientific instruments.

[22]  Mark A. Ratner,et al.  ION TRANSPORT IN SOLVENT-FREE POLYMERS. , 1988 .

[23]  G. He,et al.  Imidazolium-functionalized polysulfone hydroxide exchange membranes for potential applications in alkaline membrane direct alcohol fuel cells , 2012 .

[24]  Marc A. Hillmyer,et al.  Highly Selective Polymer Electrolyte Membranes from Reactive Block Polymers , 2009 .

[25]  Manabu Tanaka,et al.  Anion conductive block poly(arylene ether)s: synthesis, properties, and application in alkaline fuel cells. , 2011, Journal of the American Chemical Society.

[26]  Y. Elabd,et al.  Block Copolymers for Fuel Cells , 2011 .

[27]  J. Richard,et al.  Formation and stability of N-heterocyclic carbenes in water: the carbon acid pKa of imidazolium cations in aqueous solution. , 2004, Journal of the American Chemical Society.

[28]  Zhongwei Chen,et al.  A soluble and highly conductive ionomer for high-performance hydroxide exchange membrane fuel cells. , 2009, Angewandte Chemie.

[29]  Dc Kitty Nijmeijer,et al.  Anion exchange membranes for alkaline fuel cells: A review , 2011 .

[30]  Wei Li,et al.  Synthesis and characterization of novel anion exchange membranes based on imidazolium-type ionic liquid for alkaline fuel cells , 2010 .

[31]  F. Yan,et al.  A Soluble and Conductive Polyfluorene Ionomer with Pendant Imidazolium Groups for Alkaline Fuel Cell Applications , 2011 .

[32]  K. Miyatake,et al.  Synthesis and properties of sulfonated block copolymers having fluorenyl groups for fuel-cell applications. , 2009, ACS applied materials & interfaces.

[33]  W. Herrmann,et al.  N-Heterocyclic Carbenes†‡ , 1997 .

[34]  Steven Holdcroft,et al.  A stable hydroxide-conducting polymer. , 2012, Journal of the American Chemical Society.

[35]  A. Zhu,et al.  Anion exchange membranes based on quaternized polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene for direct methanol alkaline fuel cells , 2010 .

[36]  Jing Pan,et al.  Designing advanced alkaline polymer electrolytes for fuel cell applications. , 2012, Accounts of chemical research.