Accession Number : ADA527882


Title :   Polyarylenethioethersulfone Membranes for Fuel Cells (Postprint)


Descriptive Note : Interim rept. 1 Jan -1 May 2007


Corporate Author : AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH ELECTROCHEMISTRY AND THERMAL SCIENCES BRANCH


Personal Author(s) : Rodrigues, S J ; Reitz, T L ; Dang, T D ; Bai, Z ; Bardua, K


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a527882.pdf


Report Date : Jan 2010


Pagination or Media Count : 11


Abstract : High-performance sulfonated polyarylenethioethersulfone (SPTES) polymers have been developed as membranes for fuel cells. These high-molecular-weight polymers synthesized by a polycondensation process have an aromatic backbone along with high sulfonic acid content that provides for their high conductivity and robust mechanical properties. Bulky phenyl-based endcapping agents are incorporated into the system to maintain high water stability and retain high proton conductivity. Films with good mechanical properties were obtained by solvent casting. SPTES polymer systems with a 50% degree of sulfonation (SPTES-50) exhibited high proton conductivity (100 mS/cm) at 65 ?C and 85% relative humidity. Membrane electrode assemblies (MEAs) fabricated using SPTES-50 electrolytes that incorporate conventional electrode application techniques have shown high proton mobility. Electrochemical evaluation was performed using nonlinear regression analysis to obtain Tafel parameters.


Descriptors :   *FUEL CELLS , *ELECTROCHEMISTRY , *SULFONIC ACIDS , *POLYMERS , PROTONS , REGRESSION ANALYSIS , ELECTRODES , AROMATIC COMPOUNDS , NONLINEAR ANALYSIS , COMPOSITION(PROPERTY) , MOLECULAR WEIGHT , WATER , CONDUCTIVITY , TEST AND EVALUATION , MECHANICAL PROPERTIES


Subject Categories : Inorganic Chemistry
      Polymer Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE