1572
Polyaromatic Ionomers for High Performance Alkaline Membrane Fuel Cells

Tuesday, 2 October 2018: 10:40
Star 4/5 (Sunrise Center)
S. Maurya (Los Alamos National Laboratory), I. Matanovic (University of New Mexico), H. T. Chung (Los Alamos National Laboratory), E. J. Park (Rensselaer Polytechnic Institute), C. W. Narvaez Villarrubia (Los Alamos National Laboratory), S. Noh, J. Han, C. Bae (Rensselaer Polytechnic Institute), C. Fujimoto, M. Hibbs (Sandia National Laboratory), and Y. S. Kim (Los Alamos National Laboratory)
Quaternized polyaromatics are one of the promising polymer electrolytes for alkaline membrane fuel cells (AMFCs) as these materials have good hydroxide conductivity, mechanical properties, and processibility.1 In this presentation, we present how the molecular design of quaternized polyaromatic ionomers has been evolved from quaternized poly(arylene ether sulfone)s to quaternized poly(phenylene oxide)s to quaternized aryl-ether free poly(phenylene)s to quaternized poly(fluorene)s. The major driving force to design quaternized polyaromatics includes polymer backbone stability,2 tethered cationic group stability,3 and minimum ionomer interaction with hydrogen oxidation catalysts4,5. Improved quaternized polyaromatic based AMFCs from < 200 mW cm-2 peak power density to 1500 mW cm-2 peak power density will be demonstrated. Remaining challenges of polyaromatic based AMFCs including AMFC durability, implementing low-PGM or non-PGM catalysts will be briefly discussed.

References

  1. Dongwon Shin, Chulsung Bae, Yu Seung Kim, Chapter 8. Anion Exchange Membranes: Stability and Synthetic Approach, in The Chemistry of Membranes Used in Fuel Cells: Degradation and Stabilization, Ed. Shulamith Schlick, John Wiley & Sons, Inc. (2018).
  2. Cy Fujimoto, Dae-Sik Kim, Michael Hibbs, Debra Wrobleski, Yu Seung Kim, Memb. Sci. 423-424, 438-449 (2012).
  3. Yoong-Kee, Choe, Cy Fujimoto, Kwan-Soo Lee, Luke T. Dalton, Kathy Ayers, Neil J. Henson, Yu Seung Kim, Mater. 26, 5675-5682 (2014).
  4. Hoon Taek, Chung, Ulises Martinez, Ivana Matanovic, Yu Seung Kim, Phys. Chem. Lett. 7, 4464-4469 (2016).
  5. Ivana Matanovic, Hoon Taek Chung, Yu Seung Kim, Phys. Chem. Lett. 8, 4918-4924 (2017).
See more of: E-2.2 Membranes for Alkaline Devices 2
See more of: I01E: Polymer Electrolyte Fuel Cells and Electrolyzers 18 (PEFC&E 18) - Materials for Alkaline Fuel Cells and Direct-Fuel Fuel Cells
See more of: Fuel Cells, Electrolyzers, and Energy Conversion
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