Angela Mohanty - Systematic Analysis of Cation Stability in Alkaline Exchange Membrane Fuel Cells

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      Publication Details (including relevant citation   information):

         

    Mohanty, A.D. and Bae, C., Systematic Analysis of Cation Stability in Alkaline Exchange Membrane Fuel Cells, ECS Transactions, 2014, 64, 1221

      Abstract:

         

      Improving long-term cation stability in alkaline environment is   crucial for adopting anion exchange   membrane (AEM) fuel cells as a commercially viable technology in   clean energy applications.  To reliably identify the most   stable cation structures, we analyzed the cation stability of   various synthetically prepared quaternary ammonium (QA) organic   molecules via a simple silver oxide ion exchange   reaction.  With this   method we were able to compare the stability of various   structures of QA hydroxide in water without excess alkaline   solution or inconsistencies faced in the presence of polymer   backbones.  By   quantitatively comparing cation degradation via NMR, we were able   to identify several cation structures with greater stability as   compared to the most well-known   benzyltrimethylammonium.  From this study we concluded   that alkyl-substituted cations seem to impart greater stability   than benzylic-substituted cations in the presence of hydroxide   anion in aqueous   solution.

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