Introducing Cobaltocenium to Alkaline Anion Exchange Membrane Fuel Cells (AAEMFC)


Haomiao Yuan


Haomiao Yuan, E Bryan Coughlin

Author Affiliation: 

Department of Polymer Science and Engineering, University of Massachusetts Amherst


Cobaltocenium derivatives are good candidates for alkaline anion exchange membrane (AAEM) because of their excellent thermal, alkaline and electro-chemical stabilities under fuel cell operational conditions. However, there has not yet been an efficient method incorporate cobaltocenium cation into polymers that possess alkaline stable structures Here, cobaltocenium-containing monomers with different chemical structures were synthesized. The carbon-carbon bond linkages between cobaltocenium and polymerizable olefin ensure alkaline and thermal stabilities. Monomers were copolymerized with comonomers to afford amphiphilic polymers with precisely controlled ion exchange capacities over a wide range. Different polymer architectures were prepared such as random copolymer, block copolymer and crosslinked networks. The polymers were fabricated into thin robust membranes. The solvent processibility of the non-crosslinked membranes shows a great advantage during membrane fabrication. The ion conductivity of these membranes were measured and showed promising results for use as alkaline anion exchange membrane fuel cell applications.