A Direct Methanol Alkaline Fuel Cell Based on Poly(phenylene) Anion Exchange Membranes

Rajeswari Janarthanan, Satyananda Kishore Pilli, James L. Horan, Daniel A. Gamarra, Michael R. Hibbs, Andrew M. Herring
2014 Journal of the Electrochemical Society  
The Investigation of the performance of poly(phenylene) based anion exchange membranes (AEMs) in a direct methanol fuel cell is reported. The fuel cell performances were tested with different anode gas diffusion layers as a function of concentrations of fuel and electrolyte using two commercially available platinum catalysts supported on carbon. Normalized current density values demonstrated good performance for a poly(phenylene) AEM, with a cation consisting of six methylene spacers attached
more » ... a trimethyl ammonium group, with a maximum current density of 11.8 mA cm −2 mg −1 in a KOH free fuel. The platinum catalyst (46%) from Tanaka showed a better performance (10.4 mA cm −2 mg −1 ) compared to the platinum catalyst from E-TEK (5.1 mA cm −2 mg −1 ) in 1M methanol fuel feed under identical conditions. We observed that the MEA with a Zoltek gas diffusion layer on the anode showed the best performance (226 mA cm −2 and 53.8 mW cm −2 ) in the presence of KOH, suggesting that a hydrophilic gas diffusion layer plays a significant role in improving the fuel cell performance. A durability test for a MEA in 1M methanol and 1M KOH for 67 h showed an overall degradation rate of 400 μV h −1 . ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 207.241.231.81 Downloaded on 2018-07-23 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 207.241.231.81 Downloaded on 2018-07-23 to IP
doi:10.1149/2.1041409jes fatcat:pd5mvgvuazc6podw3rqdkkdfbi