Fuel cell catalyst layers containing short-side-chain perfluorosulfonic acid ionomers
نویسندگان
چکیده
منابع مشابه
Molecular modeling of the short-side-chain perfluorosulfonic acid membrane.
Presented here is a first principles based molecular modeling investigation of the possible role of the side chain in effecting proton transfer in the short-side-chain perfluorosulfonic acid fuel cell membrane under minimal hydration conditions. Extensive searches for the global minimum energy structures of fragments of the polymer having two pendant side chains of distinct separation (with che...
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There is a need for polymeric hydrogen/air fuel-cell membranes that can efficiently conduct protons at moderate to high temperatures for wet and dry gas feeds. The US Department of Energy (DOE), for example, set an exceedingly stringent preliminary target for membrane conductivity, 0.10 Scm 1 at 120 8C and 50% relative humidity (RH). Herein, we describe the fabrication and basic properties of o...
متن کاملThe effects of backbone conformation on hydration and proton transfer in the ‘short-side-chain’ perfluorosulfonic acid membrane
Presented here is a first principles based molecular modeling investigation of the effects of conformational changes in the backbone on hydration and proton transfer in the short-side-chain perfluorosulfonic acid fuel cell membrane under minimal hydration conditions. Extensive searches for minimum energy structures (at the B3LYP/6-311G⁎⁎ level) of the two pendant side chain polymeric fragment: ...
متن کاملMesoscale modeling of hydrated morphologies of 3M perfluorosulfonic acid-based fuel cell electrolytes.
Dissipative particle dynamics (DPD) simulations have been carried out to study the hydrated morphology of 3M perfluorosulfonic acid (PFSA) fuel cell membranes as a function of the equivalent weight (EW), molecular weight (MW), and hydration level. The 3M PFSA ionomers were modeled using typical EWs of 578, 640, and 790 g/mol, and molecular weights were varied from about 45,000 to 90,000 g/mol i...
متن کاملProton Transfer in Perfluorosulfonic Acid Fuel Cell Membranes with Differing Pendant Chains and Equivalent Weights.
Proton transfer in the nanoscopic water channels of polyelectrolyte fuel cell membranes was studied using a photoacid, 8-hydroxypyrene-1,3,6-trisulfonic acid sodium salt (HPTS), in the channels. The local environment of the probe was determined using 8-methoxypyrene-1,3,6-trisulfonic acid sodium salt (MPTS), which is not a photoacid. Three fully hydrated membranes, Nafion (DuPont) and two 3M me...
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ژورنال
عنوان ژورنال: Journal of Power Sources
سال: 2011
ISSN: 0378-7753
DOI: 10.1016/j.jpowsour.2010.06.050