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Dr. Junhua Wang, Prof. Dr. Shuang Gu, Robert B. Kaspar, Bingzi Zhang and Prof. Dr. Yushan Yan Stabilizing the Imidazolium Cation in Hydroxide-Exchange Membranes for Fuel Cells ChemSusChem 6

Version of Record online: 22 AUG 2013 | DOI: 10.1002/cssc.201300285

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Stable and able: The hydroxide-conducting cationic functional group used in the hydroxide-exchange membranes of fuel cells is key to controlling chemical stability and solubility. A new imidazolium cation, 1,4,5-trimethyl-2-(2,4,6-trimethoxyphenyl)imidazolium, is designed to take advantage of both strong electron-donation properties and steric hindrance. Synergy between these two effects leads to an efficient hydroxide-exchange membrane, with increased alkaline stability and improved OH conductivity.

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