کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
195560 459817 2007 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Study of PEMFC ionomers through model molecules mimicking the ionomer repeat units
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Study of PEMFC ionomers through model molecules mimicking the ionomer repeat units
چکیده انگلیسی

The thermal and electrochemical behaviours of PEMFC ionomers based on an aromatic backbone i.e., sulfonated polysulfones, sulfonated polyetheretherketones and sulfonated polybenzimidazoles, were investigated through their model molecules. Thermal degradation was characterized by weight losses and allowed inferring ionomer thermal degradations by chain breakings that cannot be detected by thermogravimetric analysis. In addition, cyclic voltammetry was used to characterize the electroactivity of some ionomers, related to their backbone and their ionic moieties. The use of model molecules is thus a useful tool for assessing both the thermal and electrochemical stability of ionomers. Lastly, due to the high concentrations used in liquid electrolytes as compared with an electrode/membrane interface it may be considered as an electrochemical aging test.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 52, Issue 28, 1 November 2007, Pages 7953–7963
نویسندگان
, , , , ,