Research Information System
Thesis Type: Postgraduate
Institution Of The Thesis: Istanbul University, Institute of Graduate Studies In Sciences, Fen Fakültesi Bölümü, Turkey
Approval Date: 2010
Thesis Language: Turkish
Student: Yavuz Şahin
Principal Supervisor (For Co-Supervisor Theses): Hulusi Kemal Ulutaş
Abstract:
Polyimide membranes, forming by adding ionic liquids in two different mole ratios to
the polyimide-based polymer matrices, are produced as an alternative for commonly
used perflorosülfonik acid (Nafion) membranes. High proton conductivity has been
achieved as a result of sulfuric acid-H2SO4 doping process on polymer electrolytes used
high temperature fuel cells in the literature. Therefore, the increment of the ionic
conductivity of our samples has been obtained by doping acid. Acid-doped and undoped
two types of membrane have been obtained. The frequency, thickness and temperature
dependence of ac conductivity and dielectric constant for all the samples were
investigated.