One-step synthesis of sulfonated silica-poly(dimethysiloxane) proton exchange membranes for high temperature PEMFC

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고분자 전해질 연료전지에 사용되는 유-무기 복합 전해질막 소재의 개발

MasterFree-standing, flexible and thermally stable membrane, a hybrid of sulfonated silica and poly (dimethylsiloxane) (PDMS) was synthesized for proton exchange membrane fuel cells (PEMFCs) and its properties were analyzed. PDMS was reacted with 3-mercaptopropyl trimethoxysilane (MPTMS) by sol-gel process with acid catalyst. Thiol group (-SH) in MPTMS was oxidized into sulfonic group (-SO3H) during the reaction, which enabled the membrane proton conductible. Reaction conditions and weight ratio of PDMS and MPTMS decided the brittleness of membrane. Ca. 20wt% of MPTMS and more than 48hr of aging time were essential for acquiring free-standing and crackles membrane. Sequence of adding precursors was also crucial to membrane’s properties.As a result, synthesized membrane showed ca. 7.84% of water uptake ability and ca. 0.0424S/cm of proton conductivity (at 60℃, 100% RH.) at most

Preparation and Characterization of BiVO4 Films for Coupling Materials or WO3 Films in Photoelectrochemical Cell

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Composite Electrode of BiVO4/WO3 for Photoelectrochemical water splitting

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Composite Electrodes of BiVO4/WO3 for Photoelectrochemical Cell Application

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