Composite plasma polymerized sulfonated polystyrene membrane for \PEMFC\

By Bhabesh Kumar Nath and Aziz Khan and Joyanti Chutia
Published in Materials Research Bulletin NULL 2015

Abstract

This work presents the introduction of an organic compound methyl methane sulfonate (MMS) for the first time in fabrication of polystyrene based proton exchange membrane (PEM) by plasma polymerization process. The membrane is fabricated by co-polymerizing styrene and \MMS\ in capacitively coupled continuous \RF\ plasma. The chemical composition of the plasma polymerized polymer membrane is investigated using Fourier Transform Infrared Spectroscopy which reveals the formation of composite structure of styrene and MMS. The surface morphology studied using \AFM\ and \SEM\ depicts the effect of higher partial pressure of \MMS\ on surface topography of the membrane. The proton transport property of the membrane studied using electrochemical impedance spectroscopy shows the achievement of maximum proton conductivity of 0.141 S cm?1 which is comparable to Nafion 117 membrane. Fuel cell performance test of the synthesized membrane shows a maximum power density of 500 mW cm?2 and current density of 0.62 A cm?2 at 0.6 V.

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