Chitosan Modified by Polymeric Reactive Dyes Containing Quanternary Ammonium Groups as a Novel Anion Exchange Membrane for Alkaline Fuel Cells

摘要

A new type of anion exchange membranes based on Chitosan (CTS) modified by polymeric reactivedyes containing quanternary ammonium groups (PRDQA) has been prepared and evaluated as OH conducting polymer electrolytes. The effect of the content of PRDQA on membrane OH conductivityand water uptake was studied using AC impedance technique and weighing method, respectively.FTIR and SEM were used for chemical and structural characterization of the membranes. The-3 -1 CTS/PRDQA membrane (1:0.5 in mass) exhibited a high OH conductivity of 8.1710 S cm at room temperature. At a current density of 57.4mA cm , this membrane achieved a power density of 29.1mW cm with an open-circuit voltage (OCV) of 991.6mV in a H2/O2 system. Compared to thepristine CTS membrane, this membrane also demonstrated a good stability after one week testing ino the 8.0M of KOH solution at 80 C in terms of both integrity and OH conductivity.