Modification of the Nafion Membrane Using a Chitosan Solution in Carbonic Acid under Pressureстатья
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Дата последнего поиска статьи во внешних источниках: 12 января 2022 г.
Аннотация:Chitosan is a promising biopolymer for coating separation membranes of redox flow batteries. Itsdeposition from a carbonic acid solution under pressure on the Nafion membrane leads to a 1.7-fold reduction in ionic permeability with a slight (6%) decrease in proton conductivity. The discovered effect is a consequence of the penetration of dissolved chitosan molecules under pressure into the membrane owing towhich the homogeneity of the material in the contact area of two polymers increases and, as a consequence,the selectivity of the transport characteristics of the membrane improves. The modified composite separatoris tested in a real redox flow battery and is shown to increase its energy efficiency