Selective permeability of a perfluorosulphonic membrane to different valency cations. Ion-exchange isotherms and kinetic aspects

Ion transport through homogeneous and heterogeneous ion-exchange membranes in single salt and multicomponent electrolyte solutions

“…The most remarkable conclusion is the confirmation that the affinity of both membranes is stronger for Fe 3+ ions than for Na + ions. This result is in agreement with previous literature [18,19], and is probably caused by the higher attractive electrostatic forces existing between the sulfonic acid groups of both membranes and cations of higher charge. However, as the concentration of Na + ions in the electrolyte increases, the ion partition equilibrium of both membranes shows a different evolution.…”

An electrical impedance spectroscopic (EIS) study on transport characteristics of ion-exchange membrane systems

“…Ion-exchange membranes (IEMs) have been widely used in various applications such as diffusion dialysis, electrolysis, eletrodialysis, and fuel cells [1][2][3][4][5][6][7][8][9][10]. At the same time, much attention has been paid to electrochemical characteristics of IEM systems in order to understand complex transport phenomena in IEM systems.…”

Investigation of crossover processes in a unitized bidirectional vanadium/air redox flow battery

“…Logette et al proposed that the diffusion coefficient of cations through a cation exchange membrane is affected by the affinity of the ion for functional groups of the membrane and the mobility within the membrane [58]. Higher valency of the cation results in higher affinity for the membrane and in lower mobility due to stronger electrostatic interaction of the cation with the negative groups of the membrane.…”