Eni S.p.a.

Keti Vezzu'

Vito Di Noto

Chiara Gambaro

Chuanyu Sun

Laura Meda

A zipped ion-exchange membrane (Z-IEM) having at least one cation-exchange polyelectrolyte (CEP) crosslinked with at least one anion-exchange polyelectrolyte (AEP), wherein the CEP has a molar fraction of positive charges (x) so that: (i) when x=0.5, the Z-IEM is a completely neutralized ion-exchange membrane; (ii) when x>0.5, the Z-IEM is a cation-conducting ion-exchange membrane; (iii) when x<0.5, the Z-IEM is an anion-conducting ion-exchange membrane. The above zipped ion-exchange membrane (Z-IEM): (i) is based on a polymeric matrix; (ii) is endowed with a high conductivity for ionic species such as either HO, OHor halides such as F, Cl, Br, and I; and (iii) is able to block as much as possible the crossover of other ionic species, such as: cations such as V, V, VO, VO, Fe, Fe, Cr, Cr, Ce, Ce, Ti, Ti, Mn, Mn, Zn, Pb, Np, Np, NpO, NpO, Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba; and anions such as F, BF, Cl, ClO, ClO, ClO, ClO, Br, Br, I, I.

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Padua, Italy

Keti Vezzu'