“…The second group of methods includes the design of the membrane matrix: tuning the size of conductive channels via the hydrophilicity/hydrophobicity of functional groups, crosslinking and the polymer nature [ 38 , 40 , 41 , 42 , 43 , 44 , 45 ]. Finally, the third group of methods located at the intersection of organic and inorganic chemistry includes the design of various hybrid and composite materials [ 46 , 47 , 48 , 49 , 50 , 51 , 52 ].…”