Secondary Battery Applications of Nanoporous Anion Exchange Membranes with High Permselectivity
발표자
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초록
내용
The high permselectivity is an essential property for separator membranes in secondary battery systems. Membranes should block the cross-over of the redox-active species in each electrode while efficiently transporting charge species through the membrane, which determines the performance and durability of the battery system. Also, the membrane should be low-cost and have high chemical stability. Here, we produced triblock copolymer membranes with cationic-charged functional chains connected to nano-sized pore walls. The uniform nanopores have 3D-continuous morphologies through the polymerization-induced microphase separation (PIMS) methodology. The pore size and functional group density are orthogonally tunable by controlling each block’s length, which gives permselectivity controllability. Also, low-cost hydrocarbon-based polymers have high chemical stability. We studied the applicability of membranes in anion-exchange membrane fuel cells and non-aqueous redox flow batteries.