Low Cost/ High Performance Ion Exchange Membrane Developed For Vanadium Ion Flow Batteries

Researchers from the Hong Kong University of Science and Technology have recently reported on the performance of a new commercial ion exchange membrane for Vanadium flow batteries. The new composite membrane consists of two layers: a microporous layer and a Nafion layer which is much thinner than conventional membranes made from Nafion only. The new membrane is substantially cheaper than the conventional Nafion membrane and at the same time improve the batter efficiency (71.2% ==> 76.3%) and the electrolyte energy density (54.1% ==> 68.4% electrolyte utilization).