Storing fluctuating and delivering stable electric power supply are central issues when using energy from solar plants or wind power stations. Here, efficient and flexible energy storage systems need to accommodate for fluctuations in energy gain. Scientists from the Leibniz Institute for Interactive Materials (DWI), RWTH Aachen University and Hanyang University in Seoul now significantly improved a key component for the development of new energy storage systems.
Ref: Ultra-High Proton/Vanadium Selectivity for Hydrophobic Polymer Membranes with Intrinsic Nanopores for Redox Flow Battery. Advanced Energy Materials (13 June 2016) | DOI: 10.1002/aenm.201600517
Hydrophobic polymers of intrinsic microporosity (PIM-1) are successfully demonstrated as proton conducting separators in the all-vanadium redox flow battery with the unprecedented infinite proton/vanadium selectivity. A battery fabricated with a nanocomposite comprising a microporous support membrane and nanometer-thick selective PIM layer shows an energy efficiency of up to nearly 99%, while it is also stable during 100 cycles in cyclic performance.