Electrospinning was used to create custom-made fibrous electrode materials for redox flow batteries with targeted structural properties. The aim was to increase the available surface area for electrochemical reaction without diminishing the transport properties of the electrode. Electrospinning conditions were identified that could produce fibers several times larger than those typically yielded by the technique (shown in the right column), yet much smaller than in commercially available electrodes (shown in the left column). The produced material performed markedly better than a commercially available material. Further optimizations such as improved consistency in the production and some surface activation treatments could provide significant advancements, and the members of PMEAL continue to tackle this problem.
This was has been accepted in the Journal of the Electrochemical Society and a link to the article can be found on the publications page.