Building a Better Redox Flow Battery - Innovative Diagnostics to Visualise Reactant Transport
In this contribution, a simple and low cost methodology to study the mass transport processes in RFBs is presented. This approach relies on the instantaneous electrochemiluminescence of Luminol. By simply recording the emitted light with a low cost camera,(4) concentration profiles at the surface of the electrode were obtained presenting high temporal and spatial resolutions. In addition, modifications on the electrolyte formulation and flow rate permitted identifying turbulent flow areas located at the turn of the flow field (Fig. 1) as well as leading to the design of improved components.
(1) Wang et al., Journal of Power Sources, 157, 181–187 (2006).
(2) Tsushima et al., Magnetic Resonance Imaging, 23, 255-258 (2005).
(3) Trabold et al., International Journal of Heat and Mass Transfer, 49, 4712–4720 (2006).