A Multiscale Flow Battery Modeling Approach Using Mass Transfer Coefficients

A novel multiscale flow battery simulation approach is presented. Therefore, the mass transfer coefficient (MTC) extracted from 3D-resolved microscale simulations, transferred to homogenized cell scale and compared empirical formulations literature. The models are parameterized with an organic system experimentally validated on microscale. It resolves real geometry of electrode microstructure obtained by experimental image reconstruction microtomography. accounts for flow, mass, coupled charge transport using Butler–Volmer kinetics. suitable study power density as a function concentration, velocity, discharge rate. MTC under transfer-limiting operating conditions. Bulk surface concentrations active material reaction rate used. 2D cell-scale model considers half-cell single species reduced order reaction. implemented state (SOC) distinctive specific initial concentration used calculate evolving in investigated parameter study. based velocity. can be shown that one magnitude higher depends significantly SOC.