Rechargeable redox flow batteries: Maximum current density with electrolyte flow reactant penetration in a serpentine flow structure
Abstract
Rechargeable redox flow batteries with serpentine flow field designs have been demonstrated to deliver higher current density and power density in medium and large-scale stationary energy storage applications. Nevertheless, the fundamental mechanisms involved with improved current density in flow batteries with flow field designs have not been understood. Here we report a maximum current density concept associated with stoichiometric availability of electrolyte reactant flow penetration through the porous electrode that can be achieved in a flow battery system with a "zero-gap"serpentine flow field architecture. This concept can explain a higher current density achieved within allowing reactions of all species soluble in the electrolyte. Further validations with experimental data are confirmed by an example of a vanadium flow battery with a serpentine flow structure over carbon paper electrode.
Keywords
Cite
@article{arxiv.1704.00744,
title = {Rechargeable redox flow batteries: Maximum current density with electrolyte flow reactant penetration in a serpentine flow structure},
author = {Xinyou Ke and Joseph M. Prahl and J. Iwan D. Alexander and Robert F. Savinell},
journal= {arXiv preprint arXiv:1704.00744},
year = {2017}
}