Uncovering ionic conductivity impact towards high power vanadium flow battery design and operation
By Song, Yuxi; Li, Xiangrong; Yan, Chuanwei; Tang, Ao
Published in Journal of Power Sources
Journal of Power Sources
2020
Abstract
High power output and efficient charge-discharge operation are deemed to be the pivotal for technological development of vanadium flow batteries. Due to large polarizations however, cycling efficiency is still to a great extent limited in high-power commercialized stacks adopting the conventional flow-through design. To facilitate an in-depth understanding of polarizations and realize a high-power and efficient operation, polarization analyses are performed in this study on a flow-through design based vanadium flow cell. Combined experimental and calculated results show that under the investigated testing conditions, the ohmic polarization dominates the cell polarization across 20