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Owing to their high safety and low-cost, aqueous zince-bromine batteries (AZBBs) are envisioned as being highly applicable in both portable and stationary energy storage. The highly reversible Zn/Zn²⁺ (-0.76 V vs. RHE) and Br^-/Br₂ (1.08 V vs. RHE) redox couples have been employed in Zn-Br₂ flow batteries (1.84 V vs. RHE), although widespread implementation has not been realized. This is largely because parasitic losses in overall battery performance rapidly occur due to i) dendritic growth of Zn deposits during the repetitive discharge process, leading to internal short circuits and ii) the cross-diffusion of highly soluble Br^- (Br₃ ^-) ions causing severe self-discharge and reduced cycle life. Common approaches to mitigate these problems include electrode engineering and incorporating additives and ion-selective membranes into the system for improving cycle life and coulombic efficiency. This talk will …