Despite the high safety and low-cost of aqueous zinc-bromide batteries (AZBBs), their widespread application in portable and stationary energy storage systems is hindered by deleterious zinc-dendrite growth and cross-diffusion of tribromide (Br₃⁻) ions. Here, we, for the first time demonstrate the effect of Lorentz force using internal magnets to retain the reversible capacity for mitigated cross-diffusion of Br₃⁻, dendrite-free zinc deposition, enhanced cycle life, improved voltage efficiency and energy efficiency of AZBBs via magnetohydrodynamics. Of the magnetic field strengths investigated (0 – 70 ± 1 mT), cells incorporating 50 ± 1 mT achieved a high energy efficiency of 88.8 % (coulombic efficiency of 99.3 %) with a small decay of 7.6 % after 550 cycles. Interestingly, batteries with internal magnets resist self-discharge and exhibit an improved rate-capability (up to 3C rate) compared to batteries without magnets. Scanning electron microscopy images and energy dispersive X-ray analysis of zinc electrodes (after 100 cycles) of AZBBs containing 50 ± 1 mT revealed the suppressed amount of cross-diffused bromine and dendrite-free zinc deposits without any passivation layer. Operando UV–vis spectroscopic data of membrane electrode assembly (MEA) of AZBB confirmed the retention of Br₃⁻ ions at 50 ± 1 mT, whereas the MEA without magnets suffered severe leaching of Br₃⁻ ions into the electrolyte.

尽管水性溴化锌电池 (AZBB) 具有高安全性和低成本，但它们在便携式和固定式储能系统中的广泛应用受到有害的锌枝晶生长和三溴化物 (Br 3 - ) 离子的交叉扩散_的^阻碍。在这里，我们首次证明洛伦兹力的影响使用内部磁铁来保持可逆容量以减轻 Br _{3的交叉扩散}^-，无枝晶锌沉积，通过磁流体动力学提高循环寿命，提高 AZBB 的电压效率和能量效率。在研究的磁场强度 (0 – 70 ± 1 mT) 中，包含 50 ± 1 mT 的电池实现了 88.8% 的高能量效率（库仑效率为 99.3%），在 550 次循环后衰减为 7.6%。有趣的是，与没有磁铁的电池相比，带有内部磁铁的电池可以抵抗自放电并表现出更高的倍率能力（高达 3C 倍率）。包含 50 ± 1 mT 的 AZBB 的锌电极（100 次循环后）的扫描电子显微镜图像和能量色散 X 射线分析表明，交叉扩散的溴和无枝晶锌沉积物的数量受到抑制，没有任何钝化层。₃ ^-离子在 50 ± 1 mT，而没有磁铁的 MEA 遭受 Br ₃ ^-离子严重浸出到电解质中。