The development of aqueous zinc‐ion batteries (AZIBs) for large‐scale industrial applications is substantially constrained by the persistent issue of zinc anode corrosion. This study introduces fucoidan (FCD), a corrosion inhibitor, to effectively mitigate the corrosion‐related challenges in zinc metal anodes. FCD forms a robust, covalently bonded layer on the zinc surface at a low concentration of 25 mm through interactions between the lone pairs on its polar atoms and the d orbitals of zinc. This layer is ultrathin, which does not deteriorate ion transfer but effectively shields the zinc from corrosive electrolytes and promotes uniform zinc deposition, resulting in suppressed corrosion, passivation, and dendrite formation. Consequently, the Zn||Zn cells exhibit excellent reversibility, stably operating for 2700 h at 1 mA cm−2 under 1 mAh cm−2 and 400 h at 10 mA cm−2 under 10 mAh cm−2. Furthermore, a large‐sized Zn||I2 pouch cell with a high iodine loading of 2 g and a discharge capacity of ≈300 mAh is demonstrated, which shows minimal capacity degradation—<3% after 300 cycles—and maintains a high Coulombic efficiency of ≈99.5%. The corrosion inhibition strategy proposed in this study provides crucial insights for enhancing the durability and practicability of AZIBs.

中文翻译：

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通过有效耐用的缓蚀剂抑制锌金属腐蚀，实现稳定的水性锌电池


用于大规模工业应用的水性锌离子电池 （AZIB） 的开发受到持续存在的锌阳极腐蚀问题的严重制约。本研究介绍了岩藻糖胶 （FCD），一种缓蚀剂，可有效缓解锌金属阳极中与腐蚀相关的挑战。FCD 通过其极性原子上的孤对电子与锌的 d 轨道之间的相互作用，以 25 mm 的低浓度在锌表面形成坚固的共价键合层。该层是超薄的，不会破坏离子转移，但可以有效地保护锌免受腐蚀性电解质的影响，并促进锌的均匀沉积，从而抑制腐蚀、钝化和枝晶形成。因此，Zn||Zn 电池表现出优异的可逆性，在 1 mA cm-2 下 1 mAh cm-2 下稳定运行 2700 小时，在 10 mAh cm-2 下稳定运行 400 小时，在 10 mAh cm-2 下稳定运行。此外，大型 Zn||证明 I2 软包电池具有 2 g 的高碘负载量和 ≈300 mAh 的放电容量，其容量衰减最小（300 次循环后 <3%），并保持 ≈99.5% 的高库仑效率。本研究提出的腐蚀抑制策略为提高 AZIBs 的耐久性和实用性提供了重要的见解。