Zinc-ion batteries (ZIBs) have faced persistent challenges related to dendrite growth and the hydrogen evolution reaction (HER). Herein, a metal-organic framework (MOF) polycrystalline membrane is introduced into the realm of ZIB research, motivated by the remarkable separation capabilities exhibited by MOF membranes. A MOF polycrystalline membrane is constructed on the Zn anode through liquid-phase epitaxial growth at room temperature. Aberration-corrected scanning transmission electron microscopy (AC-STEM) analysis unequivocally verifies the ingress of Zn into the MOF cavities, subsequently leading to the reconstitution of the solvation sheath. Profiting from the close contact between the membrane and the Zn anode, the Zn are reduced to Zn directly in the cavities of the MOF after entering. This behavior effectively regulates the deposition trajectory of Zn and eliminates the potential for secondary solvation. Leveraging the efficient separation and ion-confinement capabilities of the MOF, the Zn anode incorporating the metal-azolate framework-4 (MAF-4) membrane demonstrates notable inhibition of the HER and suppression of dendrite formation.

中文翻译：

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通过液相外延生长在锌金属阳极上制备 MOF 多晶膜


锌离子电池（ZIB）一直面临与枝晶生长和析氢反应（HER）相关的持续挑战。在此，由于MOF膜表现出卓越的分离能力，金属有机骨架（MOF）多晶膜被引入ZIB研究领域。在室温下通过液相外延生长在 Zn 阳极上构建 MOF 多晶膜。像差校正扫描透射电子显微镜 (AC-STEM) 分析明确验证了 Zn 进入 MOF 空腔，随后导致溶剂化鞘的重构。得益于膜与Zn阳极之间的紧密接触，Zn进入MOF的空腔后直接被还原为Zn。这种行为有效地调节了锌的沉积轨迹并消除了二次溶剂化的可能性。利用 MOF 的高效分离和离子限制能力，结合金属偶氮骨架 4 (MAF-4) 膜的 Zn 阳极表现出对 HER 的显着抑制和枝晶形成的抑制。