Zn anodes in aqueous batteries suffer from severe electrochemical corrosion and dendrite growth which impedes the lifespan of aqueous Zn ion batteries (AZIBs). Protective layers with crystallized coatings have been widely employed to restrain dendrites. However, the high-rate performances of batteries are permanently restricted by sluggish diffusion kinetics of Zn in highly crystallized materials due to the steric hindrance by lattice. Herein, the amorphous metal-organic framework (aMOF) of ATMP-Zr (AZ) with sufficient unsaturated ligands and ion transference sites was employed as smart artificial SEI, which was proved to be the shielding layer to suppress side reactions. The micropores in AZ serve as a sieve to achieve desolvation of [Zn(HO)] and contribute to the re-regulation of Zn flux, negative-charged character plays as smart ion selective layers, high Zn affinity and dangling bonds (-POH or -PO) help to realize high ion transference. The above advantages work synergistically to achieve dendrite-free Zn deposition. Consequently, the AZ-Zn symmetric cells can operate steadily at a high current density of 10 mA cm with a cumulative plating capacity of 4500 mAh cm. The AZ-Zn/MVO full cells deliver prominent electrochemical reversibility. This work provides a unique understanding of designing artificial SEI for long-life-span and high-rate AZIBs.

中文翻译：

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非晶MOF作为智能人造固体/电解质界面，用于高度稳定的锌离子电池


水系电池中的锌阳极会遭受严重的电化学腐蚀和枝晶生长，从而阻碍水系锌离子电池（AZIB）的使用寿命。具有结晶涂层的保护层已被广泛用于抑制枝晶。然而，由于晶格的空间阻碍，电池的高倍率性能永久地受到高度结晶材料中锌的缓慢扩散动力学的限制。在此，具有足够不饱和配体和离子转移位点的ATMP-Zr（AZ）的非晶金属有机骨架（aMOF）被用作智能人工SEI，其被证明是抑制副反应的屏蔽层。 AZ 中的微孔充当筛子，实现 [Zn(H2O)] 的去溶剂化，并有助于重新调节 Zn 通量，带负电的特性充当智能离子选择性层，高 Zn 亲和力和悬挂键（-POH 或-PO)有助于实现高离子迁移率。上述优点协同作用，实现无枝晶锌沉积。因此，AZ-Zn对称电池可以在10 mA cm的高电流密度下稳定运行，累积电镀容量为4500 mAh cm。 AZ-Zn/MVO 全电池具有出色的电化学可逆性。这项工作为设计长寿命和高速率 AZIB 的人工 SEI 提供了独特的理解。