Artificial Solid-Electrolyte Interface Facilitating Dendrite-Free Zinc Metal Anodes via Nanowetting Effect,ACS Applied Materials & Interfaces

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Artificial Solid-Electrolyte Interface Facilitating Dendrite-Free Zinc Metal Anodes via Nanowetting Effect
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-08-13 00:00:00 , DOI: 10.1021/acsami.9b11243
Mingqiang Liu ₁ , Luyi Yang ₁ , Hao Liu ₁ , Anna Amine ₁ , Qinghe Zhao ₁ , Yongli Song ₁ , Jinlong Yang ₁ , Ke Wang ₁ , Feng Pan ₁

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The formation of dendrites on a zinc (Zn) metal anode has limited its practical applications on aqueous batteries. Herein, an artificial composite protective layer consisting of nanosized metal–organic frameworks (MOFs) to improve the poor wetting effect of aqueous electrolytes on the Zn anode is proposed to reconstruct the Zn/electrolyte interface. In this layer, hydrophilic MOF nanoparticles serve as interconnecting electrolyte reservoirs enabling nanolevel wetting effect as well as regulating an electrolyte flux on Zn anode. This zincophilic interface exhibits significantly reduced charge-transfer resistance. As a result, stable and dendrite-free Zn plating/stripping cycling performance is achieved for over 500 cycles. In addition, especially at higher C-rates, the coating layer significantly reduces the overpotentials in a Zn/MnO₂ aqueous battery during cycling. The proposed principle and method in this work demonstrate an effective way to reconstruct a stable interface on metal anodes (e.g., Zn) where a conventional solid-electrolyte interface (SEI) cannot be formed.

中文翻译：

人造固体电解质界面通过纳米润湿效应促进无枝晶的锌金属阳极

在锌（Zn）金属阳极上形成树枝状晶体限制了其在水性电池上的实际应用。在此，提出了一种由纳米金属-有机骨架（MOF）组成的人工复合保护层，以改善水性电解质对Zn阳极的不良润湿效果，从而重建Zn /电解质界面。在这一层中，亲水性MOF纳米颗粒用作互连的电解质储层，可实现纳米级的润湿效果并调节Zn阳极上的电解质通量。该嗜锌界面表现出显着降低的电荷转移阻力。结果，经过500个以上的循环，可以获得稳定且无枝晶的Zn镀层/剥离循环性能。此外，特别是在较高的C速率下，涂层大大降低了Zn / MnO中的过电势循环期间使用_2个水性电池。这项工作中提出的原理和方法证明了一种有效的方法，可以在无法形成常规固体电解质界面（SEI）的金属阳极（例如Zn）上重建稳定的界面。

更新日期：2019-08-13

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