The application of a Zn metal anode in aqueous zinc metal batteries (AZMBs) is limited by an unstable interface, which induces well-known dendrite growth and corrosion. In this report, a bionic ion pump interface for a Zn metal anode is proposed and constructed by dynamically assembling acetylated protein (α-HP_ace) (Zn@BIPI/α-HP_ace). The α-HP_ace with abundant amide bonds is preferentially assembled on the fresh Zn metal surface as an interface, due to its strong recognition of Zn²⁺. It is demonstrated by TOF-SIMS that the organic –CONH– and inorganic ZnF₂/ZnS make up the uniformly dispersed section of the interface film, playing the roles of Zn²⁺ transport sites and a dense barrier layer, respectively. Thus, the bionic ion pump interface is not only beneficial for the rapid transport of Zn²⁺ but also effective in preventing aqueous electrolyte erosion. More importantly, the Zn@BIPI/α-HP_ace anode achieves uniform deposition with a predominant orientation of 91% (100) planes. The improved results show that a symmetric cell with a Zn@BIPI/α-HP_ace electrode achieves a long cycle life of over 6000 h, and a full cell with a Zn@BIPI/α-HP_ace anode and NaV₃O₈-1.5H₂O cathode exhibits a high-capacity retention of ∼92% after 5000 cycles at 5 A g⁻¹. This study, in which bionic ion-pump interface engineering is achieved, provides a novel approach to facilitate the practical application of AZMBs.

中文翻译：

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一种动态组装的仿生离子泵接口，适用于高倍率和稳定循环的锌金属电池


锌金属负极在水性锌金属电池 （AZMB） 中的应用受到不稳定界面的限制，这会导致众所周知的枝晶生长和腐蚀。在本报告中，通过动态组装乙酰化蛋白 （α-HP_ace） （Zn@BIPI/α-HP_ace） 提出了和构建了用于 Zn 金属负极的仿生离子泵接口。具有丰富酰胺键的 α-HP_ace 由于对 Zn²⁺ 的强烈识别，因此优先作为界面组装在新 Zn 金属表面上。TOF-SIMS 证明有机 –CONH– 和无机 ZnF₂/ZnS 构成了界面膜的均匀分散部分，分别扮演 Zn²⁺ 传输位点和致密阻挡层的作用。因此，仿生离子泵界面不仅有利于 Zn²⁺ 的快速传输，而且可有效防止电解质水溶液的侵蚀。更重要的是，Zn@BIPI/α-HP_ace 阳极实现了均匀沉积，主要取向为 91% （100） 个平面。改进的结果表明，具有 Zn@BIPI/α-HP_ace 电极的对称电池实现了超过 6000 h 的长循环寿命，而具有 Zn@BIPI/α-HP_ace 阳极和 NaV₃O 8-1.5H ₂O 阴极的全电池在 5 A ^g-1 下循环 5000 次后表现出 ∼92% 的高容量保持率.本研究实现了仿生离子泵界面工程，为促进 AZMBs 的实际应用提供了一种新的方法。