Commercial applications of aqueous Zn batteries primarily encounter challenges related to surface corrosion and dendrite formation. In this study, a hydrophobic polysilane layer functionalized with −CF3 groups (CF3-PSiOX) is tailored for Zn anode through a two-step process involving self-assembly and condensation. The CF3-PSiOX layer functions as a protective barrier, effectively isolating water and inhibiting corrosion. Moreover, the primary interactions between −CF3 and Zn2+ guides the diffusion and deposition processes of Zn2+ while optimizing the de-solvation process, ultimately resulting in dendrite inhibition. Hence, cells with CF3-PSiOX layer boasts a high Coulombic efficiency (∼99.8 % after 1500 cycles), a long lifespan (over 2400 h), and optimized capacity retention (73.3 % over 1000 cycles). The self-assembled polysilane layer with customizable groups offers a novel approach for tuning the interface properties of Zn anodes and establishes a general principle for interface adjustment applicable to alternative metallic electrodes.

中文翻译：

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面向高度可逆锌电化学的自组装聚硅烷人工固体电解质界面层


水性 Zn 电池的商业应用主要遇到与表面腐蚀和枝晶形成相关的挑战。在这项研究中，通过涉及自组装和缩合的两步过程，为 Zn 负极定制了用 −CF3 基团官能化的疏水性聚硅烷层 （CF3-PSiOX）。CF3-PSiOX 层起到保护屏障的作用，有效隔离水和抑制腐蚀。此外，−CF3 和 Zn2+ 之间的主要相互作用指导 Zn2+ 的扩散和沉积过程，同时优化脱溶剂化过程，最终导致枝晶抑制。因此，具有 CF3-PSiOX 层的电池具有高库仑效率（1500 次循环后 ∼99.8%）、长寿命（超过 2400 小时）和优化的容量保持率（1000 次循环中 73.3%）。具有可定制基团的自组装聚硅烷层为调整 Zn 阳极的界面特性提供了一种新颖的方法，并建立了适用于替代金属电极的界面调整的一般原则。