Abstract
Aqueous zinc-ion batteries (ZIBs) face critical challenges such as interfacial side reactions, corrosion, and passivation of the zinc anode. In this work, we introduce a novel zinc anode featuring a 3D ordered macroporous (3DOM) architecture based on a missing-linker ZIF-8 framework (Zn@Fc-ZIF-8). This innovative design achieves remarkable stability, maintaining performance for over 4000 h at a current density of 0.25 mA cm−2 in a symmetric cell-over 30 times longer than a bare Zn anode. Additionally, by integrating carbon nanotubes (CNTs) within the 3DOM Fc-ZIF-8 skeleton to create a highly conductive network (3DOM Fc-ZIF-8/CNTs), we extend the anode's lifetime to 1500 h at a high current density of 5 mA cm−2. The strategic regulation of the ZIF-8 structure using ferrocene formic acid (Fc) and the incorporation of CNTs result in a full cell with the bi-functional Zn@Fc-ZIF-8/CNTs anode, achieving a high specific capacity of 380.5 mAh g−1 and a coulombic efficiency (CE) of 99.8 %. These findings underscore the significant potential of MOF-based anodes in addressing dendrite formation and advancing the practical application of ZIBs.
Published Version
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