Covalent Anchoring of Mechanical Polymer for Highly Stable Zinc Metal Batteries

• DOI: 10.1002/adma.202500596
• Publication Date: 2025-03-12T04:44:10Z
• Authors: Yanyan Wang; Wenyong Chen; Fengmei Wang; Xinjie Li; Zihao Zhang; Wei Li; Fei Wang
• Keywords: Anchoring

Abstract Artificial interfacial protective coatings (IPCs) on Zn anodes provide a viable solution for suppressing dendritic growth by spatially confining and homogenizing the 2+ flux. However, repeated deformation during electroplating/stripping cycles can lead to rupture or exfoliation of IPCs, as well formation detrimental gaps. Herein, highly durable IPC is developed substrate using mechanically robust fluorinated polyimide nanofilm (FPI). This unique FPI interphase forms strong covalent bonds with through electronegative fluorine atoms, facilitating plating/stripping while maintaining adhesion. The superior resilience, modulus, low creep film resist impact stresses from electroplated Zn, ensuring structural integrity. With this coating, FPI‐Cu||Zn half cells demonstrate high reversibility in over 4000 h, Coulombic efficiency above 99.33%. When coupled MnO 2 cathode, ||FPI‐Zn full exhibit long lifespan, surpassing 5000 cycles, specific capacity retention 75.21%. study highlights importance achieving balance between customized compatibility mechanical properties IPCs modulate zinc chemistries.