A Robust and Tough Composite Hydrogel Electrolyte with Anion‐Locked Supramolecular Network for Zinc Ion Batteries

Abstract Hydrogel electrolytes have garnered extensive attention in zinc ion batteries due to their excellent flexibility and good safety. However, their limited mechanical properties, low ionic conductivity, and poor Zn 2+ transference number pose significant challenges for developing high‐performance zinc ion batteries. Herein, this work constructs a 3D supramolecular network capable of locking anions and active water molecules through the abundant hydrogen bonding interactions between aramid nanofibers, polyvinyl alcohol, and anions. This network synergistically enhances the mechanical properties (with a mechanical strength of 0.88 MPa and a toughness of 3.28 MJ m −3 ), ionic conductivity (4.22 S m −1 ),…

• NN
  National Natural Science Foundation of China

  Award: 22203015
• NK
  National Key Research and Development Program of China

  Award: 2020YFA0710303
• FP
  Fujian Provincial Health Technology Project

  Award: 2024QNA016