Altering the Zn 2+ Migration Mechanism Enables the Composite Hydrogel Electrolytes with High Zn 2+ Conduction and Superior Anti‐Dehydration

Abstract Hydrogel electrolytes are favored for flexible zinc‐ion batteries (FZIBs) due to their biocompatibility. Their application progress, however, is severely restricted by the poor water retention and low Zn 2+ transference number (t Zn 2+ ). Herein, one composite polymer electrolyte (CPE) is prepared by introducing Prussian blues (PBs) as multifunctional fillers in polyvinyl alcohol (PVA) matrix to enhance t Zn 2+ . Experimental and theoretical characterizations confirm that the PB filler can alter the Zn 2+ migration mechanism and trap water of CPE. PBs as active fillers can provide extra zinc ions and unique 3D ion diffusion channels. Moreover, the metal centers in PB framework that function as the…

• NN
  National Natural Science Foundation of China

  Award: 22309209
• NS
  Natural Science Foundation of Hunan Province

  Award: 2023JJ40709