Polycation‐Regulated Electrolyte and Interfacial Electric Fields for Stable Zinc Metal Batteries

Abstract Zn metal as one of promising anode materials for aqueous batteries but suffers from disreputable dendrite growth, grievous hydrogen evolution and corrosion. Here, a polycation additive, polydiallyl dimethylammonium chloride (PDD), is introduced to achieve long‐term and highly reversible Zn plating/stripping. Specifically, the PDD can simultaneously regulate the electric fields of electrolyte and Zn/electrolyte interface to improve Zn 2+ migration behaviors and guide dominant Zn (002) deposition, which is veritably detected by Zeta potential, Kelvin probe force microscopy and scanning electrochemical microscopy. Moreover, PDD also creates a positive charge‐rich protective outer layer and a N‐rich…

• NN
  National Natural Science Foundation of China

  Awards: 52073137, 51763018, 202204
• NS
  Natural Science Foundation of Jiangxi Province

  Awards: 20224ACB204006, 20203BDH80W011
• JN
  Jiangxi Normal University

  Award: KFSEMC-202204