Tandem Chemistry with Janus Mesopores Accelerator for Efficient Aqueous Batteries

A reliable solid electrolyte interphase (SEI) on the metallic Zn anode is imperative for stable Zn-based aqueous batteries. However, the incompatible Zn-ion reduction processes, scilicet simultaneous adsorption (capture) and desolvation (repulsion) of Zn2+(H2O)6, raise kinetics and stability challenges for the design of SEI. Here, we demonstrate a tandem chemistry strategy to decouple and accelerate the concurrent adsorption and desolvation processes of the Zn2+ cluster at the inner Helmholtz layer. An electrochemically assembled perforative mesopore SiO2 interphase with tandem hydrophilic −OH and hydrophobic −F groups serves as a Janus mesopores accelerator to boost a fast and stable Zn2+ reduction reaction.…

• NN
  National Natural Science Foundation of China

  Awards: 22309031, 22109029, 22279023
• QU
  Qatar University

  Award: QUHI-CAS-21/22-1
• NK
  National Key Research and Development Program of China

  Award: 2022YFA1503501