Highly Compact Zinc Metal Anode and Wide‐Temperature Aqueous Electrolyte Enabled by Acetamide Additives for Deep Cycling Zn Batteries

Abstract Rechargeable aqueous zinc (Zn) batteries are a promising candidate for large‐scale energy storage, but the noncompact and dendritic Zn deposition, water‐induced parasitic reaction, and narrow operating temperature range severely hinder their practical application. Here, it is demonstrated that these challenges can be conquered by introducing low‐cost acetamide (Ace) into aqueous electrolytes. The non‐sacrificial Ace molecules with both donor and acceptor groups can disrupt the original H‐bonded network of water, replace the solvating‐H 2 O in Zn 2+ ‐solvation sheath, form dynamic adsorption on Zn, and create an H 2 O‐poor electrical double‐layer. Consequently, the presence of Ace suppresses water…

• CA
  China Association for Science and Technology

  Award: 2021QNRC001
• NN
  National Natural Science Foundation of China

  Awards: 22075067, 22379038
• DO
  Department of Education of Hebei Province

  Award: JZX2024015
• NS
  Natural Science Foundation of Hebei Province

  Awards: B2023201108, B2020201001