Dynamical Janus Interface Design for Reversible and Fast-Charging Zinc–Iodine Battery under Extreme Operating Conditions

Aqueous zinc (Zn) iodine (I2) batteries have emerged as viable alternatives to conventional metal-ion batteries. However, undesirable Zn deposition and irreversible iodine conversion during cycling have impeded their progress. To overcome these concerns, we report a dynamical interface design by cation chemistry that improves the reversibility of Zn deposition and four-electron iodine conversion. Due to this design, we demonstrate an excellent Zn-plating/-stripping behavior in Zn||Cu asymmetric cells over 1000 cycles with an average Coulombic efficiency (CE) of 99.95%. Moreover, the Zn||I2 full cells achieve a high-rate capability (217.1 mA h g–1 at 40 A g–1; C rate of 189.5C) at room temperature and enable…

• UD
  U.S. Department of Energy
• GO
  Government of the United Kingdom
• UR
  UK Research and Innovation

  Awards: EP/Y008707/1, 101077226
• RS
  Royal Society

  Awards: IEC/NSFC/201261, RGS/R1/211080
• NN
  National Natural Science Foundation of China

  Awards: 201261, 52303342
• OO
  Office of Energy Efficiency and Renewable Energy
• HE
  HORIZON EUROPE Framework Programme
• EA
  Engineering and Physical Sciences Research Council

  Awards: EP/L015862/1, 101077226, EP/V027433/1, EP/Y008707/1, EP/V027433/3, EP/V027433/2, EP/V027433/3
• SA
  Science and Technology Innovation Plan Of Shanghai Science and Technology Commission

  Award: 22520710100
• VT
  Vehicle Technologies Office
• OO
  Office of Energy Efficiency