Regulating interfacial reaction through electrolyte chemistry enables gradient interphase for low-temperature zinc metal batteries

Abstract In situ formation of a stable interphase layer on zinc surface is an effective solution to suppress dendrite growth. However, the fast transport of bivalent Zn-ions within the solid interlayer remains very challenging. Herein, we engineer the SEI components and enable superior kinetics of Zn metal batteries under harsh conditions through regulating the sequence of interfacial chemical reaction. With the differences in chemical reactivity of trimethyl phosphate co-solvent and trifluoromethanesulfonate anions in the Zn 2+ -solvation shell, Zn 3 (PO 4 ) 2 and ZnF 2 are successively generated on Zn metal surface to form a gradient ZnF 2 –Zn 3 (PO 4 ) 2 interphase. Mechanistic studies reveal the outer ZnF…

• NN
  National Natural Science Foundation of China

  Award: 22105107
• SA
  Science and Technology Commission of Shanghai Municipality

  Award: 21511103300
• YE
  Young Elite Scientists Sponsorship Program by Tianjin
• FR
  Fundamental Research Funds for the Central Universities