Highly Reversible Aqueous Zinc Batteries enabled by Zincophilic-Zincophobic Interfacial Layers and Interrupted Hydrogen-Bond Electrolytes. Academic Article uri icon


  • Aqueous Zn batteries promise high energy density but suffer from Zn dendritic growth and poor low-temperature performance. Here, we overcome both challenges by using an eutectic 7.6m ZnCl2 aqueous electrolyte with 0.05m SnCl2 additive, which in situ forms a zincophilic/zincophobic Sn/Zn5 (OH)8 Cl2 H2 O bilayer interphase and enables low temperature operation. Zincophilic Sn decreases Zn plating/stripping overpotential and promotes uniform Zn plating, while zincophobic Zn5 (OH)8 Cl2 H2 O top-layer suppresses Zn dendrite growth. The eutectic electrolyte has a high ionic conductivity of 0.8mScm-1 even at -70C due to the distortion of hydrogen bond network by solvated Zn2+ and Cl- . The eutectic electrolyte enables ZnTi half-cell a high Coulombic efficiency (CE) of >99.7% for 200 cycles and ZnZn cell steady charge/discharge for 500h with a low overpotential of 8mV at 3mAcm-2 . Practically, ZnVOPO4 batteries maintain >95% capacity with a CE of >99.9% for 200 cycles at -50C, and retain 30% capacity at -70C of that at 20C.

published proceedings

  • Angew Chem Int Ed Engl

altmetric score

  • 0.75

author list (cited authors)

  • Cao, L., Li, D., Soto, F. A., Ponce, V., Zhang, B., Ma, L. u., ... Wang, C.

citation count

  • 36

complete list of authors

  • Cao, Longsheng||Li, Dan||Soto, Fernando A||Ponce, Victor||Zhang, Bao||Ma, Lu||Deng, Tao||Seminario, Jorge M||Hu, Enyuan||Yang, Xiao-Qing||Balbuena, Perla B||Wang, Chunsheng

publication date

  • August 2021