fig7

Figure 7. (A) Zn dendrite growth accompanied by H₂ evolution in 1 M Zn(TFSI)₂ electrolyte and (B) SEI-regulated uniform Zn deposition in ZES electrolyte. Scanning electron microscopy (SEM) images of Zn deposits using (C) 1 M Zn(TFSI)₂ and (D) ZES electrolytes at 1 mA cm^-2 (0.5 mAh cm^-2). (E) Three-dimensional (3D) distributions of Zn, N, F, and S elements in the SEI, obtained from time-of-flight secondary ion mass spectrometry (TOF-SIMS) sputtered volumes. (F) In situ optical microscopy observations of Zn deposition in Zn/Zn cells, showing the Zn-electrolyte interface in ZES. Zn/V₂O₅ cells in 1 M Zn(TFSI)₂ using (G) a pristine Zn anode and (H) an SEI-coated Zn anode were first fully charged to 1.8 V at 20 mA g^-1 (based on the cathode active material), respectively. (A-H) Reproduced with permission from^[85]. Copyright 2019, The Author(s).