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Nano-Micro Lett. (2022) 14:82 Page 9 of 13 82 (a) Zn (d) (b) (c) 0 1 cm 2 1 mm kV 9.4 mm x 2.00k LM(UL) (f) 3 μm kV 9.8 mm x 2.00k SE(UL) 20.0 μm 12 μm Zeolite -Zn (g) 350 0 1 cm 2 1 mm 20.0 μm (e) VZn(OH)2 E2(h)ZnO 375 400 Raman Shift (cm-1) 450 Zn2+ Zn Zeolite-Zn 425 10 20 30 40 50 60 70 80 2θ (degree) (h) Zn4(OH)6SO4·H2O Zn Zeolite-Zn Fresh-Zn (i) Zn2+ “Dead” Zn Zn2+ Zn2+ Zn2+ Dendrites Corrosion Zeolite-based coating I3- I- gas H+ Zn2+ Passivation Zn2+ Zn2+ Zn2+ Zn2+ I3- H+ Fig. 3 a, d Photographs, b, e optical micrographs, c, f SEM images, g Raman spectra and h XRD patterns of the bare-Zn and Zeolite-Zn elec- trodes after working for 313 h and 500 h at 2.5 mA cm−2 and 2.5 mAh cm−2 in the symmetric cells, respectively. i Schematical illustration show- ing the protecting effects of the zeolite-based layers because of the dendrite-induced short-circuit failure. Even before failure, the battery had already demonstrated very low CEs (85.9% in average), due to the parasitic reactions including I3− shuttling and Zn corrosion/passivation. On the other hand, the battery with a Zeolite-Zn anode achieves a higher initial capacity of 203.0 mAh g−1 (Fig. 4c), which 13 Raman Intensity (a.u.) Intensity (a.u.)PDF Image | Boosting Zn Battery by Coating a Zeolite‐Based Cation‐Exchange
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