Facet‐Termination Promoted Uniform Zn (100) Deposition for High‐Stable Zinc‐Ion Batteries

Abstract

Reversibility, usually evaluated by Coulombic efficiency (CE) and limited by dendrite growth, has become the major roadblock toward the widespread commercialization of zincion batteries. Tailoring the Zn deposition behavior is vital to prevent dendrite growth. In this work, the facet‐terminator serine is introduced to modulate the interface and obstruct the rampant growth of the Zn (100) plane. The serine cation (Ser+) is revealed to preferentially adsorb onto the electrode/electrolyte interface, suppressing the interfacial parasitic reaction. Theoretical analysis and postmortem/operando experimental techniques indicate that the Ser+ bestows (100)‐dominated morphology to zinc anodes, enabling a highly reversible and dendrite‐free Zn anode. These features endow the Zn anode with a long cyclic life of more than 800 h for Zn//Zn batteries and a high average Coulombic efficiency of 99.8% at 5 mA cm−2 and 5 mAh cm−2 for Zn//Cu batteries. When assembling with commercial V2O5, the full battery delivers a high capacity of 345.1 mAh g−1 at 5 A g−1 with a retention of 74.1% over 2000 cycles.

Tailoring the Solvation Environment Enables Dendrite-Free Zn Anodes for Stable Zinc-Ion Batteries

“…As shown in Figure e and Figure S1, the measured initial Zn nucleation overpotentials in the pure ZnSO 4 electrolyte are 29, 49, 64, and 99 mV at the current densities of 0.2, 0.5, 1, and 2 mA cm –2 , respectively. After introducing HDF, the Zn nucleation overpotentials increase to 67, 85, 92, and 110 mV, indicating the obstructed secondary nucleation, which can lure the uniform Zn deposition . Besides, the distinct Zn deposition behavior can also be demonstrated by chronoamperometric (CA) characterization under the fixed potential of −150 mV.…”

“…After introducing HDF, the Zn nucleation overpotentials increase to 67, 85, 92, and 110 mV, indicating the obstructed secondary nucleation, which can lure the uniform Zn deposition. 37 Besides, the distinct Zn deposition behavior can also be demonstrated by chronoamperometric (CA) characterization under the fixed potential of −150 mV. As shown in Figure 1f, the current substantially increases within 300 s in the ZnSO 4 electrolyte, indicative of the simultaneously increased electrochemically active surface between the electrolyte and the Zn anode accompanied by rampant planar 2D diffusion, 38 while in the HDF/ZnSO 4 electrolyte, the current slightly increases within 130 s and then remains constant, revealing the stable 3D diffusion and smooth deposition surface.…”

Solvation configuration and interfacial chemistry regulation via a bio-based Cyrene additive for highly reversible zinc anodes

“…3g). 14,21,27–30,36,41,47,50–57 Table S1† summarizes the cost, addition amount, and cyclability for previously reported organic solvent-regulated Zn anodes. Note that the cyclability achieved by adding only 2% Cyrene surpassed almost all previously reported organic solvent research.…”

Unveiling the Potential of the Alkyl Chain of Isoleucine for Regulating the Electrical Double Layer and Enhancing the Zinc-Ion Battery Performance

“…By comparison to other amino acid additives reported for ZIB electrolytes, it is evident that the enhancement of reversibility at the zinc anode by ILE, a nonpolar amino acid, is remarkably pronounced (Figure 3b and Table S2 of the Supporting Information). [32][33][34][35][36][37][38][39][40][41]55,56 Although ILE lacks additional electron-donating groups compared to other amino acids and does not exhibit a distinct advantage in terms of its affinity for zinc metal, it still achieves superior optimization effects compared to other amino acids. This is primarily attributed to the unique local hydrophobicity introduced by the alkyl chain.…”