RESUMO
Correction for 'Long cyclic stability of acidic aqueous zinc-ion batteries achieved by atomic layer deposition: the effect of the induced orientation growth of the Zn anode' by Zhisen Zeng et al., Nanoscale, 2021, 13, 12223-12232, https://doi.org/10.1039/d1nr02620h.
RESUMO
Aqueous Zn-ion batteries with economical ZnSO4 solution as the electrolyte suffer from a tremendous tendency of dendrite formation under mildly acidic conditions; moreover, utilization of Zn(CF3SO3)2 delivers superior performance, but is expensive. Herein, we optimize the ZnSO4 electrolyte by inducing 50 µL of 10 M sulfuric acid in 10 mL electrolyte, which can achieve long cycle life (1000 h at 0.1 mA cm-2, 300 h at 1 mA cm-2 and 250 h at 10 mA cm-2) when the Zn foil is protected by three metallic oxides deposited by atomic layer deposition (ALD). The nucleation behaviour of the (002) facet has proved to play a critical role in the reversible lifespan. The Al2O3 layer would restrict the stripping procedure, leading to the highest overpotential, while the TiO2 layer and Fe2O3 layer tended to strip all orientations but the (002) facet. Al2O3@Zn demonstrated a preference for a compact hillock-like (101) orientation texture in the deposition procedure, while TiO2@Zn and Fe2O3@Zn were favourable to obtain a smooth terrace texture. Additionally, symmetric cells with Fe2O3@Zn expressed the lowest overpotential (31.64 mV) and minimal voltage hysteresis (23.6 mV) at 1 mA cm-2. A Zn-MnO2 battery with Fe2O3@Zn also displayed superior capacity, which could reach 280 mA h g-1 at a current density of 1 A g-1. The diffusion coefficient of Zn2+ discloses that among the three ALD layers, full cells with Fe2O3@Zn are the most favourable for diffusion of Zn2+ in acidic electrolyte.
