Rechargeable aqueous zinc-ion batteries possess the merits of good environmental benignity, high operational safety and high-energy density. Nevertheless, the practical application of zinc-ion batteries are severely obstructed by the inhomogeneous...

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Zn-ion batteries are re-evaluated as a potential choice to address the safety issue and cost concerns of current energy storage systems. Unfortunately, further application is severely hindered by low coulombic efficiency and poor cycle life, which are caused by the undesirable dendrite growth and side reactions on metal Zn anode. Herein, ethylenediaminetetraacetic acid (EDTA) is employed as an electrolyte additive to solve the problem. The functional groups of EDTA adsorption layer on Zn foil results in refined grains by providing abundant nucleation sites for initial deposition and further induces uniform and flat Zn deposition without dendrites. Moreover, the chelation of EDTA with Zn 2+ changes the coordination environment of hydrated Zn 2+ and suppresses the side reactions. The smooth deposition of Zn endows the Zn anodes with super stability in both symmetric cells and Zn−V 2 O 5 full cells. This work provides a simple and feasible approach for solving anode issues in high-performance and safe Zn-ion batteries.

Carbonated beverages are widely enjoyed in spare time, yet there remain many physical and chemical processes clouded at the molecular level. In this report, we employ molecular dynamics simulations to estimate the diffusion coefficients of CO and the molecular origin of its variations in three model systems with characteristic features of champagnes, sugar-based cola drinks, and club sodas. The computed diffusion coefficients of CO are in good agreement with experimental data. Analyses of hydrogen bonding and the solvent's structural and dynamic properties reveal that the change of CO diffusion coefficient is closely associated with the diffusional behavior of the solvent water itself, as a result of changes in the number and strength of hydrogen bonding interactions among the species and solvent.

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