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Rechargeable aqueous zinc-ion batteries have been considered as ap romising candidate for next-generation batteries.H owever,t he formation of zinc dendrites are the most severe problems limiting their practical applications.T od evelop stable zinc metal anodes,asynergistic method is presented that combines the Cu-Zn solid solution interface on ac opper mesh skeleton with good zinc affinity and ap olyacrylamide electrolyte additive to modify the zinc anode,whichcan greatly reduce the overpotential of the zinc nucleation and increase the stability of zinc deposition. The as-prepared zinc anodes show adendrite-free plating/stripping behavior over awide range of current densities.T he symmetric cell using this dendrite-free anode can be cycled for more than 280 hw ith av ery lowv oltage hysteresis (93.1 mV) at ad ischarged epth of 80 %. The high capacity retention and low polarization are also realized in Zn/MnO 2 full cells.Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

In this work, a novel electrocatalyst, Mn 0.3 Ce 0.7 O 2 , with relatively high power performance has been, for the first time, proposed for metal/air batteries. The as-prepared samples are well characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), inductively coupled plasma (ICP) and nitrogen sorption experiments. Meanwhile, electrocatalytic activity towards the reduction of oxygen of Mn 0.3 Ce 0.7 O 2 is compared with those of the pure MnO 2 and CeO 2 . It is observed that the Mn 0.3 Ce 0.7 O 2 solid solution is well formed after the calcination. Electrochemical results show that Mn 0.3 Ce 0.7 O 2 exhibits much higher electrocatalytic activity in the oxygen reduction reaction (ORR) than pure MnO 2 under high discharge current density, which is probably attributed to the effective activation of molecular oxygen over the Mn 0.3 Ce 0.7 O 2 solid solution and higher surface area.

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