Morphology study of electrodeposited zinc from zinc sulfate solutions as anode for zinc-air and zinc-carbon batteries

The morphology of zinc (zn) deposits was investigated as anode for aqueous batteries. the zn was deposited from zinc sulfate solution in direct current conditions on a copper surface at different current densities. the morphology characterization of zn deposits was performed via field emission scanning electron microscopy. the zn deposits transformed from a dense and compact structure to dendritic form with increasing current density. the electrodeposition of zn with a current density of 0.02 a cm2 exhibited good morphology with a high charge efficiency that reached up to 95.2%. the zn deposits were applied as the anode in zinc–air and zinc–carbon batteries, which gave specific discharge capacities of 460 and 300 ma h g1, respectively.