Zinc-electrowinning in Zn(II)-NH₄Cl-H₂O systems has many advantages, such as a high current efficiency and insensitivity to F⁻, Cl⁻ and metallic impurities. Additives in electrowinning are important because they influence the growth and structure of the resulting deposits and current efficiency. The effect of gelatin and polyoxyethylene ether (PEO) on the nucleation, growth mechanism, and morphology of samples are investigated through cathodic polarization, chronoamperometry, X-ray diffraction (XRD), and scanning electron microscopy (SEM) analyses during the electrowinning of Zn from an ammonium solution. The fraction-temperature diagram shows that the dominant species is ZnNH₃Cl₃⁻ in the 5 M NH₄Cl electrolyte when the temperature is between 298 K and 373 K. The average current efficiency reaches 95.48% in samples containing both gelatin and PEO. The surface morphology of samples with both gelatin and PEO is basically free of dendrites and shows a dense, layer-by-layer, stacked structure. The preferred growth orientation of zinc is enhanced by the presence of PEO and gelatin. The reduction kinetics of zinc are inhibited by the addition of gelatin. In the presence of gelatin and PEO, Zn nucleation and growth can be explained by the 3D growth characteristics of zinc nuclei under diffusion-limited nucleation. The arrangement and size of zinc grains are characterized through front and cross-section SEM.

锌电解在锌（II）-NH ₄氯-H _2个O系统具有许多优点，如高的电流效率和不敏感性至F ^- ，氯^-和金属杂质。电沉积中的添加剂很重要，因为它们会影响所得沉积物的生长和结构以及电流效率。通过锌极化，计时电流法，X射线衍射（XRD）和扫描电子显微镜（SEM）分析研究了锌的电积锌过程中明胶和聚氧乙烯醚（PEO）对样品成核，生长机理和形态的影响从铵溶液中提取。馏分-温度图表明，优势种是ZnNH ₃氯₃ ^-当温度介于298 K和373 K之间时，在5 M NH ₄ Cl电解质中的电流会降低。同时含有明胶和PEO的样品的平均电流效率达到95.48％。既有明胶又有PEO的样品的表面形态基本没有枝晶，并显示出致密的逐层堆叠结构。锌的优选生长取向通过PEO和明胶的存在得以增强。锌的还原动力学受到明胶添加的抑制。在明胶和PEO的存在下，Zn的形核和生长可以通过扩散受限的形核下锌核的3D生长特征来解释。锌晶粒的排列和大小通过正面和横截面SEM进行表征。