【摘要】 采用恒电压方法得到了不同电解质浓度和电压下金属锌二维电沉积生长的形貌分布图.在枝晶生长条件下,研究了支持电解质、全氟表面活性剂和脉冲电压等对锌枝晶生长行为的影响,并检测了电解池中Zn2+的浓度分布.实验结果表明:支持电解质、表面活性剂和脉冲电压改变了阴极附近的电场分布和Zn2+的浓度分布,对沉积物形貌产生很大的影响.同时发现,Zn2+仅通过电迁移作用到达阴极附近,扩散对传质的贡献可忽略不计.更多还原

【Abstract】 The diagram of morphologies for zinc growth under different ZnSO₄ concentration and different cell voltage was measured in the quasi-two-dimensional electrodeposition. Under the condition of dendritic growth, the influences of support electrolyte, surfactant and pulse potential on the morphology and growth behavior of zinc have been studied. Meantime the concentration distribution of Zn²⁺ in the thin electrolytic cell was also measured. The results indicate that the support electrolyte, surfactant and pulse potential can remarkably change morphologies of zinc growth by changing the distribution of Zn²⁺ concentration and electric field around the cathode. In addition, It is found that the transmission of Zn²⁺ is only realized by electromigration, and the contribution of diffusion can be neglected.更多还原