电流密度对锌-铟合金电镀层性能的影响  

Effect of current density on properties of electroplated Zn-In alloy coating

作　　者：李洋 邹忠利[1] 米志娟 单玺畅 LI Yang;ZOU Zhongli;MI Zhijuan;SHAN Xichang(College of Materials Science and Engineering,North Minzu University,Yinchuan 750021,China)

机构地区：[1]北方民族大学材料科学与工程学院,宁夏银川750021

出　　处：《电镀与涂饰》2024年第1期16-23,共8页Electroplating & Finishing

基　　金：宁夏回族自治区自然科学基金(2023AAC03265);北方民族大学研究生创新项目(YCX23116)。

摘　　要：[目的]目前水系锌离子电池负极面临许多挑战。在锌基体表面沉积金属层可为其提供保护屏障,起到抑制析氢、提高耐蚀性、改善力学性能等作用。[方法]采用酸性电镀液在金属锌表面制备了Zn–In合金,镀液配方为:ZnSO_(4)·7H_(2)O 40 g/L,In_(2)(SO_(4))310 g/L,EDTA(乙二胺四乙酸)40 g/L,C_(6)H_(5)K_(3)O_(7)25 g/L,Na_(2)SO_(4)15 g/L,添加剂适量。研究了电流密度对Zn–In合金镀层耐蚀性、微观形貌和显微硬度的影响。[结果]电流密度为0.6 A/dm^(2)时所得Zn–In合金镀层表面均匀、平整且致密,耐蚀性最佳,显微硬度也较高。能谱(EDS)和X射线光电子谱(XPS)分析结果表明,所得的镀层主要由Zn、In及其氧化物组成。[结论]在锌箔表面电镀Zn–In合金可提高其耐蚀性和表面品质,有望扩宽其在水系锌离子电池方面的应用。[Introduction]The zinc anode of aqueous zinc-ion battery is confronted with many challenges.One of the efficient methods to improve the performance of zinc anode is electroplating,since the metal coating electroplated on its surface acts as an protective barrier,inhibiting the hydrogen evolution during the electroplating and improving the corrosion resistance and mechanical properties.[Method]Zn-In alloy coating was electroplated on the surface of zinc substrate in an acidic bath comprising ZnSO_(4)·7H_(2)O 40 g/L,In_(2)(SO_(4))310 g/L,EDTA(ethylenediaminetetraacetic acid)40 g/L,C_(6)H_(5)K_(3)O_(7)25 g/L,Na_(2)SO_(4)15 g/L,and additive as required.The effect of electroplating current density on the corrosion resistance,morphology,and microhardness of Zn-In alloy coating was studied.[Result]The Zn-In alloy coating electroplated at a current density of 0.6 A/dm^(2)was uniform,level,and compact with the best corrosion resistance and relatively high microhardness.The analysis results of energy-dispersive spectroscopy(EDS)and X-ray photoelectron spectroscopy(XPS)indicated that the coating primarily composed of Zn,In,and their oxides.[Conclusion]The Zn-In alloy electroplating process can improve the corrosion resistance and surface quality of zinc foil,and is promisingly applied in manufacturing of aqueous zinc-ion batteries.

关 键 词：锌-铟合金 电镀 电流密度 耐蚀性 微观形貌 显微硬度 成分 

分 类 号：TQ153.2[化学工程—电化学工业] O646[理学—物理化学]