目的 提高电解铜箔深镀粗化效果。方法 采用电沉积对35 μm电解铜箔进行表面处理。通过AFM、SEM、XRD、剥离强度测试、表面粗糙度测试以及循环伏安等分析测试手段，系统地研究了钨酸钠-HEC-SPS复合添加剂对电解铜箔形貌与性能的影响。结果 粗化液中加入钨酸钠-HEC-SPS复合添加剂，可以提高粗化层均匀性和致密性，改善深镀效果，当HEC、SPS和钨酸钠添加量分别为5、50、60 mg/L时，综合深镀处理效果最佳，粗糙度Rz和剥离强度分别为7.50 μm和2.14 N/mm，该性能指标显著优于粗化原液处理试样。复合添加剂促使还原峰电位由?0.644 V负移至?0.674 V，电极极化增强。电沉积速率由33.0 μm/h下降至29.8 μm/h，抑制效果显著。峰顶瘤点形貌由尖刺状向光滑圆润的形貌转变，效果明显改善;同时，粗化层由(111)、(200)晶面显著向(220)晶面择优取向。结论 粗化液中加入钨酸钠-HEC-SPS复合添加剂可以显著提升电解铜箔深镀效果，改善剥离强度及表面粗糙度，并促进晶面向(220)晶面择优取向。

The work aims to enhance the deeply coarsening effect of electrolytic copper foil. The surface treatment of 35 μm electrolytic copper foils was conducted by electro-deposition method, and the influence of sodium tungstate-HEC-SPS composite additive on surface morphology and performance of electrolytic copper foil was systematically studied by AFM, SEM, XRD, peel strength test, surface roughness test and cyclic voltammetry. The sodium tungstate-HEC-SPS composite additive in the coarsening solution promoted the uniformity and compaction of coarsening coating layer, and improved the effect of deep plating. When the additive amounts of HEC, SPS and sodium tungstate were 5, 50, 60 mg/L respectively, the comprehensive deep plating effect was the best and the roughness Rz and peel strength reached 7.504 μm and 2.139 N/mm separately. The performance indicator was better than that in coarsening sample treatment. The composite additive reduced the reductive spike potential from ?0.644 V to ?0.674 V, which significantly enhanced the polarization of the electrode. The rate of electro-deposition decreased from 33 μm/h to 29.8 μm/h, which inhibited the deposition effectively. The surface morphology of the nodule on the peak of copper foil peak turned from spininess into smoothness, and was improved obviously. Meanwhile, the preferential orientation of the copper foil coarsening layer accelerated the orientation from (111) and (200) to (220). Adding the sodium tungstate-HEC-SPS composite additive into coarsening solution can significantly enhance the deep plating effect of electrolytic copper foil, improve the peel strength and surface roughness, and promote the preferred orientation (220).