Copper powder is prepared by electrolysis, and additives Sodium dodecyl benzene sulfonate (SDBS) and polyvinyl pyrrolidone (PVP) are added to the electrolyte. Through the synergy effect of the two additives, the shielding effect between metal atoms is enhanced, and as a consequence the microscopic morphology is changed and it the powder performance is improved. Scanning electron microscopy (SEM), x-ray diffraction (XRD) and Electrochemical Impedance Spectroscopy (EIS) are used to characterize the copper powder. The results show that when the content of SDBS and PVP is 5 g l⁻¹ and 1.5g l⁻¹ respectively, the new type of thin and long dendrite copper powder can be obtained by electrolysis.

电解制备铜粉，在电解液中加入添加剂十二烷基苯磺酸钠（SDBS）和聚乙烯吡咯烷酮（PVP）。通过两种添加剂的协同作用，增强了金属原子之间的屏蔽作用，从而改变了微观形貌，提高了粉末性能。使用扫描电子显微镜 (SEM)、X 射线衍射 (XRD) 和电化学阻抗谱 (EIS) 来表征铜粉。结果表明，当SDBS和PVP的含量分别为5gl ^-1和1.5gl ^{-1 时}，电解可得到新型细长枝晶铜粉。