Homogeneous and three-dimensional structural Cu₆Sn₅ alloy thin-film composite materials are successfully fabricated by efficiently electrodepositing the acidic leaching solution of waste printed circuit boards with the pH value adjusted to 10 at different current densities, which are confirmed by inductive coupled plasma-optical emission spectrometer, scanning electron microscope, and X-ray diffraction. When the Cu₆Sn₅ alloy thin-film composite materials electrodeposited at 5 mA/cm² are employed as anode materials for lithium-ions batteries, the assembled coin cells can deliver initial discharge and charge specific capacity of about 617 and 502 mAh/g at 100 mA/g, respectively, and can retain a discharge specific capacity of 448 mAh/g after 25 cycles. Moreover, the cells assembled with Cu₆Sn₅ alloy anodes can exhibit an enhanced lithium-ion diffusion coefficient of 5.045 × 10⁻¹⁶ cm²/s with a lower transfer resistance of 63.43 Ω. Those results may provide an effective strategy for the resource utilization of low-value wastes into copper‑tin alloy thin-film electrode materials.

通过在不同电流密度下有效地电沉积pH值调节至10的废印刷电路板的酸性浸出液，成功地制备了均质和三维结构的Cu ₆ Sn ₅合金薄膜复合材料。 -光学发射光谱仪，扫描电子显微镜和X射线衍射。当Cu ₆ Sn ₅合金薄膜复合材料以5 mA / cm ²电沉积时作为锂离子电池的负极材料，组装的纽扣电池在100 mA / g时可分别提供约617和502 mAh / g的初始放电和充电比容量，并可以保持448 mAh / g的放电比容量。 25次循环后g。此外，用Cu ₆ Sn ₅合金阳极组装的电池可以表现出增强的锂离子扩散系数5.045×10 ^-16  cm ² / s，传输电阻低至63.43Ω 。这些结果可能为将低价值废物用于铜锡合金薄膜电极材料的资源利用提供有效策略。