多孔泡沫铜支撑锡薄膜阳极材料的制备及性能

以三维多孔泡沫铜为基底,采用化学镀的方法制备锂离子电池薄膜Sn负极材料.利用扫描电镜、X射线衍射分析以及恒电流充放电测试等手段研究不同厚度薄膜Sn电极的形态、结构和电化学行为.结果表明:化学镀工艺制备的Sn电极表面的大量微孔和岛状突起不仅增大电极的表面积,而且显著缓解电极在充放电过程中体积的变化;其中镀层较薄的样品C薄膜Sn电极的初始充电(脱锂)容量为660.6 mA·h/g,经100次循环后,容量保持在299.5 mA·h/g,具有较好的循环性能.

Synthesis and characteristics of porous Sn thin film on foam copper as anode material

Three-dimensional porous Sn thin film electrodes were prepared by electroless deposition on foam copper. The microstructures and electrochemical performance of the electrodes were discussed by scanning electron microscopy (SEM), X-ray diffractometry (XRD) and charge/discharge measurement. The results demonstrate that the porous framework and micro-holes have a great structure advantage in restricting severe volume changes of Sn thin film electrodes. The initial capacity of the thinner film electrode of sample C is 660.6 mA·h/g. After 100 cycles, the capacity of sample C retains 299.5 mA·h/g, showing good cycle performance.