Enhancement of Cyclic Stability of Si Anode by Employing Plasma Treatment and Ti Adhesion Layer

摘要

This study examined the possibility of employing methods of enhancing the interface strength (plasma treatment and adhesion layer) to improve the cyclic stability of Si thin film anode for Li ion batteries. While the effects were somewhat limited when each of the two methods were separately adopted, combining both the methods brought about a remarkable improvement in cyclic stability with the capacity remaining around 3200 mAh/g up to 50 cycles. In addition, materials analysis on the tested samples disclosed the details of morphology and microstructure evolutions that the anode material experienced during charging cycles.