Charge–discharge performances of the Si–O–Al electrodes

The increase of thickness of silicon films as negative electrodes of lithium-ion batteries is known to result in notable worsening their cyclability. Some recently, the authors have shown that the layered composites based on the Si–O–Al system possess much better cyclability. The present work declares that cyclic stability depends also on parameters of galvanostatic cycling. The composite films of thickness 3 μm, composed of 14 wt% of oxygen, 17 wt% of aluminum, and 67 wt% of silicon, deposited in the form of multi-layered structures, are shown to demonstrate a sufficiently high stability over more than 200 charge–discharge cycles with the capacity fading less than 0.09% per cycle if the cycling is performed within the potential range of 0.1–0.7 V relative to the lithium reference electrode.