For instance, after 30 cycles, the Si15% electrodes have a charge capacity between 30% and 60%. In comparison, the Si8% formulation electrodes present 60%-80% charge capacity, improved when calendered to 45% porosity. It appears that the graphite content for the Si15% electrode is insufficient to improve the electrochemical performance considerably. Therefore, a porosity between 46% to 57% may probably lead to acceptable but insufficient cycling performance. This result could indicate that other parameters need to be considered to improve the cycle life when using higher contents of silicon, such as engineering the matrix electrode structure to contain the silicon cycling problematics when incrementing its content.