A porous silicon anode prepared by dealloying a Sr-modified Al-Si eutectic alloy for lithium ion batteries.

Silicon has been considered to be one of the most promising anode materials for next generation lithium ion batteries due to its high theoretical specific capacity. However, its huge volume expansion during the lithiation/delithiation process that can result in rapid capacity fading and low conductivity present significant challenges for application. In this study, the morphology of Si in an Al-Si eutectic alloy was modified by Sr, and porous Si was then produced by dealloying the precursor.