Lithium-ion batteries (LIBs) have led to the success of portable electronics and gained a great deal of attention as energy storage systems for emerging applications such as wearable devices, electric vehicles and robots. However, current LIBs technology reaches its technological limits for increasing their energy densities. To solve this issue, much research effort has been devoted to finding high capacity electrode materials to replace currently used materials such as graphite anode in LIBs. Silicon-based materials are regarded as one of the most promising candidates for anodes because of their high capacities. However, huge volume expansion/contraction of Si during cycling leads to drastic capacity degradation. Recently, porous silicon materials have been revealed to reduce the volume change of Si due to their porous structure, thus showing outstanding electrochemical performances. However, their use in LIBs suffers from the complicated and limited routes for their synthesis. In this presentation, we represent porous Si materials prepared by scalable and nontoxic wet etching process. This materials synthesis concept presented herein represents a means of improving the electrochemical properties of porous Si anode materials for use in commercial LIBs.