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Abstract The rapid development of electric vehicles necessitates high‐energy density Li‐ion batteries for extended range. Silicon is a promising alternative to graphite anodes due to its high capacity; however, its substantial volume expansion during cycling leads to continuous growth of the solid electrolyte interphase and significant capacity fading. This study addresses these issues by designing a porous Si structure combined with a double carbon‐species coating layer, induced by low interfacial energy in a scalable process. Carbon and graphene are located on Si surfaces, forming a close interface that maintains electrical contact, suppresses lithium consumption, and enhances charge transfer properties. The composite anode with a double carbon‐species coating on Si demonstrates rapid stabilization with increasing coulombic efficiency, achieving a specific capacity of 1,814 mAh g −1 at 0.2 C and a high‐rate capability of 1,356 mAh g −1 at 10 C. Additionally, in a full‐cell configuration with LiFePO 4 , it recorded a specific capacity of 161 mAh g −1 at 0.2 C. These results show the potential of porous Si with a carbon‐graphene coating for stable, high‐capacity operation in Li‐ion batteries, offering new insights into high‐performance electrochemical systems. Moreover, the double carbon‐species coating derived from a scalable surface chemistry‐based process presents a realistic alternative for industrial applications.
Lim et al. (Tue,) studied this question.