Controllable synthesis Honeycomb‐like structure SiOx/C composites as anode for high-performance lithium-ion batteries

SiOx-based materials have become the most promising anode material of lithium-ion batteries because of their ultra-high theoretical specific capacity, rich in natural resources, environmentally benign, and relatively low working potential. Unfortunately, the tremendous change in the volume of SiOx-based anode during the charging and discharging process will cause damage to the structure and rapid capacity fading, which dramatically hampered the further application of SiOx-based anode materials. The synthesis of SiOx/C composites with a honeycomb‐like structure is an effective way to relieve the volume variation and improve electrochemical performance. Because the composites with superior structural integrity can facilitate the contact of active materials. Besides, the rich pores in this honeycomb‐like structure can not only accommodate the volume expansion but also increase the area between the active materials and electrolyte. As anode materials for lithium-ion batteries, the composites delivered a high reversible capacity of 802 mAh g−1 after 300 cycles at the current density of 200 mA g−1. This simple synthesis method may provide a pathway to further application for SiOx-based anodes of lithium-ion batteries.