In situ construction of bamboo charcoal derived SiOx embedded in hierarchical porous carbon framework as stable anode material for superior lithium storage

[Display omitted] •·low-cost SiOx/C composites are in situ controllable constructed from commercial bamboo charcoal.•·Composite possess a well-reserved porous and hierarchical structure.•·It exhibits high capacity with good cyclic stability in half/full LIBs. Ongoing pursuit of high performance functional materials from natural and inexpensive resources receive continuous attention. 3D porous SiOx/C composites are constructed only from commercial bamboo charcoal via an in situ top-down synthetic route involving activated carbonization and mild aluminothermic reduction. Particularly, the obtained composites possess a well-reserved porous and hierarchical structure where SiOx nanoparticles are embedded in the entire 3D carbon framework. When used as the active material for lithium-ion battery anode, the optimized SC-3 sample achieves the impressive specific capacity (1100 mA h g−1) at 200 mA g−1 after 300 cycles, as well as prominent cyclic stability under 1 A g−1 (700 mA h g−1 after 200 cycles). Besides, this SiOx/C anode demonstrates perfect capacity retentions and superior cyclic stability in full cells. This low cost bamboo-derived composite can further broaden the vision of advancing new-generation anode materials for rechargeable batteries and the related hierarchical composites.