A Facile Route to Synthesize Silicon‐Doped Biomass Waste Orange Peel‐Derived Carbon for Lithium‐Ion Batteries

Developing high‐performance and low‐cost anode materials for lithium‐ion batteries remains a key challenge. Biomass‐derived carbons offer environmental and resource advantages over traditional graphite, yet their electrochemical performance still requires improvement. In this study, a Si‐doped biomass‐derived carbon (Si‐OCP‐Carbon) was prepared using waste orange peel as the precursor through a facile carbon bath method that operates without the need for a protective atmosphere. Structural analyses show that Si is uniformly distributed within the amorphous carbon matrix, accompanied by an enlarged interlayer spacing and a modified pore structure resulting from SiOC bonding. Electrochemical measurements demonstrate that the Si‐OCP‐Carbon anode delivers an initial discharge capacity of 1266 mAh g ⁻¹ at 0.1 A g ⁻¹ and maintains 566.8 mAh g ⁻¹ after 200 cycles, markedly outperforming the undoped counterpart. It also exhibits stable rate performance and capacity recovery. The proposed carbon bath approach provides an energy‐efficient and environmentally benign route for converting biomass waste into functional carbon materials and offers a useful strategy for designing biomass‐derived carbon anodes for lithium‐ion batteries.