Improved electrochemical performance of SiO-based anode by N, P binary doped carbon coating

Silicon monoxide (SiO), a prospective anode candidate for lithium-ion batteries (LIBs), has drawn the extensive attention of many researchers. In this work, we coated nitrogen, phosphorus (N, P) binary doped carbon onto the surface of SiO by homogeneous mixing gelatin, melamine, phosphate and SiO along with subsequent pyrolysis. Higher electronic conductivity and lithium-ion diffusion coefficient obtained by the synergistic effect of the N, P binary doping, make the modified SiO-based anode exhibit preferable electrochemical performance. Specifically, the as-prepared anode material delivered a reversible capacity of 1223 mAh g−1 at 100 mA g−1, and had capacity retention of 98% after 200 cycles at 1000 mA g−1, while the raw SiO only retained 14%. This work will be committed to providing a possible method of preparing a practical anode material for high-performance lithium-ion batteries.