Encapsulated Red Phosphorus in rGO-C3N4 Architecture as Extending-Life Anode Materials for Lithium-Ion Batteries.

Red phosphorus, a promising anode candidate for lithium ion batteries, draws wide attention owing to its high theoretical capacity, high abundance in earth as well as environmental benignity. However, its poor electrical conductivity and large volumetric changes during the charge-discharge process hinders its practical application. A novel phosphorus composite framed by reduced graphene oxide-C₃N₄ (rGO-C₃N₄) and cost-effective red phosphorus is proposed in the study. P–N and P–C chemical bonds between the red phosphorus and rGO-C₃N₄ framework facilitate to construct a robust architecture with admirable interface interconnection for stable mechanical structure and continuous Li ion/electron diffusion tunnels. Excellent electrochemical performance is demonstrated. The red phosphorus/rGO-C₃N₄ composite maintains a reversible capacity of 1032.6 mAh g⁻¹ with a high coulombic efficiency of approximately 99.0% after 600 cycles. [ABSTRACT FROM AUTHOR]