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P/Se@C composites were configured with multiple bonding interface consisting of highly P/Se heterogeneous structure and admirable P C, Se C bonding to achieve outstanding pseudocapacitive effect and fast lithium-ion/electron diffustion. [Display omitted] Due to its large capacity in theory, red phosphorus (RP) has become a viable anode choice for lithium-ion batteries (LIBs), but because of its inherent attributes, for instance, substantial volume expansion during cycling, which causes capacity degradation and electrode pulverization, it is difficult to use in real applications. To address these challenges, this study investigates the modification of red phosphorus-based electrodes through P/Se heterointerface engineering and conductive network design. The theoretical calculation shows that the introduction of selenium reduces the band gap of P/Se. While forming the P/Se heterogeneous interface enhances the cyclic stability of the composites, it simultaneously boosts the surface pseudocapacitive effect of the materials. The introduction of activated carbon builds an admirable conductive network. The resulting composite electrode, denoted as P/Se@C, exhibits promising electrochemical performance. After 800 cycles, P/Se@C composite retains a stable capacity of 541.1 mAh/g at 200 mA g−1. Furthermore, even after 1500 cycles, P/Se@C composite retains a capacity of 408.3 mAh/g at 1000 mA g−1. [ABSTRACT FROM AUTHOR]

Graphite carbon for lithium-ion batteries (LIBs) has received extensive attention due to the strong stability and moderate working potential. In spite of these advantages, the intrinsic low theoretical capacity and the poor interface compatibility severely restrict the practical application of graphite carbon. Herein, a rational strategy to improve lithium storage performance of carbon derived from metal organic frameworks (MOFs) is constructively employed by decorating with red phosphorus. Because of the unique structure and properties, nickel MOFs-derived micro flower carbon matrix can not only provide more active sites for lithium storage, but also facilitate the performance of red phosphorus sites. Furthermore, the carbon decorated with red phosphorus (P/Ni@C) are tightly anchored by P-O-C bonds to provide a guarantee for the synergistic effect. The P/Ni@C anode delivers a high discharge capacity of 1184.6 mAh g−1 over 400 cycles at 200 mA g−1 and high-rate capacity of 686.8 mAh g−1 at 2000 mA g−1, which demonstrate excellent cyclic stability and charge transfer kinetics, respectively. [Display omitted] [ABSTRACT FROM AUTHOR]

An unconventional spheric quasi-SEI film is strategically configured on cost-effective red phosphorus. Highly activated surface with weakened P P bond strength and strengthened binding force increase the electrode integration. [Display omitted] • A method for moderate phosphorylation and etching of phosphorus surface. • An unconventionally spheric quasi-SEI film forms before lithiating progress. • Balls change from solid core–shell structure to hollow core–shell sphere structure. • Highly activated surface with weakened P P bond strength. • Highly activated surface strengthened binding force of PVdF. Solid electrolyte interface (SEI) film is the most important separation layer between nonaqueous electrolytes and anodes to protect anode from corrosion and maintain continuous ionic diffusion tunnels. However, SEI film, especially for high-capacity anode materials, is still confined to continuous and stable ionic conductive layer despite the conventional SEI film is intrinsically poor to resist against the drastic volumetric changes of active centers. Herein, an unconventional spheric quasi-SEI film is thus strategically configured on cost-effective red phosphorus electrode materials by moderate phosphorylation combined with pore-forming process. Microstructure adjustment from solid microspheres structure to hollowed core–shell spheres is visibly taken place on this amazing spheric quasi-SEI film during the stabilization. Benefiting from the highly activated surface with weakened P P bond strength and the strengthened binding force between phosphorus and binders, the optimized phosphorus anode presents an outstanding long-term durability with a high discharge capacity of 1126.4 mAh/g over 400 cycles at 200 mA g−1 even at a high phosphorus load ratio of 70 wt%. This revolutionary configuration of quasi-SEI film provides high-capacity anode materials subject to large volumetric changes an unconventional approach from dependence on conductive framework/matrix. [ABSTRACT FROM AUTHOR]