Preparation of dually modified Si@NiO@CNFs as high-performance anodes for lithium-ion batteries by electrospinning

Abstract

Due to its high theoretical capacity and plentiful deposits, Si has been extensively explored as a potential anode material for lithium-ion batteries. Research on Si-based materials is currently concentrated on problems like enhancing the volume effect (by around 300%) and the electrical conductivity of Si. As a result, using the electrostatic spinning method, Si@NiO@Carbon Nanofibers (CNFs) anodes with dual modifications were created in this research. A more stable and substantial specific capacity for lithium-ion batteries is achieved due to the unique structure's amelioration of the agglomeration phenomena, volume expansion effect, and low conductivity of Si nanoparticles. At a high current density of 3 A/g, it has an excellent reversible specific capacity, and after 1000 cycles in a lithium-ion battery, it still has a specific capacity of 861.77 mAh/g. Exhibits favorable rate performance at various current densities. In addition, after 1000 cycles, the surface of the Si@NiO@CNFs electrode is smooth, the structure is undamaged, and the cross-sectional thickness expands by approximately 23.19%. As a high-performance energy storage material, Si-based anode material with twofold modification has many potential applications. By designing the structure of the Si cladding layer, this study offers a novel, efficient, and practicable solution for the rapid capacity decline of Si materials.