Electrospinning Si-Ti alloy nanoparticles into 3D spindle mesh Structure: An integrated self-supporting anode with in-built high conductive framework

Abstract

Low conductivity and volumetric expansion are the core factors hindering the practical application of high-capacity silicon anodes. 3D spindle mesh structure has been electrospun with the Si-Ti alloy nanoparticles fabricated by DC arc plasma evaporation. When served as a flexible, self-supporting anode of Lithium-ion batteries, high discharge capacity has been achieved with outstanding rate performance. Additionally, the electrode retains a capacity of 462.2 mAh/g after 500 cycles at a current density of 1 A·g⁻¹, exhibiting superior cycling stability with a coulombic efficiency maintained above 99 %. The integrated self-supporting electrode minimized the impact of binders, conductive agents, and current collectors, significantly reducing side reactions at the electrode–electrolyte interface. This innovative structure showcases excellent electrochemical performance as a promising candidate for Lithium-ion battery anodes.