The article discusses the superior storage performance of a Si@SiO₂/C nanocomposite as an anode material for lithium-ion batteries. The nanocomposite, synthesized through hydrothermal carbonization of glucose in the presence of silicon nanoparticles, exhibits high reversible lithium storage capacity (≈1100 mAhg⁻¹), excellent cycling performance, and high rate capability. The Si@SiO₂/C nanocomposite combines the advantages of silicon (high lithium storage capacity) and carbon (long cycle life) by forming a core/shell structure with a thin layer of amorphous SiO₂ and a carbon shell. This structure provides sufficient conductivity and polymer-like elasticity to withstand the deformation stresses during Li insertion/extraction processes. The improved performance is attributed to the formation of a stable solid electrolyte interphase (SEI) layer, which is more cohesive and flexible in the presence of vinylenic carbonate (VC) in the electrolyte. The study highlights the potential of Si@SiO₂/C nanocomposites as promising anode materials for lithium-ion batteries.The article discusses the superior storage performance of a Si@SiO₂/C nanocomposite as an anode material for lithium-ion batteries. The nanocomposite, synthesized through hydrothermal carbonization of glucose in the presence of silicon nanoparticles, exhibits high reversible lithium storage capacity (≈1100 mAhg⁻¹), excellent cycling performance, and high rate capability. The Si@SiO₂/C nanocomposite combines the advantages of silicon (high lithium storage capacity) and carbon (long cycle life) by forming a core/shell structure with a thin layer of amorphous SiO₂ and a carbon shell. This structure provides sufficient conductivity and polymer-like elasticity to withstand the deformation stresses during Li insertion/extraction processes. The improved performance is attributed to the formation of a stable solid electrolyte interphase (SEI) layer, which is more cohesive and flexible in the presence of vinylenic carbonate (VC) in the electrolyte. The study highlights the potential of Si@SiO₂/C nanocomposites as promising anode materials for lithium-ion batteries.