<p>Effectively addressing the structural stability and conductivity challenges of transformed reactive anode materials is crucial for the practical application of lithium-ion batteries (LIBs). A promising design strategy involves utilizing void spaces and high-conductivity materials to accommodate volume variations while enhancing electrical conductivity. In this study, an intermediate template and carbon precursor were constructed using a hard template technique combined with a polymerization reaction. Following annealing and template removal, a yolk-shell structured NiS/C (YSS-NiS/C) was successfully synthesized. This unique yolk-shell architecture not only mitigates sulfur component loss but also significantly enhances the electrical conductivity of the electrode material. More importantly, the intermediate voids effectively buffer the volume changes of NiS while preserving the structural integrity of the microstructure. These advantages are reflected in the electrochemical performance, with YSS-NiS/C demonstrating a reversible capacity of 640 mAh g⁻¹ after 300 cycles at 0.2 A g⁻¹. Furthermore, through electrolyte optimization, the electrochemical performance of NiS, particularly its rate capability, was substantially improved, achieving a capacity of up to 389 mAh g⁻¹ at a high current density of 3 A g⁻¹.</p>