Lithium-ion batteries (LIBs) serve as a foundational technology in modern energy storage systems, yet the development of anode materials combining high capacity with sustained cycling stability remains a significant challenge. Carbon nanotubes (CNTs) have demonstrated considerable theoretical promise as anode materials; however, their practical implementation is constrained by pronounced capacity degradation following initial charge-discharge cycles. Silicon-based composite architectures have been proposed as a strategy to enhance both mechanical stability and electronic conductivity in such systems. This study investigates the electrochemical performance of a composite material comprising multi-walled carbon nanotubes (MWCNTs) encapsulated within an arrayed mesoporous silicon matrix, with the aim of evaluating whether this structural configuration can mitigate the cycling limitations characteristic of CNT-based anodes. The composite was synthesized through incorporation of MWCNTs during the preparation of SBA-15 ordered mesoporous silica, followed by magnesiothermic reduction to convert the silica framework to silicon.

The resulting material (MWCNT@SBA-15(Si/SiO₂), hereafter MCSS), was characterized using transmission electron microscopy (TEM), solid-state nuclear magnetic resonance (NMR) spectroscopy, and galvanostatic cycling in a half-cell configuration. TEM imaging confirmed successful integration of CNTs within the silica/silicon matrix. NMR spectroscopy verified the presence of both silicon and carbon species. Electrochemical evaluation demonstrated that the assembled half-cell achieved a stabilized capacity following solid electrolyte interphase (SEI) formation. These results indicate that the MCSS composite material constitutes a viable architectural approach for LIB anode development, establishing a foundation for further research into optimization of synthesis parameters and electrochemical performance enhancement.