<p>MoS₂ possesses a high theoretical capacity and distinctive structure, but its practical application in batteries is hindered by structural instability and slow ion diffusion. In this study, a pre-sodiation strategy using a simple water/ethanol solvent system combined with thermal annealing is proposed, in which Na₂CO₃ acts as the sodium source. Compared to MoS₂, NaMoS₂-8 has superior cycle stability. After 100 cycles at 0.1 A g⁻¹, the NaMoS₂-8 half-cell retained 85% of its capacity (decreasing from 121 to 103.5 mAh g⁻¹), a significantly slower fade than the MoS₂ half-cell, which retained only 36% (from 91.5 to 32.9 mAh g⁻¹). Furthermore, full cells were assembled and tested, using NaMoS₂-8 and Na₃V₂(PO₄)₃ (NVP) as the electrode materials. After 100 cycles, the specific capacities of the full cell were 60.3 mAh g⁻¹ (NaMoS₂-8) and 30.4 mAh g⁻¹ (MoS₂), respectively. The improved performance of NaMoS₂-8 is attributed to the pre-sodiation, which compensates for irreversible capacity loss and mitigates volume expansion by introducing additional sodium into MoS₂ structure beforehand. This research provides new perspectives on the production and application of NaMoS₂ for future research.</p>