The current applications on WS₂ nanomaterials still face challenges and should be investigated in depth in the following aspects. Firstly, the study mechanism of HER needs to be deepened and clarified in terms of the fundamental properties of WS₂. Advanced characterization methods, such as in situ techniques, can be combined to analyze the structural changes of the material during the catalytic process and reveal the catalytic process of WS₂-based nanomaterials, especially electrocatalysis.

Tungsten disulfide possesses a much larger interlayer spacing of 0.62 nm than that of graphite (0.34 nm). This would be very favorable for the reversible process of Na⁺ intercalation/de-intercalation, making WS₂ a promising anode material for sodium-ion batteries (SIBs). For example, Liu et al. reported WS₂ nanowires (NWs) with an expanded interlayer spacing of 0.83 nm.

Recently, researchers demonstrated a specific capacitance of 398.5 F.g^-1 for sheet tungsten disulfide anode materials. However, the performance of these materials remains unsatisfactory. Encouragingly, Nagaraju et al. synthesized WS₂ nanoparticles used as supercapacitor electrode materials, which provided a high capacitance value of 1439.5 F.g^-1 at a current density of 5 mA.cm^-2 and maintained excellent cycling stability of 77.4% after 3000 cycles. This result suggests that WS₂ can be considered a promising candidate for supercapacitor electrode materials.