| Summary: | In recent years, the development of lightweight electrode materials with excellent performance (energy density versus power density) has increased the number of uses for supercapacitors. Creating three-dimensional skeletal network structures with excellent specific capacitance and high energy density is still challenging. This study utilized a straightforward one-pot hydrothermal technique to construct a supercapacitor based on hydrogel 3D skeletal networks comprising rGO nanosheets with VS<sub>2</sub>/WS<sub>2</sub> nanoparticles. The rGO appeared as flakes and layers, interconnected in nature, allowing for more ion transport pathways and a larger active surface area for EDLC performance. The heterostructured VS<sub>2</sub> and WS<sub>2</sub> nanoparticles were homogeneously anchored to the rGO layers and were porous in the hydrogel structure. The functioning rGO, rGO-VS<sub>2</sub>, and rGO-VS<sub>2</sub>-WS<sub>2</sub> composite hydrogel electrodes were created without a binder on the Ni foam current collector using a hydraulic press. The rGO-VS<sub>2</sub>-WS<sub>2</sub> composite hydrogel electrode showed excellent supercapacitor performance of 220 F g<sup>−1</sup> at 1 A g<sup>−1</sup> in 3M KOH electrolyte, which was more than those of the GO (158 F g<sup>−1</sup>) and rGO-VS<sub>2</sub> (199 F g<sup>−1</sup>) hydrogels under similar conditions. Hydrogel electrodes made of rGO-VS<sub>2</sub>-WS<sub>2</sub> had a power density of 355 Whkg<sup>−1</sup> and a high energy density of 30.55 Whkg<sup>−1</sup>. It maintained a high energy density of up to 21.11 W/kg<sup>−1</sup>, even at a high power density of 3454 W/kg<sup>−1</sup>. Given the 3D shape and the excellent surface properties of rGO nanosheets with VS<sub>2</sub> and WS<sub>2</sub> nanoparticles as the hydrogel, this electrode has essential properties that make it a good choice for making high-performance capacitors.
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