Reliable and cost-effective energy storage systems can only be designed using electrode materials that exhibit high energy densities and consistency. In this work, NiCo2S4@NiCo2O4 core@shell nanoneedle-like nanostructures (NCS@NCO/rGO) are synthesized over the rGO sheet using a new and easy hydrothermal approach. Electrolyte transport and sulfur incorporation during charge–discharge reactions are both made easier by the core@shell nanostructured arrays' large active surface area. The ternary electrodes made of NCS@NCO/rGO have a rich mesoporous framework, a large surface area of 156.5 m2g−1, and an ideal distribution of pore sizes centered at 8.1 nm. An impressive specific capacitance of 2011 Fg−1 at 10 mV s−1 demonstrates the exceptional performance of the NCS@NCO/rGO ternary electrode. The ternary electrodes made of NCS@NCO and rGO have been shown to have remarkable cyclic stability in reports, maintaining 91 % of their capacity after 10,000 cycles. With an impressive power density of 983 Wkg−1 and an outstanding cycling durability of 98.8 % retention of the original capacitance after 10,000 cycles, the manufactured NCS@NCO/rGO//AC ACS displays a noticeable energy density of 68.5 Whkg−1. The mesoporous structure is excellent for increasing the characteristics of supercapacitor electrodes, as these astounding results can attest.