The degradationKarthick Sivalingam Nallathambi ofManik Clinton Franklin fossilLekshmi Sunil fuelsJayashree Chandrasekar, environmentalYogapriya Selvaraj conservationHemalatha Kulandaivel, and the increase in demand for energy are the factors that address the need for energy storage. The electrochemical energy is stored in an energy storage device. Supercapacitors are energy storage devices that provide high charge and discharge rates, extraordinary cyclic stability, high power densityPower density, and moderate energy density. Supercapacitors are applied in various fields, such as power hybrid electric vehicles and other electronic systems. Based on the type of electrode material used, the charge storage mechanism differs, and supercapacitors are classified as electric double-layer capacitors, pseudo capacitors, and hybrid supercapacitors. The combined effect of carbonaceous materials due to their stability and redox materials that improve the charging-discharging process in hybrid supercapacitors creates a new era in electric energy storage devices. The individual materials having specific properties can be tuned for hybrid supercapacitors. The literature review on hybrid nanostructures reveals that various morphology and interfaces create the possibility and flexibility to obtain new properties and functions. The improving properties are mechanical strength, high stability, light emission, and electron conductivity. The hybrid nanostructures possess morphologies such as core–shell nanoparticlesNanoparticles, nanowiresNanowires, nanorodsNanorods, nanobeltsNanobelts, nanoplatesNanoplates, and nanocubes, offering the highest impacts in electric energy storage devices. These designs depend on the internal and external interfacing capabilities and the physical/chemical compatibilities. The electron transfer between the current collector and the working electrode material is highly productive due to the void volume that leads to easy electrolyte access and fast ion transport. The surface area increases while the void volume increases in the material, hence the storage ability. The electrochemical properties of the individual materials can be doubled or more when the material is composited. The impact of hybrid nanostructures for fabricating efficient high-energy supercapacitors based on their charge storage mechanism is sorted out. The involvement of an effective hybrid nanostructure will improve the storage device in the near future.