In current scenario, for fast working appliances, scientists mostly work to develop and design the advanced energy storage devices. Batteries, rechargeable batteries, conventional capacitor, and supercapacitor (SC) are some of the devices, which are used nowadays in several applications to store electrical energy. [1] Batteries have high specific energy; however, main issue with battery is that it has the low specific power compared with the SC. On the contrary, SCs have high specific power and discharge maximum amount of energy in a very short duration, which we need for new generation fast devices and applications wherein high and fast power output is required. [2] A full SC device is just like the battery, made up of four parts: positive electrode, negative electrode, electrolyte, and separator. Out of these four components, electrode materials mainly decide cost and performance of the SC. In this scenario, nanostructured materials proved to be a worthy choice for better performance SC. [3] Hence, intensive research has been devoted toward designing and fabrication of high-quality nanostructured electrode materials. For instance, recently, different types of transition metal compound-based electrode have attracted enormous attention due to their unique physio-chemical properties, such as high electrical conductivity, high hardness, electrochemical stability, and wear and corrosion resistances. [4] These properties of transition metal compound make them a promising and active electrode material to be used for SCs. To make SC more effective and promising energy device, researchers are working on the various kinds of transition metal compounds, such as oxides, carbides, phosphides, and nitrides. Out of these metal compounds, all have some advantages as well as disadvantages. In case of metal oxide-based electrodes, even though these electrodes show high capacitance value, the main problem is to have their relatively poor electrical conductivity, which, in turn, hinders their capacitive performance rate. [5] Non-oxide materials, such as metal sulfide and metal carbidebased active electrodes, have high electrical conductivity and hydrophilic nature. For instance, 1 T MoS 2 and Ti 3 C 2 , both the electrodes have the ultrahigh volumetric capacitance of 650 and 900 F cm À3 , respectively. However, these types of electrodes are restricted to have 1 V s À1 highest sweep rate. [6] On the other hand, transition-metal nitrides (TMNs), such as TiN, show high electrical conductivity compared with their respective metal carbides, which, in turn, offers high energy storage. [7] It has been confirmed that the electronic structure of metal host is strongly affected by introducing N (nitrogen) atoms. These metal nitrides attained great consideration as an electrode material for SC,