Transition metal chalcogenides (TMCs) embedded with a carbon network are gaining much attention because of their high power capability, which can be easily integrated to portable electronic devices. Facile chemical route has been explored to synthesize hexagonal structured VS nanoparticles onto multiwalled carbon nanotubes (MWCNTs) matrix. Such surface-modified VS/MWCNTs electrode has boosted the electrochemical performance to reach high capacitance to 830 F/g and excellent stability to 95.9% over 10 000 cycles. Designed flexible solid-state symmetric supercapacitor device (FSSD) with a wide voltage window of 1.6 V exhibited maximum gain in specific capacitance value of 182 F/g at scan rate of 2 mV/s along with specific energy of 42 Wh/kg and a superb stability of 93.2% over 5000 cycles. As a practical approach, FSSD has lightened up "VNIT" panel consisting of 21 red LEDs.

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Present innovation emphasizes the design and development of hybrid nanoarchitecture by using simple twostep chemical routes, namely, "dip and dry", for multiwalled carbon nanotubes (MWCNTs) followed by coating of molybdenum telluride (MoTe 2 ) nanopebbles using successive ionic layer adsorption and reaction (SILAR) to form a thin film onto flexible stainless steel (SS) substrate toward the fabrication of a symmetric solid-state and flexible supercapacitor device. The MWCNTs/MoTe 2 nanostructured composite exhibits strong synergy and materials mutualism between electric double-layer capacitive (EDLC) behaved MWCNTs and pseudocapacitive MoTe 2 leading to the enhanced supercapacitive performance. Interestingly, the formed unique nanoarchitecture offers an excellent charge-storing capability of 502 F/g as the specific capacitance at 2 mV/s in liquid configuration with excellent rate capability and cyclic stability. The formed flexible complete solid-state symmetric supercapacitor (FCSS-SC) device using two SS/MWCNTs/MoTe 2 electrodes with poly(vinyl alcohol)-lithium perchlorate (PVA-LiClO 4 ) gel electrolyte as a mediator has demonstrated an upgraded potential window resulting in superior capacitance and energy density. Additionally, mechanical flexibility, cyclic stability, and hands-on application by a glowing light-emitting diode (LED) can attract the value of the formed device toward the advanced energy storage meadow.

Ultrathin nanoflakes surface architecture of MoS2 thin film has been successfully decorated by simple and inexpensive chemical bath deposition onto dip and dry coated multiwalled carbon nanotubes (MWCNTs) to compare electrochemical performance with respect to individual MWCNTs and MoS2 thin films on flexible stainless steel (SS) substrates. Two dimensional thin films of MWCNTs, MoS2 and MoS2/MWCNTs (MCT) have been characterized through X‐ray diffraction, X‐ray photospectroscopy, Raman spectroscopy and scanning/transmission electron microscopes. The unique nanostructured morphology of well anchored nanoflakes over MWCNTs enhances the value of specific capacitance and improves the cycle stability compare to bare MoS2. Strikingly, all‐solid‐state (ASS) symmetric SS/MCT//MCT/SS supercapacitor device has been constructed using flexible stainless steel substrate with the aid of PVA‐LiClO4 gel electrolyte and results are discussed herein.