Unveiling the advancements in electrochemical performance of 2D transition metal dichalcogenides as an electrode material in asymmetric supercapacitors

Two-dimensional transition metal dichalcogenides (TMDCs) have emerged as promising electrode materials for supercapacitors due to their unique properties, such as high surface area, excellent electrical conductivity, and robust mechanical stability. This review focuses on the recent advances in MoSe₂, MoS₂, and WS₂-based supercapacitors, highlighting their exceptional electrochemical performance, including high specific capacitance, excellent rate capability, and long cycle life. We discuss the creative methods for producing hybrid TMDC-based nanomaterial's, which have shown improved electrical conductivity, reduced agglomeration, and optimized electrochemical sites. These hybrid materials have demonstrated enhanced electrochemical performance, including specific capacitance values up to 774 F/g, excellent rate capability up to 10 A/g, and long cycle life up to 10,000 cycles. The results demonstrate that TMDC-based supercapacitors can achieve high energy density, high power density, and excellent cycling stability, making them promising candidates for high-performance energy storage applications. Furthermore, we highlight the challenges and future directions for TMDC-based supercapacitors, including the need for scalable and cost-effective synthesis methods, improved understanding of the electrochemical mechanisms, and development of hybrid TMDC-based materials with optimized properties.