Three-Dimensional VTe2/MXene/CNT Ternary Architectures for the Development of High Performance Microsupercapacitors

Abstract

Rapid advancements in portable electronics have created a demand for ultrathin power sources. Microsupercapacitors (MSCs) are becoming a competitive and advantageous option for these applications. It is widely recognized that to develop MSCs with exceptional performance, electrode materials having two-dimensonal (2D) permeable channels, structural scaffolds with high-conductivity and large surface area are suitable. Vanadium ditelluride (VTe₂) stands out as an ideal material platform in this context. Its unique combination of metallic properties and exfoliative characteristics-stemming from the conducting Te–V–Te layers held together by weak van der Waals interlayer interactions- renders it highly promising for high-performance MSCs.  This study is the first to report that the restacking issues and electrochemical performance of VTe₂ can be successfully avoided by the simultaneous incorporation of MXene and CNT to form a ternary hybrid. Here, a laser-induced graphene (LIG)-based MSC utilizing VTe₂/MXene/CNT as the active electrode material is fabricated. This MSC achieve fabrications an outstanding maximum energy density of 6.84 µWh cm⁻² and a power density of 304.7 µW cm⁻². This significant achievement demonstrates the potential of this LIG-based MSC to advance the design of high-performance micro-energy storage devices.