Enhanced electrochemical performance of supercapacitor by integrating hierarchical oxygen-rich carbon nanotube aerogel with layered MoS2

The pursuit of high-performance supercapacitors demands innovative electrode materials with enhanced electrochemical properties and structural stability. Herein, we construct the hierarchical oxygen-rich carbon nanotube aerogel integrated with layered MoS₂ (HOCA-MoS₂) by the strongly interfacial interactions of 1D/2D hybrid. The oxygen-rich surface of CNTs (OCNT) not only improves the dispersion and interfacial bonding with MoS₂ but also significantly enhances the overall electrical conductivity by forming strong interaction at the HOCA-MoS₂ interface. This hierarchical architecture facilitates efficient charge transfer and provides a high surface area, promoting ion accessibility and rapid diffusion during electrochemical processes. Interfacial design of OCNT coupled MoS₂ hetero-interface leads to a significant improvement in specific capacitance, rate capability, and cycling stability. As probed by electrochemical measurement, HOCA-MoS₂ delivers a high specific capacitance of 390 F g⁻¹ at 1 A g⁻¹ and retains 92.5 % of its initial specific capacitance after 2000 cycles. The results suggest that the incorporation of oxygen functionalities and hierarchical structuring offers a promising strategy for the development of next-generation supercapacitor electrodes with enhanced performance metrics.