Expanding the Potential Window through Synergistic Design and Oriented Heterostructure for Supercapacitor

Metal telluride-based nanomaterials have recently gained attention as promising candidates for enhancing the performance of electrodes in energy storage devices. In this study, Co-Zr-Te@CuO electrode materials engineered through strategic approach are introduced, involving the deposition of a Co-Zr metal-organic framework (MOF) on CuO nanowires, followed by a tellurization. This composite material demonstrates an expanded potential window of 1.2 V, making it potential electrode material for supercapacitor applications. Electrochemical evaluations reveal that the Co-Zr-Te@CuO electrode exhibits 576 C g⁻¹, 1.8 times higher than Co-Zr-MOF@CuO. Furthermore, density functional theory (DFT) calculations confirm enhancements in conductivity and explains the synergistic effects present within the heterostructure. Hybrid supercapacitor (HSC) device achieves a peak energy density of 69.4 Wh kg⁻¹ at a power density of 1.4 kW kg⁻¹. This evidence of Co-Zr-Te@CuO effective electrode performance demonstrates its potential and robust stability for real-world energy storage applications. © 2024 The Author(s). Small Methods published by Wiley-VCH GmbH.