Facile microwave synthesis of nanoflower-like (NiCoCrCuSb)Te for bifunctional electrode toward supercapacitor and oxygen evolution reaction
摘要
The development of electrode materials with high energy density and efficiency is crucial for the next generation of supercapacitors and electrocatalytic devices. This work employs a multi-metal synergy strategy to present (NiCoCrCuSb)Te high-entropy telluride synthesized via microwave method. The material shows a specific capacitance of 3454.5 F g−1 at 1 A g−1 in a three-electrode system, retaining 87.7% of its capacity following 50,000 cycles. As an OER electrocatalyst, it achieves an overpotential of 195.8 mV at 10 mA cm−2 and a Tafel slope of 64.5 mV dec−1. DFT calculations show that the multi-metal introduction modulates the electronic density of states and reduces the energy barrier for OH⁻ adsorption. The assembled asymmetric supercapacitor with the FeSe2 anode delivers an energy density of 291.8 Wh kg⁻1 at 799.9 W kg⁻1, maintaining 80.6% capacitance after 50,000 cycles, highlighting its application potential of energy storage and conversion. This work not only provides a novel synthetic route for designing high-performance high-entropy telluride materials but also elucidates the underlying mechanism for their enhanced properties, demonstrating significant potential in the field of efficient electrochemical energy conversion and storage.
Graphical Abstract