Rapid and stable energy storage using MoN/Mo2N composite electrodes

• DOI: 10.1016/j.apsadv.2024.100579
• Publication Date: 2024-02-16T18:32:06Z
• Authors: Jeyakiruba Palraj; Anthony Arulraj; Sasikumar M; Helen Annal Therese
• Keywords: Energy storage; Industrial electrochemistry; b-values; TA401-492; Nanorods; Pesudocapcitor; Mechanochemical method; Materials of engineering and construction. Mechanics of materials; 01 natural sciences; TP250-261; 0104 chemical sciences

Molybdenum nitride-based composites, specifically the two-dimensional MoN/Mo2N variants, emerge as promising electrode materials for next-generation energy storage devices. This research presents a facile synthesis approach involving mechanochemical method followed by heat treatment at 900 ֯C in nitrogen atmosphere to produce composite material. Crystallographic analysis using X-ray diffraction (XRD) and morphological characterization via high-resolution scanning electron microscopy (HRSEM) were conducted. The electrochemical evaluation demonstrated remarkable supercapacitor performance, with specific capacitance of 306.7 F/g 1 A/g, highlighting exceptional charge capacity. Even higher current density 2 maintained substantial reversible capacity (198.6 F/g), retention (95.7 %), Coulombic efficiency (86.2 %) over 6000 cycles, showcasing its robust stability. At challenging 10 remained high 85.4 F/g. Detailed mechanism analysis, employing Dunn method, revealed complex interplay capacitive diffusive processes. Particularly noteworthy was predominance behavior, constituting 78.4 % an accelerated scan rate 100 mV/s. observation underscores material's advantageous propensity proportion behavior elevated rates, making it well-suited applications requiring rapid release.