<p>Experimental Results* Original Datas.</p>

The optimized BMO-15 electrode showed superior specific capacitance of 531 F g⁻¹ at the current density of 1 A g⁻¹ with retaining 90% capacity after 10,000 charge–discharge cycles at 6 A g⁻¹, which revealed its cycling stability. Moreover, the fabricated asymmetric supercapacitor device (BMO-15//AC) exhibited a remarkable energy density of 33.05 Wh kg⁻¹ and power density of 1399 W kg⁻¹, and it maintained 72% of its initial capacitance after 5000 charge-discharge cycles.

The electrochemical performance is explained by the structural stability of the tetragonal BMO-15 framework, the high redox activity of the active sites of Mo and the synergistic effect of the BMO-15 and activated carbon electrodes. Based on these results, BMO-15 nanoparticles are shown to be a promising material for the next generation of high-performance supercapacitors which can be considered as a sustainable material.</p></div>