Enhancing Electrochemical Performance with g-C 3 N 4 /CeO 2 Binary Electrode Material.

An innovative form of 2D/0D g-C 3 N 4 /CeO 2 nanostructure was synthesized using a simple precursor decomposition process. The 2D g-C 3 N 4 directs the growth of 0D CeO 2 quantum dots, while also promoting good dispersion of CeO 2 QDs. This 2D/0D nanostructure shows a capacitance of 202.5 F/g and notable rate capability and stability, outperforming the g-C 3 N 4 electrode, reflecting the state-of-the-art g-C 3 N 4 binary electrodes. The binary combination of materials also enables an asymmetric device (g-C 3 N 4 /CeO 2 QDs//AC) to deliver the highest energy density (9.25 Wh/kg) and power density (900 W/kg). The superior rate capacity and stability endorsed the quantum structural merits of CeO 2 QDs and layered g-C 3 N 4 , which offer more accessible sites for ion transport. These results suggest that the g-C 3 N 4 /CeO 2 QDs nanostructure is a promising electrode material for energy storage devices.