The open circuit potential of the material with respect to Na/Na + is around 2.4 V. However the redox potential of sodium (Na⁺/Na) is -2.71 V, which is just 0.3 V higher than that of lithium (Li⁺/Li) at -3.04 V theoretically. Based, on the above reactions, the energy storage properties of the PQD have been explored by utilizing it as a potential anode for the sodium-ion battery. The P-NH stretching vibration typically appears in the IR spectrum in the range of 2855 cm -1 -2931 cm⁻¹. A stronger P-N bond will result in a higher stretching frequency. The broad band seen in the range of 1600 cm⁻¹ -1700 cm⁻¹ can be attributed to P-OH, while P = O stretching frequency bands appear in the range of 1000 cm -1 to 1150 cm -1 . The electrochemical studies of the PQD and PQD_PW_A -C have been carried out within a potential window of 0.005 -1 V at a current density of 100 mA g -1 as seen in The determination of apparent diffusion coefficient (DNa+) has been carried out from the Nyquist plot. The slope of the Z vs. ω -1/2 plot has been determined, and the magnitude of the same has been used in the equation, given as-