Effect of Nd doping on the Physical and electrocisemical properties of MnTiO, nanoparticles for supercapacitor applications

In light of the urgent challenges related to energy constraint and environmental pollution, significant focus has been directed towards supercapacitors as a viable solution. A study was carried out to find the physiochemical and electrochemical efficiency of Neodymium (Nd) doped perovskite MnTiO₃ by utilizing a hydrothermal approach. Several physical characterizations were used to find the effect of Nd-doped MnTiO₃. The Nd-doped MnTiO₃ exhibited a specific capacitance of 1175 F g^-1 with an energy density (E_d) of 53 Wh kg⁻¹ at 1 A g⁻¹ which disclosed stability, undergoing 5000^th cycles. Overall, the testing using both physical and electrochemical methods has demonstrated the doped electrode's outstanding performance, including its enhanced crystalline structure, advantageous morphology, larger surface area and higher specific capacitance. Improvement in electrochemical activities was accredited to various aspects, such as the multivalent manganese ions, a high surface area, the large ionic radius of Nd and the porous structure that enables fast ion movement. Furthermore, the addition of Nd has enhanced the integrity of the MnTiO₃ compound during cycling stability and significantly boosted electrochemical performance as found through the real time performance in two electrode system. Furthermore, the Nd-doped MnTiO₃ electrode verified superior presentation while two-electrode investigation, with a recorded specific capacitance of 347.5 F g^-1 at 1 A g^-1, an energy density of 14.2 Wh kg^-1, and a power density of 1086.2 W kg^-1. Hence, Nd-doped MnTiO₃ can be effectively used in future energy-storing devices.