Nd-Ions Role in Structural Engineering and Capacitive Contributions of NiO Nanosheets Clusters as Excellent Pseudocapacitor Electrode Material

Neodymium (Nd) ions doping in NiO has a major impact on morphology tuning and electrochemical properties enhancement. Herein Un-doped and Nd-ions doped nickel oxide Nd_xNi_1-xO (x = 0, 0.01, 0.03, 0.05) nanostructures have been synthesized by facile hydrothermal route. The SEM analysis exhibited that dopant plays crucial role in morphology optimization. The (XRD analysis exposed the cubic structures with average crystallite size of 28 nm. The CV measurements showed an improvement in the specific capacitance values with maximum value 1492.3 F/g at 5 mV/s for 3% Nd-doped electrode with 93.4% retention after 8000 cycles. The excellent performance is attributed to easy charge mobility and conductivity linked with nanosheets clusters. The power law (b = 0.65) and Dunn method (capacitive contribution 49.5%) exhibiting their pseudocapacitors capacitive nature. Current findings confirm the potential of Nd_0.03Ni_0.97O as an electrochemical material and open a new avenue for application in supercapacitor.