High-performance supercapacitor constructed with rare-earth Gd-Pr Co-doped NiMn2O4 cathode and MoO2/CNT anode

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• The supercapacitor demonstrates high energy density and power performance, which is essential for efficient energy storage.
• Co-doping with gadolinium and praseodymium in NiMn2O4 maximizes electrochemical properties, enhancing overall performance.
• The method incorporates MoO2 and carbon nanotube (CNT) composites at the anode for improved conductivity and stability.
• These findings highlight the potential of rare-earth co-doped materials in advancing supercapacitor technology for future applications.