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Double perovskite oxides are useful electrode materials in supercapacitors. However, adopting their special structures to improve the electrochemical performances of supercapacitor electrodes is still challenging. In this study, hollow spherical porous La₂CoMnO₆ (HS-LCMO) materials were prepared using carbon spheres as template impregnation followed by annealing in air to remove the template. The proposed method was advantageous in terms of low-cost, simple operation, large scalability, and improved electrochemical performance of La₂CoMnO₆. The as-obtained HS-LCMO specimens were tested electrochemically, and the results were compared to reference sample (SG-LCMO) prepared by the sol-gel method. At current density of 1 A g⁻¹, HS-LCMO showed high specific capacitance of 376 F g⁻¹, much higher than that of SG-LCMO (94 F g⁻¹). To expand the application prospects of supercapacitors …