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In this work, a high-performance asymmetric supercapacitor has been developed by using porous vanadium pentoxide (V2O5) nanotubes as positive electrode and activated carbon nanorods as negative electrode in an aqueous 2 M LiNO3 electrolyte. To maximize the energy density of the asymmetric supercapacitor, the initial potentials of work electrodes are tuned to different values (0 V, −0.1 V, −0.2 V,...
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