High-performance asymmetric supercapacitor based on CdCO₃/CdO/Co₃O₄ composite supported on Ni foam.

ABSTRACT: A CdCO₃/CdO/Co₃O₄ composite has been prepared on nickel foam through a combined hydrothermal-annealing method. An asymmetric hybrid supercapacitor (SC) device was assembled with this composite as the positive electrode and activated carbon was the negative electrode. The SC exhibited a high specific capacitance of 84 F g^-1 @ 1 mA cm^-2, a maximum energy density of 26.3 W h kg^-1, and a power density of 2290 W kg^-1, along with a wide potential window of 1.5 V and long cycle life (92% after 6000 cycles). SCs assembled in series powered various light-emitting diodes and moved an electrical mini-motor.

SUBMITTER: Henriquez R 

PROVIDER: S-EPMC9041682 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature