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

Rodrigo Henríquez; Alifhers S Mestra-Acosta; Eduardo Muñoz; Paula Grez; Elena Navarrete-Astorga; Enrique A Dalchiele

doi:10.1039/d1ra05243h

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

RSC Adv. 2021 Sep 23;11(50):31557-31565. doi: 10.1039/d1ra05243h. eCollection 2021 Sep 21.

Authors

Rodrigo Henríquez¹, Alifhers S Mestra-Acosta¹, Eduardo Muñoz¹, Paula Grez¹, Elena Navarrete-Astorga², Enrique A Dalchiele³

Affiliations

¹ Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso Casilla 4059 Valparaíso Chile rodrigo.henriquez@pucv.cl +56 32 2274921.
² Universidad de Málaga, Departamento de Física Aplicada I, Laboratorio de Materiales y Superficies (Unidad asociada al CSIC) E29071 Málaga Spain.
³ Instituto de Física, Facultad de Ingeniería Herrera y Reissig 565, C. C. 30 11000 Montevideo Uruguay.

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.