High-performance asymmetric supercapacitor based on CdCO3/CdO/Co3O4composite supported on Ni foam

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

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

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.

Original languageEnglish
Pages (from-to)31557-31565
Number of pages9
JournalRSC Advances
Volume11
Issue number50
DOIs
StatePublished - 4 Sep 2021
Externally publishedYes

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