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 language | English |
---|---|
Pages (from-to) | 31557-31565 |
Number of pages | 9 |
Journal | RSC Advances |
Volume | 11 |
Issue number | 50 |
DOIs | |
State | Published - 4 Sep 2021 |