In this study, perovskite-structured lanthanum cobalt
oxide (LaCoO3/LCO) systems with particle and flake morphologies
were developed
using sol–gel and hydrothermal methods, respectively, in order
to investigate their morphological structure-dependent properties
for potential supercapacitor applications. The structural analysis
confirms that both methods yield LaCoO3 with improved crystalline
properties. The energy storage performance of the developed materials
is studied in a three-electrode configuration using a 1 M KOH electrolyte.
The results indicated superior electrochemical performance for the
LCO nanoflakes, exhibiting specific capacitances of ∼215 F
g–1 at a scan rate of 5 mV s–1 and ∼136 F g–1 at a current density of
1 A g–1. In comparison, the LCO nanoparticles showed
∼119 F g–1 at a scan rate of 5 mV s–1 and ∼99 F g–1 at a current density of 1
A g–1. This difference can be largely attributed
to their respective morphologies, porous structures, and surface defects.
Further, the nanoflakes demonstrated an exceptional capacitance retention
of ∼97% even after 5000 charge–discharge cycles. The
findings of this study suggest that the properties of perovskite LaCoO3 can be tuned by adjusting its morphology through various
synthesis methods, making LaCoO3 a viable and robust system
for energy storage applications.