Investigation of structural, morphological and electrochemical properties of mesoporous La₂CuCoO₆ rods fabricated by facile hydrothermal route

Abstract

This work introduces the facile hydrothermal synthesis of double perovskite La₂CuCoO₆. X-ray diffraction pattern confirmed the formation of a monoclinic phase with P12₁/c1 symmetry. Transmission electron microscopy results revealed that the self-assembled porous rods were composed of nanocrystallite aggregates. The estimated specific surface area of these mesoporous rods with an average pore diameter of 6 nm was ∼41 m²·g⁻¹. The presence of ions with oxidation states of La³⁺, Cu²⁺, and Co²⁺/Co³⁺ on the surface of the mesoporous La₂CuCoO₆ rods was confirmed by X-ray photoelectron spectroscopic analysis. Via cyclicvoltammetry and chronopotentiometry, the electrode fabricated from the mesoporous La₂CuCoO₆ rods were found to exhibit pseudocapacitive behavior with a specific capacitance of 259.4 F·g⁻¹ at a current density of 0.5 A·g⁻¹. An ∼89% retention in specific capacitance was achieved after 1000 charge/discharge cycles at a constant current density of 4 A·g⁻¹.

Keywords

rare earth / double perovskites / oxide materials / hydrothermal / electrochemical

References

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