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.