Investigation of structural, morphological and electrochemical properties of mesoporous La2CuCoO6 rods fabricated by facile hydrothermal route
来源期刊：International Journal of Minerals Metallurgy and Materials2020年第7期
论文作者：Ashok Kumar
文章页码：987 - 995
摘 要：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 of4 A·g–1.
Ashok Kumar1,2
摘 要：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 of4 A·g–1.
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