Electrochemical supercapacitor based on double perovskite Y2NiMnO6 nanowires

Abstract

The present work unveils the electrochemical properties of a newly emerging multiferroic material, double perovskite Y₂NiMnO₆, as an active material for the positive electrode of electrochemical supercapacitors. We have designed a facile, low temperature hydrothermal route for the fabrication of Y₂NiMnO₆ nanowires, to achieve the beneficial effects of a large active surface area at the nanoscale on the electrochemical properties of the material. A comparative study reveals that the Y₂NiMnO₆ nanowire-based electrode is superior than its bulk counterpart, exhibiting higher specific capacitance (77.76 F g⁻¹ at 30 mA g⁻¹), energy density (0.89 W h kg⁻¹ at 30 mA g⁻¹), power density (19.27 W kg⁻¹ at 150 mA g⁻¹) and cyclability (>1800 cycles), in addition to a good retention of 70.17%.