Phase transformation in wet chemically synthesized Y 2 NiFeO 6 , and its magnetic and energy storage properties
- PDF / 2,665,439 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 84 Downloads / 195 Views
Phase transformation in wet chemically synthesized Y2NiFeO6, and its magnetic and energy storage properties Manju Devi1 · Ashok Kumar2 · Ashavani Kumar1 Received: 21 May 2020 / Accepted: 11 July 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In this work we report, the structural, magnetic, and energy storage properties of double perovskite oxide Y 2NiFeO6 synthesized via wet chemical sol–gel process. The amorphous phase structure obtained at the synthesis temperature of 650 °C, turned to mixed cubic-hexagonal phase of Y 2NiFeO6 at 850 °C, and subsequently to thermally stable mixed cubic-orthorhombic phase at and above the temperature of 950 °C. The X-ray photoelectron spectra of thermally stable phase of Y2NiFeO6 exhibited the presence of yttrium in Y 3+ state, nickel in N i2+/Ni3+ state and iron in F e3+ state. The Y 2NiFeO6 exhibited room temperature ferromagnetic behavior with Curie temperature at or above the room temperature. The highest specific capacitance achieved via cyclic voltammetry in three-electrode system was 74.10 F/g at the scan rate of 5 mV/s. It has remarkable specific capacitance retention of ~ 95% after 5000 chargingdischarging cycles at the current density of 6 A/g. The energy storage parameters i.e., energy density and power density were ~ 3.93 Wh/kg and ~ 810.03 Wkg−1, respectively at current density of 1 A g−1.
* Ashok Kumar [email protected] * Ashavani Kumar [email protected] 1
Department of Physics, National Institute of Technology Kurukshetra, Haryana 136119, India
Department of Applied Sciences, National Institute of Technical Teachers′ Training and Research Chandigarh, Chandigarh 160019, India
2
13
Vol.:(0123456789)
622
Page 2 of 10
M. Devi et al.
Graphic abstract
Keywords Double perovskites · Wet chemical sol–gel · Magnetic behavior · Energy storage behavior
1 Introduction The properties of double perovskites, A 2BB’O6, can be tailored by substituting different metal cations at B and B’ positions [1,2]. In this work yttrium, nickel and iron have been substituted in place of A, B, B’. The substitution of magnetic metals leads to magnetic behavior in the material. The magnetic behavior of double perovskite has been pursued, as these materials have multifunctional properties such as magnetoresistance, spintronic, magnetocaloric effect and multiferroicity [3–7]. Materials with Sr at A position (Sr2CrWO6, Sr2FeCoO6) have been found to reveal giant magnetoresistive behavior which makes them good candidate for data storage application [6,7]. Some of the double perovskite oxides with yttrium at A position ( Y2CoMnO6, Y2NiMnO6, Y2FeCoO6, Y2NiCoO6), studied for magnetic behavior, have recently being investigated for energy storage applications [8–11]. The substitution of multi-oxidation state transition metals is responsible for faradic reactions in these materials. Double perovskites with lanthanum at A position have been found to possess good energy storage performance
13
because of high conductivity of lan
Data Loading...
