Elucidating the capacitive behavior of Gd-doped BNT-BKT-BT electrodes in All-in-One supercapacitor devices

Abstract

Bi0.5Na0.5TiO3-Bi0.5K0.5TiO3-BaTiO3 (BNT-BKT-BT) ceramics having various amounts of Gd-ions were synthesized via the solid-state reaction method. The electrochemical performance analysis of the Gd-doped BNT-BKT-BT ceramics has shown that the doping amount considerably impacts the BNT-BKT-BT electrode’s electrochemical performance. The analysis of the defect centers was carried out using EPR spectroscopy. The samples showed paramagnetic defects in the EPR analysis. The 0.001 mol% Gd-doped BNT-BKT-BT showed a maximum signal intensity with partly resolved hyperfine lines, reaching the highest specific capacitance value of 612 F/g. The EPR results were compared with the prototype BaTiO3 perovskite ceramic and concluded that the BNT-BKT-BT system has an extremely large strain, which hinders determining the spin-Hamiltonian parameters such as crystal field and hyperfine due to inhomogeneous line broadenings.

Flower like-novel nanocomposite of Mg(Ti0.99Sn0.01)O3 decorated on reduced graphene oxide (rGO) with high capacitive behavior as supercapacitor electrodes

“…Ceramics are also considered an ideal material for supercapacitors due to their chemical stability, minimal cost, ease of fabrication [21], corrosion resistance, and producible in various shapes and sizes [22]. Supercapacitors made of ceramic materials are known to have a longer cycle life, higher power densities, and lower equivalent series resistance [23][24][25]. Magnesium titanate (MgTiO 3 ), one of the most popular dielectric ceramics, has been implemented in the industry for resonator dielectrics and filter applications in communication and radar systems [26,27], due to its relatively high permittivity, high-quality factor, and suitable density [28].…”

Hydrotropically Engineered Polyindole-Encapsulated Flower Shape Nanostructured MoS2 Conductive Framework for Asymmetric Supercapacitors

“…As a result, they have been favored in a wide range of applications involving energy storage, , sensors, and optoelectronics. , This can be attributed to the layered morphology resulting in enhanced ion transfer and charge mobility . In addition to this, doping these nanosized materials has also been reported to considerably enhance the overall performance . For instance, the defect structures in nanoscaled W-doped TiO 2 were found to improve conductivity .…”