Tetragonal-symmetric Bi2CdO4 nanoflakes: Symmetrically configured device-grade solid-state supercapacitor

This article delves into the synthesis and characterization of tetragonal-symmetric Bi2CdO4 nanoflakes, highlighting their potential as advanced materials for supercapacitors. The study outlines a two-step wet chemical approach involving chemical bath deposition and an ion-exchange reaction to produce Bi2CdO4 on a stainless steel substrate. Key findings include the confirmation of the material's symmetric tetragonal crystal structure and nanoflake surface architecture, verified through XPS examination. The article also explores the electrochemical performance of the material, demonstrating a specific capacitance of 158.30 F/g and a capacitive retention of 68.15% over 3000 cycles. Additionally, the practical application of the material is showcased through the fabrication of a solid-state symmetric device, which exhibits a specific capacitance of 29.96 F/g and an energy density of 3.61 Wh/kg. The study concludes with a demonstration of the device's real-world applicability, powering a VNIT panel and a small dc fan, underscoring the potential of Bi2CdO4 nanoflakes in energy storage systems.