Work

Optimizing (1‐x) BiFeO 3 ‐xCaTiO 3 Perovskites: A Pathway to Efficient Flexible Energy Storage

Year: 2025

Type: article

Abstract: New advanced functional material manufacturing and electrode design are the keys to developing the next generation of smart energy storage devices. This study explores the electrochemical performances of (1‐x) BiFeO 3 ‐xCaTiO 3 ( x = 0.4, 0.5, 0.6) (BFO‐CTO) perovskite for flexible electrochemical capacitors (ECs). BFO‐CTO are synthesized via solid‐state reaction, ensuring phase purity, while electrodes are printed on a flexible graphene sheet. X‐ray photoelectron spectroscopy (XPS) confirmed the mixture of metallic bismuth (Bi (0) ) and Bi 2 O 3 (Bi 3+ ), enhancing charge through redox activity and conductivity. The 60BFO‐40CTO composition exhibited a crystalline perovskite structure with high conductivity (14.03 kS.m −1 ) and hydrophilic properties (contact angle 40.3°). This resulted in a high electrochemically active surface area of 1.059 x10 −3 cm 2 and a specific capacitance of 2.79 mF.cm −2 in the symmetric EC. The asymmetric BF6CT4‐G‐EC, configuration achieved approximately an 80% increase in capacitance compared to the symmetric counterpart. It retained ≈90% of its initial capacitance after 6000 cycles, and maintained ≈72% capacity after 3000 cycles under 40° bending. These results highlight the potential of BFO‐CTO perovskites as high‐performance electrode materials for flexible energy storage applications.

Source: Advanced Functional Materials

DOI: 10.1002/adfm.202507692