Harnessing the synergistic effects of graphene oxide based Sn/Fe codoped Bi2O3 nanocomposites for superior supercapacitor performance

• Published in: Journal of energy storage 2024-08, Vol.96, p.112636, Article 112636
• Main Authors: Mane, V.A., Dake, D.V., Raskar, N.D., Sonpir, R.B., Gattu, K.P., Shirsat, M.D., Dole, B.N.
• Format: Article
• Language: English
• Subjects: Bi2O3; Codoping; Graphene oxide; Hydrothermal; Supercapacitor
• ISSN: 2352-152X
• DOI: 10.1016/j.est.2024.112636

Pure Bi2O3, 5 % Sn/Fe codoped Bi2O3, Graphene Oxide (GO) based Pure, and 5 % Sn/Fe codoped Bi2O3 nanocomposite are synthesized using a hydrothermal method. The synthesized material is comprehensively characterized to investigate its crystallographic, morphological, magnetic, and surface properties. Our findings reveal that the GO-based 5 % Sn/Fe co-doped Bi2O3 exhibits an exceptional capacitance of 1302.5 F/g. This remarkable capacitance enhancement can be attributed to a combination of factors, including changes in crystalline size, enhanced magnetization properties, an increase in surface area (170.86 m2/g), the introduction of defects in the material's structure, as well as low value of charge transfer resistance (0.3817 Ω) which indicates exceptional conductivity of the material. GO-based 5 % Sn/Fe co-doped Bi2O3 illustrates remarkable cycle stability with a retention rate of 81 % after 2000 cycles. The findings from this research provide evidence that GO-based Sn/Fe co-doped Bi2O3 is a material with outstanding prospects for high-performance energy storage applications, especially in supercapacitors. The combined effects of GO inclusion and co-doping provide new opportunities for the development of novel electrode materials with improved electrochemical characteristics. [Display omitted] •The manuscript reports synthesis of GO-based Sn/Fe co-doped bismuth oxide nanoflakes using the hydrothermal method.•Comprehensive discussions were made on the physical, topological, and magnetic characteristics of synthetic materials.•Impact of GO and co-doping was discussed thoroughly.•GO based 5 % Sn/Fe codoped Bi2O3 nanocomposite shows excellent supercapacitor performance.•Enhanced surface area and defects were introduced due to introduction of GO and co-doping.