Influence of morphological variations in cobalt bismuth oxide on supercapacitor performance

In this study, we successfully synthesized novel cobalt bismuth oxide (CBO) using various solvothermal methods. These materials were then utilized as active electrode materials for supercapacitors and photocatalysts. A variety of techniques was employed to analyse the crystal structure, morphology,...

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Bibliographic Details
Published in:Electrochimica acta 2024-12, Vol.507, p.145173, Article 145173
Main Authors: Mondal, Sneha, Dilly Rajan, Karthik, Rathinam, Maheswaran, Vattikondala, Ganesh
Format: Article
Language:English
Subjects:
Lattice defects
Nonstoichiometric
Oxygen vacancies
Supercapacitor
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Summary:In this study, we successfully synthesized novel cobalt bismuth oxide (CBO) using various solvothermal methods. These materials were then utilized as active electrode materials for supercapacitors and photocatalysts. A variety of techniques was employed to analyse the crystal structure, morphology, and surface of the prepared samples. The morphological analysis revealed that S1 (nanosheet) and S3 (nanoneedles) are in nanostructure form. The S3 electrode demonstrated a specific capacitance of 270.9 F g-1 at a current density of 1 Ag-1, compared to the S1 electrode, which exhibited a specific capacitance of 181.7 F g-1 under the same conditions. Furthermore, when subjected to a current density of 3 A g-1, the S1 and S3 retained 79 % and 62 % of their capacitance, respectively after 2000 cycles. The morphological variations in the samples play a crucial role in capacitive performance and mechanism, characterised by a significant presence of lattice defects and oxygen vacancies. [Display omitted]
ISSN:0013-4686
DOI:10.1016/j.electacta.2024.145173