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Facile synthesis and characterization of Bi13S18I2 films as a stable supercapacitor electrode material

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Abstract

Electrical double layer capacitors (EDLCs) featuring low-cost and solution-processable electrode materials have attracted significant research interest for their green and economical applications in energy harvesting and storage devices. Here, we demonstrate a novel synthetic route for films of an underexplored 3-D hexagonal bismuth chalcohalide, Bi13S18I2, and investigate its potential as the active electrode material in EDLC-type supercapacitors. The synthetic procedure has been optimised and comprises the lowest annealing temperature (150 °C) and the shortest processing time (1 h) currently reported. When integrated in a symmetrical EDLC with an aqueous NaClO4 electrolyte, the Bi13S18I2-based device achieves a remarkable areal capacitance of 210.68 mF cm−2 with 99.7% capacitance retention after 5000 cycles. Both the Bi13S18I2 powder and thin-film electrodes have been characterized through XRD, XPS, Raman spectroscopy, and SEM. The superior stability, low-cost, and facile synthesis of Bi13S18I2 proves its promising potential for supercapacitor applications.

Graphical abstract: Facile synthesis and characterization of Bi13S18I2 films as a stable supercapacitor electrode material

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Publication details

The article was received on 16 Nov 2018, accepted on 20 Dec 2018 and first published on 20 Dec 2018


Article type: Paper
DOI: 10.1039/C8TA11029H
Citation: J. Mater. Chem. A, 2019, Advance Article
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    Facile synthesis and characterization of Bi13S18I2 films as a stable supercapacitor electrode material

    K. Adams, A. F. González, J. Mallows, T. Li, J. H. J. Thijssen and N. Robertson, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C8TA11029H

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