1. Facile synthesis and characterization of Bi13S18I2 films as a stable supercapacitor electrode material
- Author
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Tianyue Li, Job H. J. Thijssen, John Mallows, Neil Robertson, Alba Franco Gonzalez, and Keir Adams
- Subjects
Supercapacitor ,Materials science ,Renewable Energy, Sustainability and the Environment ,Annealing (metallurgy) ,chemistry.chemical_element ,02 engineering and technology ,General Chemistry ,Electrolyte ,021001 nanoscience & nanotechnology ,Capacitance ,law.invention ,Bismuth ,Capacitor ,X-ray photoelectron spectroscopy ,Chemical engineering ,chemistry ,law ,Electrode ,General Materials Science ,0210 nano-technology - 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.
- Published
- 2019