Hopping Electrochemical Supercapacitor Performance of Ultrathin BiOCl Petals Grown by a Room-Temperature Soft-Chemical Process

Abstract

The use of easy synthesis methodology, high performance, and stable electrode materials is mandatory while developing potential energy storage devices on a mass scale. In the present work, room-temperature operating, a simple solution method is employed for obtaining ultrathin bismuth oxide chloride (BiOCl) supercapacitor electrode material over 3D nickel-foam. This free-standing BiOCl ultrathin petal-type electrode material was characterized for confiming the crystal strcture, surface morphology, and surface area by various characterization tools and then is envisaged in electrochemical supercapacitor application. Electrochemical analysis performed by several means has revealed an optimum specific capacitance of 379 F·g–1 (at current density of 1.25 A g–1). The symmetric electrochemical supercapacitor device assembled using two identical BiOCl electrodes in the presence of 6 M KOH electrolyte has demonstrated an excellent energy density of 12 Wh kg–1 and 1125 W kg–1 power density, and about 80% retention over 5000 cycles. Red, yellow, and green LEDs were ignited for ∼10 min glowing time using three BiOCl//BiOCl symmetric devices connecting in series, and it thus has a potential for accelerating energy storage devices like electrical vehicles and mobile phones.

Two-Dimensional Layered Bismuthene/Antimonene Nanocomposite as a Potential Electrode Material for the Fabrication of High-Energy Density Hybrid Supercapacitors

“…The energy and power densities are the key parameters that determine the practical utilization of the supercapacitor device based on its electrochemical performance. The Ragone plot determines the relation between the energy and power densities of the fabricated supercapacitor compared with previously reported literature as depicted in Figure f. − The fabricated Biene/Sbene//AC HSC delivers competitive energy densities of 131.44, 126.75, 119, 69.7, and 43.1 Wh/kg, and their corresponding power densities are 1678, 2700, 5950.2, 6340.7, and 8262.2 W/kg at current densities of 2, 4, 6, 8, and 10 A/g respectively. To elucidate the practical applicability of the Biene/Sbene//AC HSC, an experiment was performed by connecting the red LED and charging it for 30 s using a 9 V battery .…”

One-pot room-temperature synthesis of a BiOCl hierarchical microsphere assembled from nanosheets with exposed {001} facets for enhanced photosensitized degradation

“…Semiconductor photocatalytic technology, as one of the most appealing green and environmentally benign technologies, has been explored to tackle environmental issues involving the elimination of organic pollutants, decomposition of water to hydrogen, and CO 2 photo-reduction for fuels. 2,3 Until now, abundant photocatalysts have been widely investigated for sewage treatment and air purication.…”

Toward the Proper Selection of Carbon Electrode Materials for Energy Storage Applications: Experimental and Theoretical Insights

“…On the other hand, the pseudo and battery-like types are the characteristics of Faradaic materials that allow ion intercalation or redox reactions. , Although Faradaic materials enjoy a higher specific energy than the EDL counterparts, they usually suffer from lower power density and cycling instability due to the decomposition and/or corrosion of the electrode materials in high potential windows. In this regard, hybrid electrodes that contain both carbon materials and faradic materials have been proposed. − Tian et al studied MoS 2 /MoO 2 nanoparticles grown on the surface of CNTs, which showed a capacitance of 228.4 F/g at 0.5 A/g, a specific energy of 11.88 Wh/kg, and a specific power of 2 kW/kg with high cycling stability in KOH electrolyte at 0.55 V . Samuel et al used a Zn 2 SnO 4 /SnO 2 /CNTs nanocomposite as a supercapacitor electrode that exhibited a capacitance of 260 F/g at 10 A/g in 6 M KOH and a potential window of 1 V .…”