Recent Developments in Electrodeposition of Transition Metal Chalcogenides‐Based Electrode Materials for Advance Supercapacitor Applications: A Review
Subhashree Mohapatra,
Himadri Tanaya Das,
Bankim Chandra Tripathy
et al.
Abstract:High‐performance supercapacitive electrode materials have received significant attention from researchers worldwide, thus aiming for comparable performance similar to the extensively used rechargeable batteries. For emerging energy storage technologies like flexible supercapacitors, transition metal chalcogenides (TMCs) have been in the spotlight due to their promising electrochemical features compared to other electrode materials. Among the synthesis techniques, electrodeposition‐mediated preparation of thin … Show more
“…Figure S5d (Supporting Information) further confirms the electrochemical stability of the prepared electrode for the fabricated device, where distinct redox peaks were visualized in the CV curve even after 5000 cycles of continuous charge–discharge cycles. This shows the metal sulfides as potent materials for a broad range of applications. , …”
A trimetallic heterojunction-derived Co 3 S 4 /NiS 2 / Cu 2 S with different ratios through a two-step hydrothermal method was successfully synthesized, showing multifunctional properties such as excellent electrochemical behavior and high photocatalytic activity. Both electrochemical and photocatalytic performances were optimized by adjusting the concentration of Cu without any change in Co and Ni concentrations. Among the synthesized nanocomposites, CNCS-0.15 (Co 3 S 4 0.5 /NiS 2 0.5 / Cu 2 S 0.15 ) depicted the maximum specific capacity of 464.16 C g −1 at 1 A g −1 as revealed from electrochemical measurements. Further for real-time usage, assembling of a hybrid supercapacitor CNCS-0.15(+)||activated carbon(−) furnished an energy density of 84.95 W h kg −1 at a power density of 1134 W kg −1 with good capacity retention of 93.64% for 5000 cycles. In addition, CNCS-0.15 also displayed remarkable photocatalytic performance under visible light illumination by utilizing Congo red (CR) dye. It could effectively degrade 91% of CR (40 mg L −1 ) through a double Zscheme mechanism owing to the charge carriers' availability with higher redox ability. The Mott−Schottky analysis along with the scavenging experiment confirmed the involvement of h + and O 2 −. radicals in the photodegradation. Due to highly interconnected nanoflake architectures, CNCS-0.15 holds a promising application as a supercapacitor electrode and visible light active photocatalyst.
“…Figure S5d (Supporting Information) further confirms the electrochemical stability of the prepared electrode for the fabricated device, where distinct redox peaks were visualized in the CV curve even after 5000 cycles of continuous charge–discharge cycles. This shows the metal sulfides as potent materials for a broad range of applications. , …”
A trimetallic heterojunction-derived Co 3 S 4 /NiS 2 / Cu 2 S with different ratios through a two-step hydrothermal method was successfully synthesized, showing multifunctional properties such as excellent electrochemical behavior and high photocatalytic activity. Both electrochemical and photocatalytic performances were optimized by adjusting the concentration of Cu without any change in Co and Ni concentrations. Among the synthesized nanocomposites, CNCS-0.15 (Co 3 S 4 0.5 /NiS 2 0.5 / Cu 2 S 0.15 ) depicted the maximum specific capacity of 464.16 C g −1 at 1 A g −1 as revealed from electrochemical measurements. Further for real-time usage, assembling of a hybrid supercapacitor CNCS-0.15(+)||activated carbon(−) furnished an energy density of 84.95 W h kg −1 at a power density of 1134 W kg −1 with good capacity retention of 93.64% for 5000 cycles. In addition, CNCS-0.15 also displayed remarkable photocatalytic performance under visible light illumination by utilizing Congo red (CR) dye. It could effectively degrade 91% of CR (40 mg L −1 ) through a double Zscheme mechanism owing to the charge carriers' availability with higher redox ability. The Mott−Schottky analysis along with the scavenging experiment confirmed the involvement of h + and O 2 −. radicals in the photodegradation. Due to highly interconnected nanoflake architectures, CNCS-0.15 holds a promising application as a supercapacitor electrode and visible light active photocatalyst.
Rational designing of multicomponent selenide‐based composites such as Co9Se8/Ni3Se4/Cu2Se (CNCD) is synthesized through a simplistic hydrothermal method. Several standard characterization techniques are utilized to study the structural, morphological and elemental features of the obtained samples with varying selenide content. Both electrochemically and photocatalytic performance are amplified at an optimized selenide content denoted as CNCD‐0.5 due to its favourable characteristics and morphology. From the electrochemical measurements, the battery‐type performance of the CNCD‐0.5 is established from the well‐distinguished redox peaks. For practical utility, the assembled CNCD‐0.5 (+) // AC (−) device delivered an energy density of 35.97 Wh kg−1 at a power density of 1210.86 W kg−1 with a capacity retention of 91% for 5000 cycles of uninterrupted charge–discharge. Further, the photo‐Fenton‐based degradation experiments are assessed by demineralization of cationic RhodamineB (RhB) and anionic Tartrazine (Tz) dye using H2O2 with the minimal dosage of catalyst (0.3 g L−1). At an optimized concentration of H2O2, CNCD‐0.5 can degrade 97.14% of RhB (40 mg L−1) and 94.77% of Tz (40 mg L−1) for 120 min of visible‐light illumination. Such designing of multinary metal selenides‐based nanocomposites holds promising potential for multifunctional applications due to the synergistic advancement in the composite properties.
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