Abstract:Considering the limit of resources and the frequent use of energy, energy storage is nowadays the subject that everyone cares about. In the present work, we investigate trijunction metal oxides as supercapacitor electrode for energy storage application. A MnO 2 /NiO/ZnO trijunction electrode is synthesized for the first time using a successive three electrochemical deposition steps onto stainless steel (SS) substrate. This approach can effectively yield a good distribution and adhesion of all metal oxides onto… Show more
“…The most popular conducting substrates are still metal-based, such as nickel foams (Ahmad & Shah, 2022;Qi et al, 2022;Tao, He, et al, 2022), stainless steel foils or meshes built of metals such as Al, Ti, Ni, and Cu (Alimi et al, 2022;Cho et al, 2022;D. Huang et al, 2022;Lei et al, 2019;J.-H. Lin & Du, 2021;X.…”
Flexible supercapacitors with hybrid anodes have gained significant attention in energy storage research, owing to their remarkable specific capacitance, outstanding power and energy densities, rapid charging‐to‐discharging rates, and superior flexibility. However, bare carbonaceous anodes exhibit limited capacitive performance, resulting in low energy density. To address this issue, recent efforts focus on hybridizing carbonaceous anodes with metal‐based active materials to enhance their electrochemical performance. This part of review comprehensively outlines the available options of carbonaceous materials used as substrates for constructing hybrid free‐standing flexible anodes. Various persuasive approaches are discussed, highlighting their effectiveness in enhancing the electrochemical performance of carbonaceous substrates. In addition, this piece of work provides an insight into the possible configurations of such devices for real‐life applications.This article is categorized under:
Emerging Technologies > Energy Storage
Emerging Technologies > Materials
“…The most popular conducting substrates are still metal-based, such as nickel foams (Ahmad & Shah, 2022;Qi et al, 2022;Tao, He, et al, 2022), stainless steel foils or meshes built of metals such as Al, Ti, Ni, and Cu (Alimi et al, 2022;Cho et al, 2022;D. Huang et al, 2022;Lei et al, 2019;J.-H. Lin & Du, 2021;X.…”
Flexible supercapacitors with hybrid anodes have gained significant attention in energy storage research, owing to their remarkable specific capacitance, outstanding power and energy densities, rapid charging‐to‐discharging rates, and superior flexibility. However, bare carbonaceous anodes exhibit limited capacitive performance, resulting in low energy density. To address this issue, recent efforts focus on hybridizing carbonaceous anodes with metal‐based active materials to enhance their electrochemical performance. This part of review comprehensively outlines the available options of carbonaceous materials used as substrates for constructing hybrid free‐standing flexible anodes. Various persuasive approaches are discussed, highlighting their effectiveness in enhancing the electrochemical performance of carbonaceous substrates. In addition, this piece of work provides an insight into the possible configurations of such devices for real‐life applications.This article is categorized under:
Emerging Technologies > Energy Storage
Emerging Technologies > Materials
“…The ANN model has superior performance, as seen by its low percentage error of 0.14%. Additionally, Alimi et al [105] investigated an ANN model to achieve precise forecasting of the CV characteristics of trijunction supercapacitor electrodes composed of MnO 2 , NiO, and ZnO. The obtained R 2 value of 0.999 indicates a high level of accuracy in their predictions.…”
Supercapacitors (SCs) are gaining attention for Internet of Things (IoT) devices because of their impressive characteristics, including their high power and energy density, extended lifespan, significant cycling stability, and quick charge–discharge cycles. Hence, it is essential to make precise predictions about the capacitance and lifespan of supercapacitors to choose the appropriate materials and develop plans for replacement. Carbon-based supercapacitor electrodes are crucial for the advancement of contemporary technology, serving as a key component among numerous types of electrode materials. Moreover, accurately forecasting the lifespan of energy storage devices may greatly improve the efficient handling of system malfunctions. Researchers worldwide have increasingly shown interest in using machine learning (ML) approaches for predicting the performance of energy storage materials. The interest in machine learning is driven by its noteworthy benefits, such as improved accuracy in predictions, time efficiency, and cost-effectiveness. This paper reviews different charge storage processes, categorizes SCs, and investigates frequently employed carbon electrode components. The performance of supercapacitors, which is crucial for Internet of Things (IoT) applications, is affected by a number of their characteristics, including their power density, charge storage capacity, and cycle longevity. Additionally, we provide an in-depth review of several recently developed ML-driven models used for predicting energy substance properties and optimizing supercapacitor effectiveness. The purpose of these proposed ML algorithms is to validate their anticipated accuracies, aid in the selection of models, and highlight future research topics in the field of scientific computing. Overall, this research highlights the possibility of using ML techniques to make significant advancements in the field of energy-storing device development.
“…supercapacitor applications [21][22][23], and water splitting [24][25][26]. In this context, Wang and colleagues have successfully built a machine learning (ML) model to predict the doping effect of 17 metal dopants into hematite (Fe 2 O 3 ), a prototype photoelectrode material [27].…”
Since the discovery of photoelectrochemical (PEC) water splitting with titanium dioxide electrodes in the presence of ultraviolet light, much work has been conducted to build an effective PEC water splitting system and develop novel photoelectrodes. Using a facile and controllable electrodeposition method, a thin tungsten trioxide (WO3) film electrode onto a stainless steel (SS) substrate was synthetized. The effect of the deposition time on the structural, morphological, optical, and electrical properties of the as-grown WO3 thin films was assessed. XRD spectra of the obtained films reveal the polycrystalline nature of WO3 with a triclinic phase and exhibit a sharp transition to the (002) plane when the deposition time was extended beyond 10 min. The surface morphology showed a remarkable change in the grain size, thickness, and surface roughness when varying the deposition time. UV–Vis spectrophotometry revealed that the optical band gap values of WO3 decreased from 1.78 to 1.36 eV by extending the electrodeposition duration from 10 to 30 min, respectively. Notably, as indicated from the PEC measurements, the obtained photoelectrode exhibited the effects of the deposition time on the photocurrent density, and the maximum value obtained was around 0.07 mA cm−2 for the sample deposited at 10 min. Finally, this study presents for the first time an artificial neural network model to predict the PEC behavior of the prepared photoanode, with a highly satisfactory performance of less than 0.05% error. The low cost and simply synthetized WO3/SS electrode with superior electrochemical performance and the excellent correlation between the experimental and theoretical results demonstrate its potential for practical application in water splitting and hydrogen production.
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