International Journal of Electrochemical Science最新文献

{"title":"Uniformity enhancement of flow field through optimizing nozzle structure for jet electrochemical machining","authors":"","doi":"10.1016/j.ijoes.2024.100809","DOIUrl":"10.1016/j.ijoes.2024.100809","url":null,"abstract":"<div><div>To improve the processing quality during the Jet electrochemical machining (JECM) process, a single-orifice nozzle and dual-orifice nozzles with different inclination angles were designed, where the fluid dynamic behavior was numerically simulated. Then, through the L₄₉ (7⁴) orthogonal design and error analysis, the influence of nozzle dimension on the flow field characteristics was analyzed. Finally, the nozzle with optimal structure and dimension was obtained and validated by experiment. Results show that the dual-orifice nozzles had better flow field uniformity than the single-orifice nozzle. In the dual-orifice nozzle, the increase of the inlet inclination angle can improve the flow field uniformity. The influence of the nozzle dimension parameters on the flow field uniformity is prioritized as follows: the outlet slit width &gt; upper chamber diameter &gt; the height of the inflow chamber &gt; the height of the transition chamber. After optimization, the optimal dimension parameters were obtained under the upper chamber diameter of 16 mm, the jet outlet slit width of 0.4 mm, the height of the inflow chamber of 7 mm, and the height of the transition chamber of 23 mm. The flow velocity dispersions under the pressures of 0.3, 0.4, and 0.5 MPa can be reduced by 25.41 %, 25.17 %, and 28.16 %. The findings can help understand the flow behavior and guide the structure optimization for improving JECM quality.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142320102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advances in transition metal oxide cathodes for zinc-ion batteries – A review focusing on safety and toxicity","authors":"","doi":"10.1016/j.ijoes.2024.100804","DOIUrl":"10.1016/j.ijoes.2024.100804","url":null,"abstract":"<div><div>Aqueous Zinc-ion Batteries (AZIBs) have garnered significant attention as promising alternatives to conventional lithium-ion batteries, owing to their inherent advantages such as high energy density, affordability, and non-flammability. Despite their potential, achieving high-performance cathode materials remains a challenge, necessitating a delicate balance between electrochemical properties and considerations of environmental toxicity and human health. This comprehensive review delves into recent advancements in transition metal oxide cathodes, focusing on their potential to address safety, toxicity, cost, and feasibility concerns. The importance of toxicity has emerged prominently in recent years, fueled by increasing awareness of environmental and health impacts associated with energy storage technologies. Meanwhile, feasibility encompasses not only the electrochemical performance of cathode materials but also considerations of scalability, cost-effectiveness, and compatibility with large-scale energy storage applications. The review begins with a brief yet focused overview of Zinc batteries, providing an accurate classification, foundational understanding, and overview of current challenges. It then delves into contemporary concerns surrounding toxicity, cost, and feasibility of transition metal oxide cathode materials. In subsequent sections, various works involving oxide cathodes of Ti, Fe, Mn, and other relevant transition metals are thoroughly examined for their ability to meet these considerations. Lastly, key strategies directed towards mitigation of toxicity issues and cost-effective development of ZIBs is provided along with valuable insights into the future direction of AZIB research and development.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1452398124003468/pdfft?md5=28b60b3f4222f7d147e056add27d4d73&pid=1-s2.0-S1452398124003468-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cr-doped NiO nanocrystals anchored on wood-based carbon for enhanced electrocatalytic oxidation of urea","authors":"","doi":"10.1016/j.ijoes.2024.100805","DOIUrl":"10.1016/j.ijoes.2024.100805","url":null,"abstract":"<div><p>The urea oxidation reaction (UOR) has potential application in water electrolysis-assisted hydrogen generation, fuel cells, and the treatment of urea-containing wastewater. In this work, the composite (Cr-NiO/CWF) was synthesized by anchoring Cr and NiO onto carbonized wood fiber (CWF) by hydrothermal method combined with pyrolysis, utilizing biomass wood fiber (WF) as the precursor for the carbon substrate. The optimal Cr-NiO/CWF has significant UOR activity, and the current density (j) can reach 310.40 mA cm⁻² at 1.67 V, while the required potential for UOR is 1.36 V at the j value of 10 mA cm⁻². After 12 h of long-term chronoamperometry (CA) testing, the j retention rate of Cr-NiO/CWF is 90 %. The excellent properties of Cr-NiO/CWF composites are mainly ascribed to the effective modulation of the electronic structure by Cr doping, which optimizes the adsorption behavior of the reactants and products. Cr-NiO nanoparticles enhance the carrier mobility and accelerate the electron transfer rate between Cr-NiO and carbon substrate. Moreover, Cr-NiO nanoparticles are tightly anchored onto the nitrogen-doped carbon substrate to enhance the stability of the composite.</p></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S145239812400347X/pdfft?md5=3ce343f8d16b6686b2fbb81fd4693276&pid=1-s2.0-S145239812400347X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142270613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design and numerical analysis of a Y-shaped flow channel for enhanced hydrogen production in solid oxide electrolysis cells","authors":"","doi":"10.1016/j.ijoes.2024.100806","DOIUrl":"10.1016/j.ijoes.2024.100806","url":null,"abstract":"<div><div>Hydrogen produced from renewable sources is crucial for reducing carbon emissions and mitigating the impact of greenhouse gases. Solid Oxide Electrolysis Cells (SOECs) offer high efficiency in this regard, making them a focus of significant research interest. This study introduces a novel approach using numerical simulations to design a Y-shaped flow channel interconnector for the first time. A three-dimensional multiphysics coupling mathematical model is developed to investigate hydrogen production via water electrolysis in SOECs. Comparative analysis between the new Y-shaped flow channel and traditional straight channel SOEC models covers component distribution, temperature field, electrolyte current density, and thermal stress. Simulation results indicate a 20.72 % increase in hydrolysis rate with the Y-shaped channel under a counter-flow arrangement compared to the conventional straight channel. The rhombic connectors in the Y-shaped design lead to a more uniform current density distribution, with a maximum current density higher by approximately 647 A/m² than the straight channel. However, the Y-shaped channel exhibits higher temperatures, resulting in larger thermal stress.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Porosity and permeability optimization of PEMFC cathode gas diffusion layer based on topology algorithm","authors":"","doi":"10.1016/j.ijoes.2024.100803","DOIUrl":"10.1016/j.ijoes.2024.100803","url":null,"abstract":"<div><div>The gas diffusion layer (GDL) is a crucial component in proton exchange membrane fuel cells (PEMFCs), significantly affecting mass transport and overall cell performance. Due to the pronounced pressure gradients and uneven mass transfer between the inlet and outlet of the serpentine flow field, this study proposes the design of a GDL with a concentration gradient to optimize performance. Leveraging topological optimization algorithms, the research focuses on enhancing the mass transport properties and improving cell efficiency. The optimization process considers the pressure distribution, oxygen concentration, and water content within the serpentine flow field as boundary conditions. By optimizing the porosity and permeability of the GDL in different regions, the study aims to enhance the GDL's mass transport capabilities. Simulation results demonstrate that initializing the porosity at 1 provides superior optimization, significantly enhancing mass transfer and overall cell performance. Although increased permeability contributes to improved mass transport, its impact is less significant compared to porosity optimization. Therefore, GDL porosity is identified as the dominant factor in enhancing cell performance, while permeability adjustments play a secondary role.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A study on the corrosion inhibition impact of newly synthesized quinazoline derivatives on mild steel in 1.0 M HCl: Experimental, surface morphological (SEM-EDS and FTIR) and computational analysis","authors":"","doi":"10.1016/j.ijoes.2024.100795","DOIUrl":"10.1016/j.ijoes.2024.100795","url":null,"abstract":"<div><div>Two new quinazoline derivatives were investigated in this research, namely 12-(4-methoxyphenyl) and 3,3-dimethyl-12-(4-nitrophenyl)-3,4,5,12-tetrahydrobenzo[4,5]imidazo[2, 1-<em>b</em>]quinazolin-1(2 H)-one (<strong>Q-NO</strong>_{<strong>2</strong>}). In 1 M hydrochloric acid (HCl), −3,3-dimethyl-3,4,5,12-tetrahydrobenzo[4,5]imidazo[2,1-<em>b</em>]quinazolin-1(2 H)-one (<strong>Q-OMe</strong>) proved to be an extremely effective corrosion inhibitor for mild steel. The maximum inhibition efficiencies of 94.7 % for <strong>Q-NO</strong>_{<strong>2</strong>} and 96.7 % for <strong>Q-OMe</strong> were achieved when the performance of the inhibitors was evaluated using potentiodynamic polarization (PDP), electrochemical frequency modulation (EFM) and electrochemical impedance spectroscopy (EIS). According to these findings, the <strong>Q-NO</strong>_{<strong>2</strong>} and <strong>Q-OMe</strong> molecules have a remarkable ability to generate a dense, resistant protective film on the mild steel surface. This protective film acted as a barrier, effectively blocking the penetration of corrosive ions and their interaction with the mild steel substrate. The adsorption characteristics of these inhibitors on the mild steel surface conform to the Langmuir adsorption isotherm. PDP experiments show that <strong>Q-NO</strong>_{<strong>2</strong>} and <strong>Q-OMe</strong> act as mixed-type inhibitors for mild steel in 1.0 M HCl. Surface characterization by energy dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM) determined that a protective layer had formed on the steel surface, preventing corrosion. The experimental results were corroborated by theoretical insights from density functional theory (DFT), which further clarified the molecular adsorption processes. This work highlights the potential of <strong>Q-NO</strong>_{<strong>2</strong>} and <strong>Q-OMe</strong> as effective inhibitors to protect mild steel in acidic situation.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effect of Zn2+ on the positive electrolyte for all-vanadium redox flow battery","authors":"","doi":"10.1016/j.ijoes.2024.100801","DOIUrl":"10.1016/j.ijoes.2024.100801","url":null,"abstract":"<div><p>In this work, the effects of Zn²⁺ on the electrochemical activity of positive electrolyte were researched by cyclic voltammetry(CV), AC impedance. The results of CV showed that the positive electrolyte containing 2 wt% Zn²⁺ as additive had the best electrochemical activity. Compared with the electrolyte without any additive, the electrolyte with 2 wt% Zn²⁺ obviously enhanced electrochemical activity and reversibility of Farady reaction. In addition, the kinetic study of the mass transfer process indicated that the diffusion coefficient obviously increased. Besides, the results of electrochemical impedance spectroscopy implied that the internal charge transfer resistance of the electrolyte electrochemical system containing Zn²⁺ as an additive was significantly reduced. This indicated that the charge transfer was significantly accelerated, which was beneficial to the improvement of the electrochemical activity. Moreover, the study of the electrolyte stability showed that the electrolyte containing Zn²⁺ had superior stability yet after 30 cycles’ scanning.</p></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1452398124003432/pdfft?md5=088d194760c54b6a8625f23f7c8237fd&pid=1-s2.0-S1452398124003432-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comprehensive electrochemical and machine learning-based study of rancidity in four edible oils over various storage periods","authors":"","doi":"10.1016/j.ijoes.2024.100799","DOIUrl":"10.1016/j.ijoes.2024.100799","url":null,"abstract":"<div><p>This study investigates the rancidity development in four edible oils (corn, mustard, soybean, and sunflower) over a 12-month storage period using a novel approach combining electrochemical techniques and machine learning. Cyclic voltammetry, electrochemical impedance spectroscopy, and differential pulse voltammetry were employed to characterize oil oxidation. Electrochemical parameters showed strong correlations with traditional chemical indicators, such as the DPV peak current at +0.2 V with p-anisidine value (r = 0.94, p &lt; 0.001). A Random Forest model, trained on electrochemical data, accurately predicted Total Oxidation (TOTOX) values, achieving an R² of 0.96 and RMSE of 2.18 for the test set. The model effectively captured oxidation trends across oil types, with the highest accuracy for mustard oil (MAE: 1.21) and lower performance for sunflower oil (MAE: 2.15). Feature importance analysis revealed charge transfer resistance and DPV peak currents as the most influential predictors. This approach offers rapid, non-destructive assessment of oil quality, potentially improving quality control in the food industry. However, challenges such as electrode fouling and complex sample preparation need to be addressed for practical implementation.</p></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1452398124003419/pdfft?md5=0f08bb25c65699c6f2ee0d6a7c61e071&pid=1-s2.0-S1452398124003419-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142270611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Model-free detection and quantitative assessment of micro short circuits in lithium-ion battery packs based on incremental capacity and unsupervised clustering","authors":"","doi":"10.1016/j.ijoes.2024.100794","DOIUrl":"10.1016/j.ijoes.2024.100794","url":null,"abstract":"<div><p>Timely diagnosis of micro short circuit (MSC) faults is crucial for ensuring the safe operation of lithium-ion battery energy storage systems. Existing diagnostic methods face limitations such as high dependency on battery models, difficulty in determining accurate diagnostic thresholds, or low computational efficiency. This work presents a model-free approach for the detection and quantitative assessment of MSCs in lithium-ion battery packs, with incremental capacity (IC) and unsupervised clustering. First, the IC is extracted from charging voltage data to effectively characterize MSC faults in lithium-ion batteries. Next, principal component analysis is used to map the high-dimensional feature space onto a two-dimensional plane to facilitate fault detection and result visualization. Then, an unsupervised clustering algorithm is employed for anomaly detection to identify MSC cells within the battery pack. For the detected MSC cells, a method based on the maximum charging voltage difference between adjacent cycles is designed to estimate the MSC resistance, quantitatively assessing the severity and evolution stage of the MSC. Experimental results show that the accuracy of MSC detection is 99.17 % and the minimum relative error of short-circuit resistance estimation is 1.20 %, which demonstrates the effectiveness and feasibility of the proposed method.</p></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1452398124003353/pdfft?md5=2d5dc2144a829a663587ccffc24608ca&pid=1-s2.0-S1452398124003353-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel electrochromic-supercapacitor device based on P(TPACz)/WO3-PDA nanocomposite film","authors":"","doi":"10.1016/j.ijoes.2024.100798","DOIUrl":"10.1016/j.ijoes.2024.100798","url":null,"abstract":"<div><p>Organic–inorganic composites of (<em>E</em>)-3,5-di(9 H-carbazol-9-yl)-N-(4-(diphenylamino)benzylidene)aniline/dopamine-modified WO₃ (P(TPACz)/WO₃-PDA) were prepared by electrochemical polymerisation. The as-prepared P(TPACz)/WO₃-PDA composites showed good electrochromic and electrochemical performance. The prominent electrochemical performance of P(TPACz)/WO₃-PDA represents a high areal capacitance (32.15 mF cm⁻² at 0.1 mA cm⁻²) and wide range of potential windows (-2.0−1.6 V). Additionally, symmetric supercapacitor devices based on P(TPACz)/WO₃-PDA composite films were successfully constructed, which exhibited a high specific capacitance (13.88 mF cm⁻² at 0.02 mA cm⁻²) and an energy density of 7.71 × 10⁻³ mWh cm⁻² in n-doped station. The remarkable electrochromic and electrochemical performances are due to the synergy between the organic polymer and WO₃-PDA. A complete large-area composite film structure with high conductivity promises fast electronic transport. This study provides a method for preparing multifunctional composite electrode materials, offering technical support for intelligent displays and energy storage technologies.</p></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1452398124003407/pdfft?md5=5a2f1df253a9dc348d4fda8baa899468&pid=1-s2.0-S1452398124003407-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142272569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}