Electrochemistry Communications最新文献

{"title":"A ternary SnSb/P/EG composite anode enables high-rate capability and stable low-temperature cycling for Lithium storage","authors":"Guozheng Ma ,&nbsp;Kaiqiang Song ,&nbsp;Xingyu Xiong ,&nbsp;Lingshu Dong ,&nbsp;Yuchong Ge ,&nbsp;Zhongchen Lu ,&nbsp;Xiaoyun Gao ,&nbsp;Renzong Hu","doi":"10.1016/j.elecom.2025.108037","DOIUrl":"10.1016/j.elecom.2025.108037","url":null,"abstract":"<div><div>Lithium-ion batteries (LIBs) face challenges in low-temperature environments, including hindered lithium-ion transport, poor capacity retention and inadequate charging capability. The limited capacity (372 mAh g⁻¹) and suboptimal low-temperature performance of graphite anode restricts the broader application of LIBs across various fields. Herein, a SnSb/P/EG composite anode material was prepared via a simple ball-milling method. The SnSb/P/EG composite anode delivers a high specific capacity of 815 mAh g⁻¹ at 0.2 A g⁻¹and 544 mAh g⁻¹ at 10 A g⁻¹ under 30 °C. Notably, under −30 °C, it delivers a high reversible capacity of 643 mAh g⁻¹ with a high retention of 91.5 % after 100 cycles. Its exceptional low-temperature performance is attributed to enhanced pseudocapacitive characteristics and the enhanced reaction kinetics in the amorphous Li-alloys in the ternary composite, offering novel insights for the design of LIBs anode materials for low-temperature applications.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108037"},"PeriodicalIF":4.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seven-parameter PEMFC model optimization using an battlefield optimization algorithm","authors":"Manish Kumar Singla ,&nbsp;S.A. Muhammed Ali ,&nbsp;Jyoti Gupta ,&nbsp;Pradeep Jangir ,&nbsp;Arpita ,&nbsp;Ramesh Kumar ,&nbsp;Reena Jangid ,&nbsp;Mohammad Khishe","doi":"10.1016/j.elecom.2025.108033","DOIUrl":"10.1016/j.elecom.2025.108033","url":null,"abstract":"<div><div>Precise modeling of Proton Exchange Membrane Fuel Cells (PEMFCs) requires accurate identification of key parameters, which are often unavailable from manufacturers but crucial for predicting fuel cell performance. The system relies on seven key parameters to determine activation and ohmic and concentration overpotential values through ξ1, ξ2, ξ3, ξ4, λ, Rc, and β. The Battlefield Optimization Algorithm (BfOA) represents a new optimization method that finds these seven essential PEMFC parameters effectively. Using Sum Squared Error (SSE) to minimize the difference between estimated and actual cell voltages, BfOA outperformed other optimization algorithms in determining parameters for six PEMFC models under varying operating conditions. The optimized parameters enabled accurate prediction of I-V and P<img>V curves, closely matching experimental data. BfOA's efficiency and robustness make it well-.</div><div>suited for real-time fuel cell modeling. Its effectiveness as a method for precise PEMFC device analysis within electronic component simulators is demonstrated. Future development will explore BfOA's compatibility with other fuel cell technologies, incorporate real-time data capabilities, and implement the algorithm in embedded systems for real-time PEMFC monitoring and control.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108033"},"PeriodicalIF":4.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144880404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Urea-Tris doped 3D graphene for high-stability supercapacitors","authors":"Xuanhe Liu ,&nbsp;Baiqing Sun ,&nbsp;Lehao Lin ,&nbsp;Gaimei Zhang ,&nbsp;Hui Li ,&nbsp;Jiazi Shi ,&nbsp;Min Wu ,&nbsp;Dongdong Wang ,&nbsp;Jiandong Lu ,&nbsp;Kang Du ,&nbsp;Xiaoli Song","doi":"10.1016/j.elecom.2025.108004","DOIUrl":"10.1016/j.elecom.2025.108004","url":null,"abstract":"<div><div>The commercialization of supercapacitors hinges critically on developing low-cost electrode materials capable of simultaneously delivering high energy density and long-term stability. To address this challenge, we developed a dual‑nitrogen doping strategy using tris(hydroxymethyl)aminomethane (Tris) and urea to fabricate three-dimensional nitrogen-doped graphene (URNG) through a one-step hydrothermal process. Characterization of the material reveals that the optimized nitrogen conformation of URNG has a 2.07 % increase in pyrrole-N content compared to single nitrogen-source doped graphene (NG), a change that significantly enhances the charge storage capacity while maintaining structural integrity. Electrochemical measurements demonstrate that the assembled symmetric supercapacitor achieves a high energy density of 57.2 Wh·kg⁻¹ at a power density of 670 W·kg⁻¹. The URNG electrodes deliver a specific capacitance of 194.2 F·g⁻¹ at 0.5 A·g⁻¹ (17.1 % higher than NG) while maintaining 87 % capacitance retention after 5000 cycles. The practical applicability of this material was successfully demonstrated by powering a 1.8 V LED device. This work not only provides a facile synthesis strategy but also offers fundamental insights into nitrogen configuration control for advanced energy storage systems.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108004"},"PeriodicalIF":4.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144772150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Direct electron transfer-type bioelectrocatalytic dioxygen reduction with copper efflux oxidase lacking type I copper","authors":"Taiki Adachi ,&nbsp;Toshitada Takei ,&nbsp;Kenji Kano ,&nbsp;Satoshi Yamashita ,&nbsp;Kunishige Kataoka ,&nbsp;Keisei Sowa","doi":"10.1016/j.elecom.2025.108036","DOIUrl":"10.1016/j.elecom.2025.108036","url":null,"abstract":"<div><div>Copper efflux oxidase (CueO) is a direct electron transfer (DET)-type bioelectrocatalyst used for dioxygen (O₂) reduction. Type I copper (T1Cu) has been suggested to be essential for donating electrons to trinuclear copper center (TNC) during the catalytic cycle of CueO. However, T1Cu-deleted (T1D) variants have not yet been characterized in DET-type reactions. This study investigated the bioelectrochemical properties of the T1D CueO variants, C500S and C500S/E506Q. Both variants showed a significant catalytic current representing DET via TNC at the Ketjen black-modified electrode, whereas T1Cu appeared to accelerate the catalytic cycle of CueO. Additionally, C500S/E506Q showed a 10-fold higher activity than C500S. Through kinetic analysis of the voltammograms, the reorganization energy of TNC was estimated to be lowered owing to the E506Q mutation, resulting in fast DET of C500S/E506Q. These findings can help improve the DET-type reactions involving multicopper oxidases.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108036"},"PeriodicalIF":4.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Actinobacillus succinogenes in bioelectrochemical systems – Comparative study of redox mediators","authors":"Jan-Niklas Hengsbach ,&nbsp;Marcel Cwienczek ,&nbsp;Janik Haffelder ,&nbsp;Nils Tippkötter ,&nbsp;Roland Ulber","doi":"10.1016/j.elecom.2025.108003","DOIUrl":"10.1016/j.elecom.2025.108003","url":null,"abstract":"<div><div>A promising strategy to enhance biotechnological succinate production with <em>Actinobacillus succinogenes</em> is the fermentation in bioelectrochemical systems (BES), where mediated extracellular electron transfer (MEET) plays a key role. In this context, the choice of redox mediator (RM) is important. However, current studies show a limited selection of RMs, which have only rarely been investigated for <em>A. succinogenes</em>. This study therefore analyses different RMs regarding their efficiency and compatibility with <em>A. succinogenes</em> in cathodic systems. In addition to key parameters such as toxicity, stability and redox potential, the total turnover number (TTN) was used as a performance indicator. Among the RMs tested, neutral red proved to be the most efficient mediator with a TTN value of 160.39 at a concentration of 0.1 mM and 23.32 ± 3.34 at 0.5 mM over 72 h. In contrast, riboflavin, safranin O, resazurin and methylene blue showed far poorer performance due to low TTN values, high toxicity or low stability. In addition, active secretion of endogenous RMs could most likely be excluded. The results prove that neutral red is currently the most suitable RM for the process and at the same time illustrate the considerable potential for optimisation in the development of ideal redox mediators for cathodic electro-fermentation.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108003"},"PeriodicalIF":4.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reduced gas diffusion resistance via modification of negatrode morphology for steam/CO2 co-electrolysis SOEC","authors":"Hirofumi Sumi ,&nbsp;Mizuki Momai ,&nbsp;Yohei Tanaka ,&nbsp;Toshiaki Matsui","doi":"10.1016/j.elecom.2025.108022","DOIUrl":"10.1016/j.elecom.2025.108022","url":null,"abstract":"<div><div>Solid oxide electrolysis cells (SOECs) exhibit remarkable efficiency in the production of syngas, a mixture of hydrogen and carbon monoxide, owing to their ability to electrolyze steam and carbon dioxide simultaneously. However, the polarization resistance associated with the gas diffusion process in the negatrode (fuel electrode) increases with increasing CO₂ concentrations during steam/CO₂ co-electrolysis. To reduce the gas diffusion resistance in negatrode-supported microtubular SOECs, acrylic resin and graphite are employed as pore formers in the negatrode. Replacing acrylic resin with graphite pore formers enhances the current density from 0.477 to 0.544 A cm⁻² at H₂O/CO₂ = 2 and 700 °C owing to 22 % reduction in the polarization resistance associated with the gas diffusion process at low frequencies below 10 Hz. Focused ion beam-scanning electron microscopy analysis reveals that the fraction of small-pores (less than 2 μm in diameter) is higher in the cell employing the graphite pore former, which helps decrease the polarization resistance associated with the gas diffusion process in the negatrode. Thus, optimizing the negatrode microstructure is crucial to enhancing the performance of co-electrolysis SOECs.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108022"},"PeriodicalIF":4.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144831450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Activity and stability proxies for automated evaluation of IrOx electrocatalysts under variable operating conditions","authors":"Guanqi Huang ,&nbsp;Carlota Bozal-Ginesta ,&nbsp;Alán Aspuru-Guzik","doi":"10.1016/j.elecom.2025.108034","DOIUrl":"10.1016/j.elecom.2025.108034","url":null,"abstract":"<div><div>To accelerate the screening of electrocatalyst materials, it is necessary to enhance the efficiency of their performance evaluation and optimization under dynamic conditions. The activity and stability of electrocatalyst materials are two crucial metrics that are typically correlated, and thus need to be evaluated in parallel. However. assessing both activity and stability in a time-efficient, reliable and comparable manner remains a challenge. Given the rising interest in evaluating electrocatalysts under realistic fluctuating conditions, we propose an electrochemical approach that uses random sampling and Bayesian optimization to explore pulsed amperometry conditions in hydrous iridium oxides for the oxygen evolution reaction. This method provides activity and stability proxies independent of sample loading which are validated against literature data.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108034"},"PeriodicalIF":4.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144858102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tubular electrochemical reactors for the biphasic oxidation of HMF to FDCA","authors":"Tobias Harhues ,&nbsp;Wenzel Plischka ,&nbsp;Matthias Wessling ,&nbsp;Robert Keller","doi":"10.1016/j.elecom.2025.108018","DOIUrl":"10.1016/j.elecom.2025.108018","url":null,"abstract":"<div><div>Tubular reactors offer increased surface-to-volume ratios compared to conventional planar reactors. Yet, they are seldom utilized in electrochemical applications. This is primarily due to the challenges associated with membrane placement and the lack of concepts for cell-stacking and integrating mixer elements in such designs. This study introduces two innovative tubular reactor designs which address these limitations, while the biphasic electrooxidation of hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) serves as case study: the Mixer Electrode Reactor (MER) and the Swiss-roll Reactor (SRR). The MER leverages a tubular 3D-printed stainless steel or nickel foam electrode to enhance mass transfer and active electrode area within the flow cell. The SRR, similar to spiral-wound membrane modules, employs a rolled-up assembly of nickel foam electrodes separated by polymeric spacers. In testing, the MER exhibited low FDCA yields (<span><math><mo>&lt;</mo></math></span>60%) due to an inhomogeneous electric field caused by non-uniform electrode spacing. In contrast, the SRR maintained a uniform electrode distance, resulting in a homogeneous electric field significantly improving performance. The SRR achieved higher FDCA yields (up to 73% at 15 mA cm⁻²) and significantly increased space–time yields (437 mol_FDCA m⁻³ h⁻¹), surpassing both the MER and conventional planar reactor designs. This work highlights the potential of the SRR as an efficient and scalable tubular reactor, particularly for the integrated biphasic oxidation of HMF to FDCA.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108018"},"PeriodicalIF":4.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two-dimensional W2C cathodes for fluoride-ion batteries: Achieving fast ion transport via vacancy induction","authors":"Chuang Wang ,&nbsp;Lidong You ,&nbsp;Tingting Sun ,&nbsp;Zichun Zhang","doi":"10.1016/j.elecom.2025.108007","DOIUrl":"10.1016/j.elecom.2025.108007","url":null,"abstract":"<div><div>The two-dimensional W₂C sparked widespread interest due to high physicochemical stability and large specific surface area. Fluoride-ion batteries (FIBs) are promising candidates in energy storage applications due to excellent properties such as high energy density. Despite such potential, the role of these materials in FIBs needs elucidation, especially regarding the effect of the fluoride ion transport mechanism on the material surface. In this study, the suitability of W₂C as a cathode material for FIB was evaluated for the first time using the vacancy induction method based on first-principles calculations. The results show that the diffusion barrier for fluoride ions on the W₂C surface is drastically reduced from 0.26 eV to 0.11 eV, and the ion transport efficiency is more than doubled, while a high theoretical voltage of 4.32 V and stable cycling at a concentration of 0–175 % F⁻ are achieved. This is attributed to the fact that vacancy defects reduce the binding affinity of tungsten to fluoride ions and promote desorption of fluoride ions. This study highlights the importance of vacancy-induced techniques in enhancing 2D materials' ion transport capacity, providing valuable insights for advancing high-performance FIB designs.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108007"},"PeriodicalIF":4.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144764059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eco-friendly hydrothermal synthesis of Co3O4-based NiO–Fe2O3 binary and ternary nanocomposites for electrochemical energy storage applications","authors":"Khalid Saifullah ,&nbsp;Kamran Ullah ,&nbsp;Najmul Hassan ,&nbsp;Tayyaba Shireen ,&nbsp;Salah Knani ,&nbsp;Vineet Tirth ,&nbsp;Ali Algahtani ,&nbsp;Abid Zaman","doi":"10.1016/j.elecom.2025.108035","DOIUrl":"10.1016/j.elecom.2025.108035","url":null,"abstract":"<div><div>The increasing global demand for advanced energy storage technologies necessitates the development of high-performance materials. In this study, Co₃O₄-based NiO-Fe₂O₃ binary and ternary nanocomposites were synthesized via a green hydrothermal method using banana peel extract as a sustainable reducing agent. The Phase analysis, microstructural, elemental composition, electrochemical, and magnetic properties of synthesized materials were analyzed using X-ray diffractions (XRD), scanning electron microscope (SEM), energy dispersive x-rays (EDX), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), linear sweep voltammetry (LSV), and vibrating sample magnetometry (VSM) technique. XRD analysis confirmed the coexistence of binary (NiO-Co₃O₄) and ternary Fe₂O₃-NiO-Co₃O₄ phases in the nanocomposite. The surface morphology analysis showed the presence of spherical and round-like shape. Electrochemical analysis revealed a high specific capacity of 2692 mAh g⁻¹ for the Fe₂O₃-NiO-Co₃O₄ nanocomposite, significantly surpassing the binary compound. The corresponding energy densities were 391.2, 363.2, 328.2 J/mA.cm⁻², with Tafel slopes of 112, 129, and 118 mV/dec, respectively. The VSM results indicated retentivity values of 1.49, 2.53, and 1.03 emu/g for NiO/Co₃O₄, Fe₂O₃/Co₃O₄, and Fe₂O₃/NiO/Co₃O₄ nanocomposite. The energy dispersive x-rays (EDX) spectroscopy confirmed the presence of Co, O, Fe, and Ni elements. These findings highlight the potential of Co₃O₄-based NiO/Fe₂O₃ nanocomposites as promising candidates for high performance energy and data storage applications.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108035"},"PeriodicalIF":4.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144892265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}