Electrochemistry Communications最新文献

{"title":"Cycling stability of lithium-ion batteries with pressure-treated NCM811 cathodes","authors":"Yusuke Abe,&nbsp;Yuki Kumagai,&nbsp;Mahmudul Kabir,&nbsp;Seiji Kumagai","doi":"10.1016/j.elecom.2025.108002","DOIUrl":"10.1016/j.elecom.2025.108002","url":null,"abstract":"<div><div>This study developed an effective approach for improving the cycling performance of NCM811-based lithium-ion batteries (LIBs) at a charge rate of 5C. The charge–discharge performance of LIBs with pressure-treated NCM811 cathodes was investigated. The cathode coating, comprising NCM811, acetylene black, and polyvinylidene fluoride, was compressed at pressures of 10–40 MPa. Galvanostatic charge–discharge tests revealed that a treatment pressure of 40 MPa improved the storage performance at ≥5C under the LIB full-cell configuration. After pressure treatment, NCM811-based LIBs exhibited excellent cycling stability over 500 charge–discharge cycles at 5C. After 500 cycles, energy-dispersive X-ray analysis confirmed that the dissolution of transition metals from the NCM811 cathode and their deposition at the graphite anode were inhibited. High-pressure treatment modified the morphology of the NCM811 cathodes, resulting in favorable electrochemical properties. The proposed NCM811 electrodes are promising for the development of power-type LIBs with high energy densities and long cycle lifetimes.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"178 ","pages":"Article 108002"},"PeriodicalIF":4.7,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696676","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":"2025-07-15","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":"Urea electrooxidation coupled with energy-saving H2 production using bimetallic sulfide heterojunctions","authors":"Suzhen Bai ,&nbsp;Kesheng Cao ,&nbsp;Yi Zeng ,&nbsp;Zhengshan Tian ,&nbsp;Xiangxiang Du ,&nbsp;Xingqun Zheng","doi":"10.1016/j.elecom.2025.107999","DOIUrl":"10.1016/j.elecom.2025.107999","url":null,"abstract":"<div><div>The theoretical electrocatalytic potential for the urea oxidation reaction (UOR) is notably low at 0.37 V, positioning it as a promising alternative to hydrogen evolution reaction for traditional water electrolysis. In this study, we synthesized Ni_xS₆/MnS (NMS) heterojunction catalysts using a straightforward co-precipitation method. Initially, we prepared bimetallic hydroxides precursors (Ni/Mn(OH)₂), which were subsequently sulfurized to obtain the NMS heterojunctions. The formation of NMS heterojunctions could enhance charge transfer and improve electrical conductivity, significantly boosting the electrocatalytic UOR activity. The NMS heterojunctions facilitate electrocatalytic UOR at a low anodic potential of 0.7 V vs. Ag/AgCl, achieving a peak current density of 11.8 mA cm⁻², with effective electrochemical surface area and Tafel slope values of 6.23 mF cm⁻² and 78.3 mV dec⁻¹, respectively. Furthermore, when utilized as an anode for overall urea electrolysis within a dual-electrode system, the NMS heterojunctions obtained a higher current density of 13.2 mA cm⁻², double that of pure water electrolysis (6.1 mA cm⁻²). This work represents a significant advancement in employing nickel-based sulfide heterojunctions for catalyzing urea oxidation reaction.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"178 ","pages":"Article 107999"},"PeriodicalIF":4.7,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144663595","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":"A review article on: Voltammetric detection of lead, mercury, chromium, and arsenic metal ions from environmental samples","authors":"Andualem Ejigu ,&nbsp;Molla Tefera ,&nbsp;Atnafu Guadie","doi":"10.1016/j.elecom.2025.107996","DOIUrl":"10.1016/j.elecom.2025.107996","url":null,"abstract":"<div><div>Detecting hazardous heavy metals like lead, cadmium, mercury, and arsenic is a significant global issue because of their high toxicity and environmental durability. While traditional laboratory methods provide accurate results, their high cost, complexity, and slow processing times restrict their practicality for widespread, on-site monitoring. In this regard, electrochemical techniques, especially voltammetry, have become a strong alternative, delivering a great mix of high sensitivity, portability, and affordability.</div><div>This review highlights recent advancements in innovative electrode materials, such as graphene-modified electrodes and sensors enhanced with metal nanoparticles, along with advanced stripping techniques like anodic stripping voltammetry (ASV) and square wave voltammetry (SWV). Thanks to these advancements, detection limits have improved significantly, often reaching the parts per billion (ppb) range, while the selectivity for specific metal ions has also been enhanced.</div><div>Additionally, the review critically examines methods for analyzing water, soil, and sediment samples, showcasing the promising capabilities of nanocomposite materials that greatly increase sensitivity and stability. It also emphasizes the importance of standardized protocols for reliable comparisons and discusses future research directions, including the development of new nanocomposite materials and the integration of these advanced ‘nanosensors’ into portable devices for real-time environmental monitoring.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"178 ","pages":"Article 107996"},"PeriodicalIF":4.7,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653704","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":"MOF-clad FeTiO3: Synergistic suppression of material decomposition and capacity fading in lithium-ion battery anodes","authors":"Zhipeng Yuan,&nbsp;Xiaohuan Wang,&nbsp;Congjie Yang,&nbsp;Xinba Yaer","doi":"10.1016/j.elecom.2025.107998","DOIUrl":"10.1016/j.elecom.2025.107998","url":null,"abstract":"<div><div>Titanium iron oxide (FeTiO₃) has emerged as a promising anode material for lithium-ion batteries due to its distinctive octahedral structure, natural abundance, and high theoretical specific capacity. However, practical implementation has been hindered by significant capacity fading during cycling and structural instability under high current densities. In this study, we developed an innovative solution impregnation strategy to construct a metal-organic framework (MIL-100) protective layer on FeTiO₃ particles (denoted as FeTiO₃-MOF). This engineered architecture effectively addresses two critical challenges: (1) suppressing active material dissolution and electrode pulverization through physical confinement, and (2) enhancing charge transfer kinetics via the formation of continuous conductive pathways. The optimized FeTiO₃-MOF composite demonstrates remarkable electrochemical performance, delivering a high reversible capacity of 1077.5 mAh g⁻¹ after 150 cycles at 0.1 A g⁻¹ and maintaining 222 mAh g⁻¹ after 1000 cycles at 1 A g⁻¹ - quadruple the capacity of pristine FeTiO₃ (59 mAh g⁻¹) under identical conditions. Systematic electrochemical analysis reveals significantly improved charge transfer characteristics and lithium-ion diffusion coefficients, effectively mitigating the rapid capacity decay typically observed at elevated current densities. More importantly, this work establishes a novel self-replenishment mechanism through the rational utilization of metal ions within the MOF matrix, which dynamically compensates for active material loss during prolonged cycling. The proposed surface engineering strategy provides an effective method for developing next-generation energy storage materials that combine high capacity with exceptional cycling stability.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"178 ","pages":"Article 107998"},"PeriodicalIF":4.7,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653706","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":"Process compatibility analysis for hybrid electrochemical removal and accretion towards a multifunctional machine-tool: An application-oriented approach","authors":"Muhammad Hazak Arshad ,&nbsp;Anton Peeters ,&nbsp;Xiaolei Chen ,&nbsp;Dominiek Reynaerts ,&nbsp;Krishna Kumar Saxena","doi":"10.1016/j.elecom.2025.107997","DOIUrl":"10.1016/j.elecom.2025.107997","url":null,"abstract":"<div><div>The demand for multifunctional and multi-material parts has driven the development of hybrid manufacturing technologies. Laser-based additive and subtractive techniques offer design flexibility but are unsuitable for smart components, high-end aerospace and biomedical applications due to thermal defects. In contrast, electrochemical additive manufacturing (ECAM) and electrochemical machining (ECM) are non-contact in nature with minimal thermal load, which can preserve material properties while enabling material accretion and removal, respectively as governed by the Faraday's laws of electrolysis. However, sequential processing with ECM and ECAM is challenging to achieve on the same platform due to different compatible process windows, electrolytes, and localisation issues.</div><div>Therefore, this study presents successful hybridisation of maskless ECM and ECAM processes on a multifunctional machine-tool, enabling bi-directional feature fabrication (via ECAM) and shaping (via ECM) in one clamp, where the process localisation is achieved by an electrolyte confining air-column. The experiments examined the influence of process parameters and investigated process compatibility to demonstrate the potential of this hybrid technique. The air column at 1.1 bar improved process localisation by reducing the ECAM feature width by 60 % in comparison to no air-confinement (0 bar). Additionally, the best surface quality of ∼0.33 μm Sa with ECAM at 5 V was achieved at 50 % duty cycle with 20 μs pulse period as voltage pulsing allowed flushing of by-products from the interelectrode gap and shorter pulses reduced gas bubbles generation. Furthermore, it was possible to demonstrate layered manufacturing and mould repair applications using appropriate process parameters to avoid stray removal and accretion during bi-directional ECM and ECAM. These results represent a significant step in hybrid electrochemical manufacturing towards realising advanced multi-material and multi-functional component applications.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"178 ","pages":"Article 107997"},"PeriodicalIF":4.7,"publicationDate":"2025-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144633795","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":"Oxalate-assisted synthesis of MnCo2O4 nanoparticles on layered MXene (Ti3C2Tx) for supercapacitor application","authors":"S. Emami,&nbsp;M. Hasheminiasari,&nbsp;S.M. Masoudpanah,&nbsp;R. Omrani,&nbsp;S.P. Ghaemi","doi":"10.1016/j.elecom.2025.107995","DOIUrl":"10.1016/j.elecom.2025.107995","url":null,"abstract":"<div><div>The synthesis of MnCo₂O₄/Ti₃C₂Tx composite powders was achieved through a hydrothermal method facilitated by oxalate assistance. To assess the influence of MXene levels (0, 25, and 50 wt%) on microstructure, structure, and electrochemical performance, modern characterization methods were applied in this study. The mixed manganese‑cobalt oxalates were precipitated on the layered MXene by adding a proper amount of oxalic acid to the Nitride solution. The MnCo₂O₄ nanoparticles were then crystallized by heat treatment at 450 °C for one hour in a nitrogen gas atmosphere. The pristine MnCo₂O₄ had a columnar-like morphology, which was transformed into a fine particulate microstructure by combining with MXene. These pristine MnCo₂O₄ powders indicated a higher specific capacitance of 1116 F g⁻¹, significantly exceeding the 640.5 Fg⁻¹ recorded for the pristine layered MXene. The Incorporation of 25 wt% layered MXene enhanced the specific capacitance to a remarkable 1500 Fg⁻¹, attributed to its finer microstructure. Under a current rate of 1 Ag⁻¹, the capacitor composed of MnCo₂O₄-25 wt% MXene//activated carbon achieved an energy density of 43.5 Wh kg⁻¹ at a power density of 1411 W kg⁻¹.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"178 ","pages":"Article 107995"},"PeriodicalIF":4.7,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144588275","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":"Developing PI@PANI composites for aqueous zinc-ion batteries","authors":"Ya Zhao ,&nbsp;Lintao Wu ,&nbsp;Hexiang Zhong ,&nbsp;Lin Li ,&nbsp;Jiaxin Fan","doi":"10.1016/j.elecom.2025.107994","DOIUrl":"10.1016/j.elecom.2025.107994","url":null,"abstract":"<div><div>Polyimide electrode materials exhibit good electrochemical performance; however, their low conductivity limits their application. To address this issue, this study synthesized polyaniline-polyimide (PI@PANI) composites through chemical oxidative polymerization and solvothermal methods. The effects of the polyaniline ratio on the morphology, specific surface area, molecular weight, and electrochemical performance of the composites were investigated. The PI@PANI maintained its characteristic morphology, and when the polyaniline ratio was higher, the specific surface area of the composites increased along with the increase of high molecular weight polymers, while thermal stability slightly decreased. As an electrode material in zinc half-cells, Zn//PI@PANI (PI@PANI-2, NTCDA: ANI = 1:1) showed good cycling performance and rate capability. At a current density of 250 mA/g, after 400 cycles, the capacity retention reached as high as 90 %. Additionally, during full cell tests, the PI@PANI// MnO₂ full cell maintained a high capacity retention of 86 % after 500 cycles at a current density of 200 mA/g. These results indicate that the PI@PANI composites have significant application potential in the field of electrochemical energy storage, providing theoretical guidance and experimental evidence for further optimizing the composition and structure of the composites to enhance their electrochemical performance.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"178 ","pages":"Article 107994"},"PeriodicalIF":4.7,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144595510","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":"Effect of solvent type on solution synthesis of Na3V2(PO4)3/C cathode material for Na storage","authors":"R. Talei,&nbsp;S.M. Masoudpanah,&nbsp;M. Hasheminiasari,&nbsp;H. Nasrinpour","doi":"10.1016/j.elecom.2025.107992","DOIUrl":"10.1016/j.elecom.2025.107992","url":null,"abstract":"<div><div>Na₃V₂(PO₄)₃/C powders were prepared using a solution technique with cetyltrimethylammonium bromide (CTAB) in various solvents, including ethanol, methanol, and glycerol. The impact of the solvent choice on the structural, microstructural, and electrochemical properties was elucidated by X-ray diffractometry, Raman spectroscopy, electron microscopy, galvanostatic charge-discharge, and electrochemical impedance spectroscopy methods. Single-phase Na₃V₂(PO₄)₃ (NVP) powders were achieved by calcining at 850 °C for 6 h, irrespective of the solvent type. Decomposition of the CTAB agent resulted in a carbon layer over the nearly spherical NVP particles. The methanol solvent revealed a finer particle size, leading to superior electrochemical performance, such as a capacity retention of 82 % after 50 cycles at a 1C current rate and a rate capability of 71.63 % when increasing the current rate from 0.1C to 1C. The superior quality carbon layer on the NVP particles, achieved by the methanol solvent, played a key role in the enhanced electrochemical performance.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"178 ","pages":"Article 107992"},"PeriodicalIF":4.7,"publicationDate":"2025-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144534282","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":"Unsupported and carbon-supported silver catalysts for oxygen reduction reaction in alkaline media","authors":"Jonas Mart Linge ,&nbsp;Xiang Lyu ,&nbsp;Heiki Erikson ,&nbsp;Lynda Amichi ,&nbsp;David A. Cullen ,&nbsp;Kaido Tammeveski ,&nbsp;Alexey Serov","doi":"10.1016/j.elecom.2025.107991","DOIUrl":"10.1016/j.elecom.2025.107991","url":null,"abstract":"<div><div>Quick and easy Ag catalysts preparation via wet chemical synthesis method using only reducing agent (pure-Ag); reducing agent and citric acid as the capping agent (Ag-CA); and carbon support (KetjenBlack 600J), capping agent, and the reducing agent (Ag/C) is demonstrated. The Ag-based electrocatalysts are characterized by high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) with energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis, and X-ray photoelectron spectroscopy (XPS). The electrocatalytic activity of Ag catalysts for O₂ reduction reaction (ORR) in 1 M KOH is evaluated using the rotating (ring)-disc electrode method. SEM and HAADF-STEM results show that the unsupported pure-Ag and Ag-CA catalysts consist mainly of big agglomerates, and Ag/C has the smallest agglomerates and some sub-3 nm Ag nanoparticles. The XPS results reveal that Ag in all the catalysts is in the metallic form (Ag⁰). Despite consisting of big agglomerates, the Ag-CA catalyst exhibits similar ORR electrocatalytic activity to that of Ag/C. Ag-CA (unsupported) shows the lowest hydrogen peroxide yield. These results are of great importance for the development of Ag-based catalysts that can be prepared in a fast, simple and easily up scalable fashion, for anion exchange membrane fuel cells.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"178 ","pages":"Article 107991"},"PeriodicalIF":4.7,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549800","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}