Electrochimica Acta最新文献_第10页

A flexible carbon nanotube//zinc based aqueous zinc ion hybrid micro-supercapacitor with wide voltage window

IF 5.5 3区材料科学

Electrochimica Acta Pub Date : 2025-03-18 DOI: 10.1016/j.electacta.2025.146074

Xingxing Li , Xin Zhou , Guosheng Li , Zilong Wang , Chuankun Zhang , Yuemin Wu , Bo Zhu

引用次数: 0

Elucidating magnesium-air battery anodes with excellent discharge performance by phase modulation with Gd element

IF 5.5 3区材料科学

Electrochimica Acta Pub Date : 2025-03-18 DOI: 10.1016/j.electacta.2025.146072

Jiaxin Bao , Zhoulin Liu , Lianhui Li , Jianchun Sha , Mingliang Qiao , Jie Tian , Yiqiang Yang , Wenhong Liu , Zhiqiang Zhang

{"title":"Elucidating magnesium-air battery anodes with excellent discharge performance by phase modulation with Gd element","authors":"Jiaxin Bao , Zhoulin Liu , Lianhui Li , Jianchun Sha , Mingliang Qiao , Jie Tian , Yiqiang Yang , Wenhong Liu , Zhiqiang Zhang","doi":"10.1016/j.electacta.2025.146072","DOIUrl":"10.1016/j.electacta.2025.146072","url":null,"abstract":"<div><div>Magnesium-air batteries have a promising future as a potential green and clean energy source. The corrosion resistance and discharge performance of Mg-xGd (<em>x</em> = 0, 1, 3, 8, 15, 20 wt.%) alloys as anodes for magnesium-air batteries are systematically investigated. Gd exists in Mg alloys mainly in the form of the Mg<sub>5</sub>Gd phase. The Mg<sub>5</sub>Gd phase acts as the cathodic phase to promote the dissolution of magnesium substrate during corrosion and discharge processes. A higher content of Gd is not favorable to the improvement of corrosion resistance and discharge properties. Whereas, the corrosion resistance was improved over pure Mg with the addition of small amounts of Gd (1 and 3 wt.%). Mg-3Gd gives the best corrosion resistance. At the meantime, it exhibits the lowest amount of hydrogen evolution in the discharge state. The less hydrogen evolution side reaction is also favorable to reduce the accumulation of discharge products, and the flat discharge morphology is also favorable to product exfoliation, leading to the reduction of overpotential generated by discharge products and the increase of voltage. Mg-3Gd reaches a high voltage of 1.568 V at 2.5 mA cm<sup>-2</sup>. The simultaneous attenuation of the hydrogen evolution reaction and the chunk effect gives Mg-3Gd an optimal discharge performance with a discharge efficiency of 60.7% at 40 mA cm<sup>-2</sup> and an energy density of 1681.4 mWh g<sup>-1</sup> at 20 mA cm<sup>-2</sup>, a good candidate for anodes.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"524 ","pages":"Article 146072"},"PeriodicalIF":5.5,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143653915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Insights into structure and properties of catalyst-ionomer interfaces in a PEM fuel cell cathode from atomistic molecular dynamics simulations 通过原子分子动力学模拟深入了解 PEM 燃料电池阴极中催化剂-离子体界面的结构和特性

IF 5.5 3区材料科学

Electrochimica Acta Pub Date : 2025-03-18 DOI: 10.1016/j.electacta.2025.146076

Victor M. Fernández-Alvarez , Kourosh Malek , Michael H. Eikerling , Alan Young , Monica Dutta , Erik Kjeang

{"title":"Insights into structure and properties of catalyst-ionomer interfaces in a PEM fuel cell cathode from atomistic molecular dynamics simulations","authors":"Victor M. Fernández-Alvarez , Kourosh Malek , Michael H. Eikerling , Alan Young , Monica Dutta , Erik Kjeang","doi":"10.1016/j.electacta.2025.146076","DOIUrl":"10.1016/j.electacta.2025.146076","url":null,"abstract":"<div><div>The structure and properties of the catalyst-ionomer interface at the cathode exert a major impact on the performance of polymer electrolyte membrane fuel cells. The interface is affected by both the chemical structure of the ionomer and the potential-dependent changes to the catalyst/support surface during operation. This work presents molecular dynamics simulations of the catalyst-ionomer interface for an expanded Pt/C-ionomer thin film model. Simulations reveal that the structure of the ionomer film is sensitive to the oxidation state of the carbon support, with the preferential ionomer orientation shifting from backbone-towards-carbon to sidechain-towards-carbon oxide. The equivalent weight of the ionomer is shown to determine ionomer packing at the catalyst surface, which could impact the local oxygen transport resistance. The equivalent weight also influences the local proton concentration (or pH) and the proton conductivity at the catalyst-ionomer interface. Shorter sidechain length also increases conductivity by forming larger water clusters that act as channels for hydronium mobility. Overall, the presented simulations demonstrate how the ionomer composition could be tuned to enhance performance via its impact on kinetic, ohmic, and transport losses in fuel cell voltage.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"524 ","pages":"Article 146076"},"PeriodicalIF":5.5,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Early detection of bacteria in the lag phase using the distribution of relaxation times analysis 利用弛豫时间分布分析早期检测滞后期细菌

IF 5.5 3区材料科学

Electrochimica Acta Pub Date : 2025-03-18 DOI: 10.1016/j.electacta.2025.145973

Kyo-Seok Lee , Sun-Mi Lee , Yonghee Bae , Kyung-Hwa Yoo

{"title":"Early detection of bacteria in the lag phase using the distribution of relaxation times analysis","authors":"Kyo-Seok Lee , Sun-Mi Lee , Yonghee Bae , Kyung-Hwa Yoo","doi":"10.1016/j.electacta.2025.145973","DOIUrl":"10.1016/j.electacta.2025.145973","url":null,"abstract":"<div><div>Impedance spectroscopy has been explored for bacterial detection due to its rapid and noninvasive detection. In a bacterial solution, various components, including the culture medium, bacterial cells, and metabolites from bacterial growth, are present, and they exhibit different responses to alternating current electric fields depending on their size and charge. However, conventional impedance spectroscopy for bacterial detection typically considers only overall polarization processes, as isolating individual processes can be challenging. Here, we report on the distribution of relaxation times (DRTs) method, which enables the separation of polarization processes occurring at different time scales. By calculating DRTs from impedance spectra measured during bacterial growth or death, we successfully differentiated between the lag and exponential phases of growth in <em>Escherichia coli, Staphylococcus aureus</em>, and <em>Pseudomonas aeruginosa</em>. This demonstrates its potential for early bacterial detection during the lag phase. In addition, DRT analysis allowed us to distinguish between the mechanisms of action of the antibiotics meropenem and tetracycline.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"524 ","pages":"Article 145973"},"PeriodicalIF":5.5,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced electrokinetic remediation of cadmium contaminated soil by calcium phosphate-modified zeolite as permeable reactive barriers

IF 5.5 3区材料科学

Electrochimica Acta Pub Date : 2025-03-18 DOI: 10.1016/j.electacta.2025.146057

Xi Liu , Chenrui Lan , Zhenhao Yang , Xiaojie Zhuang , Haopeng Feng , Hongbin Wang , Wei Chen , Yangfeng Wu , Jing Tang

{"title":"Enhanced electrokinetic remediation of cadmium contaminated soil by calcium phosphate-modified zeolite as permeable reactive barriers","authors":"Xi Liu , Chenrui Lan , Zhenhao Yang , Xiaojie Zhuang , Haopeng Feng , Hongbin Wang , Wei Chen , Yangfeng Wu , Jing Tang","doi":"10.1016/j.electacta.2025.146057","DOIUrl":"10.1016/j.electacta.2025.146057","url":null,"abstract":"<div><div>Electrokinetic permeable reactive barrier (EK-PRB) is recognized as a prospective technology for the in-situ treatment of heavy metal-contaminated agricultural soils. However, the remediation efficiency is mostly limited by the PRB material. In this study, a calcium phosphate-modified zeolite(Z) adsorption material named Ca<sub>x</sub>(PO<sub>4</sub>)<sub>y</sub>/Z was successfully developed. The morphology and adsorption performance of Cd have been thoroughly explored. The adsorption capacity of Ca<sub>x</sub>(PO<sub>4</sub>)<sub>y</sub>/Z for Cd amounted to 209.97 mg g<sup>−1</sup>, and the fitted adsorption was in agreement with the mechanistic model, suggesting that the adsorption of Ca<sub>x</sub>(PO<sub>4</sub>)<sub>y</sub>/Z on Cd was mainly chemisorption. The fitted adsorption isothermal model showed that the adsorption of Z on cadmium was monolayer adsorption. The synthesized Ca<sub>x</sub>(PO<sub>4</sub>)<sub>y</sub>/Z was used as the adsorption material in EK-PRB to remove cadmium from contaminated agricultural soil. The removal efficiency of Cd is doubled compared to EK, and the energy consumption is reduced by about 147.2 kW·h for 1 g kg<sup>−1</sup> Cd removed. Moreover, the experimental results further confirm its potential for long-term stable application. This work demonstrates the practical feasibility of Ca<sub>x</sub>(PO<sub>4</sub>)<sub>y</sub>/Z as an efficient PRB material in EK-PRB for in-situ remediation of Cd-contaminated soil.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"524 ","pages":"Article 146057"},"PeriodicalIF":5.5,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Silicon-graphite composite anode materials with assembly structure by boron oxide auxiliary for high-performance lithium-ion batteries

IF 5.5 3区材料科学

Electrochimica Acta Pub Date : 2025-03-18 DOI: 10.1016/j.electacta.2025.146075

Yingxiang Fang , Donghao Lu , Jihuan Xie , Hui Guo , Junhang Tian , Xueyi Sun , Deping Wang

{"title":"Silicon-graphite composite anode materials with assembly structure by boron oxide auxiliary for high-performance lithium-ion batteries","authors":"Yingxiang Fang , Donghao Lu , Jihuan Xie , Hui Guo , Junhang Tian , Xueyi Sun , Deping Wang","doi":"10.1016/j.electacta.2025.146075","DOIUrl":"10.1016/j.electacta.2025.146075","url":null,"abstract":"<div><div>The assembly strategy for silicon-graphite composites is usually achieved by constructing weak interactions between silicon and graphite particles through various driving forces, which does not lead to the preparation of silicon-graphite composites with good interfacial compatibility. Inspired by the current application of boron oxide in the interface engineering of anode materials, this study proposes a novel assembly strategy with high efficiency and scalability. Substantial connections were formed at the interface between silicon and graphite by introducing boron oxide auxiliary in combination with high-speed fusion and low-temperature heating. The stability of the silicon-graphite assemblies was further enhanced by coating it with an additional layer of amorphous carbon. The resulting composite anode material exhibited a stable integrated structure. SiG@B<sub>2</sub>O<sub>3</sub>-C anode exhibits good long-term cycling stability with a high reversible capacity of 608 mAh·g<sup>−1</sup> at 0.1 A·g<sup>−1</sup> and a capacity retention of 87.10 % after 200 cycles. The results suggest that the novel assembly strategy using a boron oxide auxiliary is an efficient and promising approach for developing silicon-graphite anode material with stable structures at the silicon-graphite interface.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"525 ","pages":"Article 146075"},"PeriodicalIF":5.5,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advances in the understanding of the electron-donating properties of carbon-based nanomaterials electrogenerated from graphite

IF 5.5 3区材料科学

Electrochimica Acta Pub Date : 2025-03-17 DOI: 10.1016/j.electacta.2025.146071

A.D. Veloso , A.M. Ferraria , R.A. Videira , M.C. Oliveira

{"title":"Advances in the understanding of the electron-donating properties of carbon-based nanomaterials electrogenerated from graphite","authors":"A.D. Veloso , A.M. Ferraria , R.A. Videira , M.C. Oliveira","doi":"10.1016/j.electacta.2025.146071","DOIUrl":"10.1016/j.electacta.2025.146071","url":null,"abstract":"<div><div>In a seminal paper, we demonstrated voltammetrically that carbon nanomaterials electrogenerated from graphite in specific carboxylic acid buffers show electron-donating properties, exhibiting a semiquinone-like state. Unexpectedly, after the terminus of the electrogeneration process, its concentration was found to increase when citrate was used as the synthesis buffer electrolyte. In this paper, we revisit and provide a mechanistic interpretation of this phenomenon.</div><div>Beyond the formation of semiquinone-like species during the galvanostatic synthesis, we present voltammetric and spectroscopic (XPS) evidence for the formation of a non-electroactive superoxide-quinone adduct. It was found that the two entities, semiquinone and superoxide-quinone adduct, can convert into each other in a redox cycle mediated by molecular oxygen, which allowed rationalising the temporal evolution of the voltammetric response.</div><div>It was concluded that the carboxylic acid buffer used in the electrochemical synthesis determines the quinonoid form of the carbon nanomaterial. In tartaric buffer solution, the semiquinone form predominates, whereas, in citrate and malic buffers, the quinone-superoxide adduct and an oxidised quinoid form are the dominant species, respectively. Upon the electrolyte removal, the electro-donating capacity of the nanomaterials is lost, and the nanomaterial is converted into a form with electron-accepting activity.</div><div>Overall, this study highlights the crucial role of the electrolyte in shaping and sustaining the electro-donating properties of hydrophilic carbon nanomaterials in aqueous media.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"525 ","pages":"Article 146071"},"PeriodicalIF":5.5,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of grain size and interface structure of Li-rich cathodes based on various lithium contents 基于不同锂含量的富锂阴极晶粒尺寸和界面结构优化

IF 5.5 3区材料科学

Electrochimica Acta Pub Date : 2025-03-17 DOI: 10.1016/j.electacta.2025.146065

Kailin Liu , Shijie Xu , Qiangfeng Zhang , Haipeng Zhu , Libao Chen , Chunxiao Zhang , Gang Zhou , Weifeng Wei

{"title":"Optimization of grain size and interface structure of Li-rich cathodes based on various lithium contents","authors":"Kailin Liu , Shijie Xu , Qiangfeng Zhang , Haipeng Zhu , Libao Chen , Chunxiao Zhang , Gang Zhou , Weifeng Wei","doi":"10.1016/j.electacta.2025.146065","DOIUrl":"10.1016/j.electacta.2025.146065","url":null,"abstract":"<div><div>Li-rich Mn-based layered oxides (LMLOs) have been considered as the potential cathode materials to develop high-energy density lithium-ion batteries (LIBs) due to the lower cost and higher capacity. Whereas, LMLOs still face challenges of multiphase interfacial side reaction, structure transformation and microcrack growth, especially the polycrystalline particles. Herein, a high-performance submicron single-crystal-like Li-rich Mn-based layered material was obtained by optimizing lithium content to regulate crystal structure and interface chemistry. Detailed characterization indicates that the regulation of lithium content has a profound effect on the grain size, crystal structure and crystallinity. And the submicron LMLOs with appropriate lithium content exhibit a composite crystal structure composed of long-range ordered layered bulk phase and spinel heterogeneous surface layer, which combines the advantages of structural stability in single-crystal particles and rapid kinetic behavior in polycrystalline particles. Hence, the optimized submicron single-crystal-like LMLOs possess remarkable reversible capacity of 257.7 mAh/g and 143.2 mAh/g at 0.1 C and 10 C, respectively, corresponding to the capacity retention of 85.72% and voltage decay of 1.77 mV/cycle after 200 cycles at 1 C, which provides a new insight for the optimization and development of cathodes for rechargeable secondary battery.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"525 ","pages":"Article 146065"},"PeriodicalIF":5.5,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chloride sensing using optical probe

IF 5.5 3区材料科学

Electrochimica Acta Pub Date : 2025-03-17 DOI: 10.1016/j.electacta.2025.146064

Summer Dalgamouni, Driss Benhaddou, Stanko R. Brankovic

引用次数: 0

Explaining the mechanism of formic acid oxidation on single crystal Pd sites by platinum-palladium alloy single-crystal surfaces

IF 5.5 3区材料科学

Electrochimica Acta Pub Date : 2025-03-17 DOI: 10.1016/j.electacta.2025.146068

Gabriel Melle, Juan M. Feliu, Rosa M. Arán-Ais, Enrique Herrero

{"title":"Explaining the mechanism of formic acid oxidation on single crystal Pd sites by platinum-palladium alloy single-crystal surfaces","authors":"Gabriel Melle, Juan M. Feliu, Rosa M. Arán-Ais, Enrique Herrero","doi":"10.1016/j.electacta.2025.146068","DOIUrl":"10.1016/j.electacta.2025.146068","url":null,"abstract":"<div><div>The oxidation of formic acid (FAOR) is a critical reaction for direct formic acid fuel cells (DFAFCs), offering high theoretical efficiency and potential for sustainable energy conversion. This study investigates the FAOR mechanism on well-defined Pt-Pd alloy single-crystal surfaces, focusing on the role of Pd incorporation in modifying the electrocatalytic behavior of Pt(111) and Pt(100) electrodes. Through cyclic voltammetry, high-scan-rate voltammetry, and chronoamperometric analysis, the effect of Pd in the reaction mechanism is explored. Results reveal that Pd incorporation significantly alters the adsorption behavior, reaction kinetics, and poisoning rates by shifting onset potentials, increasing current densities, and reducing CO formation rates at low potentials. On (111) surfaces, the presence of Pd enhances the direct oxidation pathway, while on (100) surfaces, it significantly reduces the indirect CO-mediated pathway, while accelerating the reaction through the active path, leading to improved catalytic performance. Furthermore, formate adsorption and its role in the oxidation mechanism are discussed, with implications for the reaction efficiency at various Pd compositions.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"524 ","pages":"Article 146068"},"PeriodicalIF":5.5,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0