Electrochimica Acta最新文献

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Development and optimization of a biochar-based/Ni-Mo catalyst as efficient cathode electrode to produce hydrogen by alkaline electrolysis 生物炭基/Ni-Mo催化剂作为碱性电解制氢高效阴极电极的研制与优化
IF 5.6 3区 材料科学
Electrochimica Acta Pub Date : 2026-05-01 Epub Date: 2026-02-06 DOI: 10.1016/j.electacta.2026.148401
Hillary Henao-Toro , Santiago Cartagena , Jorge A. Calderón , Edwin Chica , Ainhoa Rubio-Clemente
{"title":"Development and optimization of a biochar-based/Ni-Mo catalyst as efficient cathode electrode to produce hydrogen by alkaline electrolysis","authors":"Hillary Henao-Toro ,&nbsp;Santiago Cartagena ,&nbsp;Jorge A. Calderón ,&nbsp;Edwin Chica ,&nbsp;Ainhoa Rubio-Clemente","doi":"10.1016/j.electacta.2026.148401","DOIUrl":"10.1016/j.electacta.2026.148401","url":null,"abstract":"<div><div>This study presents the development and optimization of a catalytic ink using biochar (BC) as a cathodic electrode material for green hydrogen production through the hydrogen evolution reaction (HER). BC, derived from biomass conversion residues, was utilized as a porous support for transition metal catalysts, specifically nickel and molybdenum. The resulting Ni-BCNiMo composite demonstrated enhancement of the electrocatalytic performance for HER, achieving an overpotential of -95 mV at a current density of −10 mA cm⁻² and a Tafel slope of −125 mV dec⁻¹. The chronopotentiometry confirms stability over a period of 24 h at a current density of −400 mA cm<sup>−2</sup>, which indicates efficient HER kinetics. A central composite design was applied to optimize the ink formulation and the experimental conditions, yielding a high correlation with experimental data (adjusted R² = 89 %). These findings suggest that BC, when properly engineered, can serve as a cost-effective, high-performance alternative to conventional carbon materials, supporting the development of scalable, and sustainable technologies for green hydrogen generation.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"557 ","pages":"Article 148401"},"PeriodicalIF":5.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135088","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
Controllable synthesis of grape-shaped manganese tetroxide and its sensitive detection of nitrite in food and water analyses 葡萄状四氧化二锰的可控合成及其对食品和水中亚硝酸盐的灵敏检测分析
IF 5.6 3区 材料科学
Electrochimica Acta Pub Date : 2026-05-01 Epub Date: 2026-02-10 DOI: 10.1016/j.electacta.2026.148430
Zhenyu Cheng, Youfei Sun, Yajie Liu, Xinyi Huang, Rongze Zhou, Zhijun Li, Xiaoxia Wei, Haiyan Song
{"title":"Controllable synthesis of grape-shaped manganese tetroxide and its sensitive detection of nitrite in food and water analyses","authors":"Zhenyu Cheng,&nbsp;Youfei Sun,&nbsp;Yajie Liu,&nbsp;Xinyi Huang,&nbsp;Rongze Zhou,&nbsp;Zhijun Li,&nbsp;Xiaoxia Wei,&nbsp;Haiyan Song","doi":"10.1016/j.electacta.2026.148430","DOIUrl":"10.1016/j.electacta.2026.148430","url":null,"abstract":"<div><div>A unique three-dimensional grape-shaped manganese tetroxide (gs-Mn<sub>3</sub>O<sub>4</sub>) nanomaterial was synthesized using a simple one-pot hydrothermal method. The microstructure and physicochemical properties of Mn<sub>3</sub>O<sub>4</sub> varied depending on the solvent type, synthesis temperature, and reaction time. Results indicated that the resulting gs-Mn<sub>3</sub>O<sub>4</sub> exhibited excellent catalytic activity toward nitrite ions (NO₂⁻) when the volume ratio of ethylene glycol to purified water was 1:7, the reaction duration was 6 h and the reaction temperature was 120 °C. The electrochemical sensor fabricated with such material demonstrated a wide linear detection range of 0.2 - 1.18 × 10<sup>3</sup> μmol·L<sup>-1</sup> for NO₂⁻, with a corresponding detection limit of 0.067 μmol·L<sup>-1</sup> and a sensitivity of 0.33 µA·(μmol·L<sup>-1</sup>)<sup>-1</sup>·cm<sup>-2</sup>. Moreover, the sensor is capable of effectively identifying trace levels of NO₂⁻ in tap water, pickled vegetables, and ham sausage, offering both a perspective and an approach toward developing more sensitive electrochemical sensors for nitrite.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"557 ","pages":"Article 148430"},"PeriodicalIF":5.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146153137","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
A coherent eutectic high-entropy alloy with exceptional corrosion resistance 一种具有优异耐腐蚀性的共晶高熵合金
IF 5.6 3区 材料科学
Electrochimica Acta Pub Date : 2026-05-01 Epub Date: 2026-02-14 DOI: 10.1016/j.electacta.2026.148456
Jiayi Zhu , Hongwei Yao , Jibin Pu , Xuezhi Qin , Yudong An , Kai Xu , Quan Shan
{"title":"A coherent eutectic high-entropy alloy with exceptional corrosion resistance","authors":"Jiayi Zhu ,&nbsp;Hongwei Yao ,&nbsp;Jibin Pu ,&nbsp;Xuezhi Qin ,&nbsp;Yudong An ,&nbsp;Kai Xu ,&nbsp;Quan Shan","doi":"10.1016/j.electacta.2026.148456","DOIUrl":"10.1016/j.electacta.2026.148456","url":null,"abstract":"<div><div>Eutectic high-entropy alloys (EHEAs), as promising marine structural materials, are prone to localized corrosion caused by galvanic differences between their constituent phases. This study investigates the relationship between phase composition, microstructure, and corrosion resistance in AlCo<sub>1-x</sub>Cr<sub>1+x</sub>FeNi<sub>2.1</sub> (<em>x</em> = 0, 0.6, 0.8, 1.0) high-entropy alloys (HEAs), focusing on the stability of their passive films. The HEAs were designed via CALPHAD and prepared by vacuum arc melting. Results show that the AlCo<sub>0.2</sub>Cr<sub>1.8</sub>FeNi<sub>2.1</sub> EHEA exhibits a coherent eutectic microstructure, comprising a composite of a disordered, Cr-rich BCC matrix and ordered B2 precipitates, which together form a nanoscale network. This alloy demonstrates significantly improved corrosion resistance in 3.5 wt.% NaCl solution, with the passive current density reaching 1.76 ± 0.28 µA/cm<sup>2</sup>. The superior corrosion resistance is attributed to two factors: the formation of a stable ∼2.210 nm passive film and a unique nanoscale network structure. This structure modulates microelectrochemical behavior by maintaining an average anodic site spacing of ∼100 nm and a minimal local potential difference of 27 mV, thereby effectively suppressing the initiation and propagation of localized corrosion. This finding presents a novel microstructural design strategy for mitigating galvanic corrosion in EHEAs through the construction of a nanoscale network that modulates its intrinsic micro-electrochemical properties.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"557 ","pages":"Article 148456"},"PeriodicalIF":5.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146184568","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
Tailoring tin electrodeposits in deep eutectic solvents. Electrodeposition on glassy carbon and copper electrodes in oxaline 在深共晶溶剂中裁剪锡电沉积。在草碱中沉积玻碳和铜电极
IF 5.6 3区 材料科学
Electrochimica Acta Pub Date : 2026-05-01 Epub Date: 2026-02-23 DOI: 10.1016/j.electacta.2026.148520
S. Tsunoda , L.A. Azpeitia , M.J. Rodríguez Presa , C.A. Gervasi , A.E. Bolzán
{"title":"Tailoring tin electrodeposits in deep eutectic solvents. Electrodeposition on glassy carbon and copper electrodes in oxaline","authors":"S. Tsunoda ,&nbsp;L.A. Azpeitia ,&nbsp;M.J. Rodríguez Presa ,&nbsp;C.A. Gervasi ,&nbsp;A.E. Bolzán","doi":"10.1016/j.electacta.2026.148520","DOIUrl":"10.1016/j.electacta.2026.148520","url":null,"abstract":"<div><div>The formation of Sn films in acid media using a deep eutectic solvent was studied. For this purpose, a mixture of choline chloride and oxalic acid was used and glassy carbon and polycrystalline copper electrodes employed. From voltammetric and chronoamperometric runs the electrodeposition process was characterized as diffusion-controlled with a <span><math><mi>D</mi></math></span>(Sn(II)) = <span><math><mrow><mn>6</mn><mo>.</mo><mn>04</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>7</mn></mrow></msup></mrow></math></span> cm<span><math><msup><mrow></mrow><mrow><mn>2</mn></mrow></msup></math></span> s<span><math><msup><mrow></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></math></span>, being the initial stage an instantaneous nucleation followed by a 3D growth. Depending on the substrate, the electrodeposition process occurs under overpotential (GC) or underpotential + overpotential (Cu) conditions. Different morphologies are obtained depending on the nature of the substrate and the potentiostatic and galvanostatic routines applied. Images from constant potential electrodeposition show the formation of well-dispersed tetrahedral pyramidal crystals on the GC surface and faceted particles with two preferred sizes on Cu. At high overpotentials, letter-shaped crystals form on GC, and fairly compact films are produced on Cu. Galvanostatic square wave routines allow to obtain different morphologies and size distributions of Sn deposits, depending on the current density, the on/off time ratio and the perturbation application time. Well dispersed nanometric to complex tetrahedral micrometric particles are formed on GC electrodes. On the other hand, the diffusion of Sn atoms into the Cu lattice precludes the formation of low density nanometric particles. In this case low density deposits of micrometric particles and compact films consisting of particles of few hundreds of nanometres in size can be obtained depending on the characteristics of the galvanostatic routine.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"557 ","pages":"Article 148520"},"PeriodicalIF":5.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147279657","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
Synergistic theoretical and experimental investigation of NiFe2O4-polypyrrole composite for energy storage application nife2o4 -聚吡咯复合储能材料的协同理论与实验研究
IF 5.6 3区 材料科学
Electrochimica Acta Pub Date : 2026-05-01 Epub Date: 2026-02-12 DOI: 10.1016/j.electacta.2026.148445
Ajay Kumar , Prashant Kumar , Sandeep K. Soni , Mohan L. Verma , Gagan Dixit
{"title":"Synergistic theoretical and experimental investigation of NiFe2O4-polypyrrole composite for energy storage application","authors":"Ajay Kumar ,&nbsp;Prashant Kumar ,&nbsp;Sandeep K. Soni ,&nbsp;Mohan L. Verma ,&nbsp;Gagan Dixit","doi":"10.1016/j.electacta.2026.148445","DOIUrl":"10.1016/j.electacta.2026.148445","url":null,"abstract":"<div><div>In this study, nickel ferrite/polypyrrole composites were synthesized through <em>in-situ</em> oxidative polymerization to analyze their applicability as an electrode material for supercapacitors. The structural, morphological, and electrochemical properties of the synthesized material have been thoroughly investigated. The electrochemical characterizations have shown that the N5PY5 (50–50 wt%) composite of nickel ferrite and polypyrrole has a specific capacitance of 503.3 F/g at 2 A/g in 6 M KOH, which is three times higher than pure nickel ferrite. The value of solution resistance and charge transfer resistance is also reduced for the composite in comparison to pure nickel ferrite. The enhanced electrochemical performance of the composite electrode was explained on the basis of the synergistic effect between the polypyrrole and nickel ferrite. Polypyrrole acts as a conductive support, provides additional active sites, and improves redox activity and diffusion in the composite electrode. Theoretical analysis using DFT calculation was also employed to analyze the interaction mechanism between the polypyrrole and nickel ferrite. The high adsorption energy (-2.6 eV) and covalent bonding between oxygen and carbon indicated a strong interaction between the nickel ferrite and pyrrole’s dimer. Consequently, the composite electrode shows improved stability (88.6 %) as compared to polypyrrole (38.6 %) after 1000 cycles of charging and discharging.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"557 ","pages":"Article 148445"},"PeriodicalIF":5.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146184569","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
Highly sensitive electrochemical immunosensor for the detection of Beta-2-microglobulin based on ternary composite polyaniline/poly-L-cysteine/molybdenum disulfide 基于三元复合聚苯胺/聚l -半胱氨酸/二硫化钼的高灵敏度电化学免疫传感器检测β -2微球蛋白
IF 5.6 3区 材料科学
Electrochimica Acta Pub Date : 2026-05-01 Epub Date: 2026-02-17 DOI: 10.1016/j.electacta.2026.148460
Zhen-Fu Lin , Yu-Qi Ge , Yu-Zhu Zhao , Mei-Na Chen , Hao Li , Nai-Cui Liu , Zhencheng Chen , Guo-Cheng Han , Xiao-Zhen Feng , Heinz-Bernhard Kraatz
{"title":"Highly sensitive electrochemical immunosensor for the detection of Beta-2-microglobulin based on ternary composite polyaniline/poly-L-cysteine/molybdenum disulfide","authors":"Zhen-Fu Lin ,&nbsp;Yu-Qi Ge ,&nbsp;Yu-Zhu Zhao ,&nbsp;Mei-Na Chen ,&nbsp;Hao Li ,&nbsp;Nai-Cui Liu ,&nbsp;Zhencheng Chen ,&nbsp;Guo-Cheng Han ,&nbsp;Xiao-Zhen Feng ,&nbsp;Heinz-Bernhard Kraatz","doi":"10.1016/j.electacta.2026.148460","DOIUrl":"10.1016/j.electacta.2026.148460","url":null,"abstract":"<div><div>Beta-2-Microglobulin (β2M) is a critical biomarker for diseases such as kidney disorders and cancer. However, electrochemical detection methods for β2M remain scarce. Therefore, a novel electrochemical immunosensor for the ultrasensitive detection of β2M was developed in this study. It is based on a ternary composite of polyaniline (PANI), poly-<span>l</span>-cysteine (PL-Cys), and molybdenum disulfide (MoS₂) functionalized onto screen-printed carbon electrodes (SPCE). Through the specific recognition between Beta2-microglobulin antibody (anti-β2M) and its target antigen, and utilizing bovine serum albumin (BSA) to block non-specific binding sites, a BSA/anti-β2M/PANI/PL-Cys/MoS₂/SPCE immunosensor was constructed. Experimental results demonstrate that the sensor exhibits excellent linearity within the 0.001–500 ng/mL (R²=0.9924), with a detection limit as low as 0.33 pg/mL. It shows outstanding selectivity (RSD=2.69%), repeatability (RSD=0.74%), and long-term stability (30-day RSD=2.64%). Recovery rates in serum samples range from 100.40% to 103.76%, confirming its reliability in complex biological matrices. The sensor combines the signal amplification effect of the conductive substrate (PANI/L-Cys/MoS₂) with the impedance effect of the insulating biological layer (antibody-antigen complex), utilizing the quantitative relationship between target analyte concentration and signal attenuation to achieve detection. This approach provides an efficient and low-cost new strategy for on-site rapid screening.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"557 ","pages":"Article 148460"},"PeriodicalIF":5.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146209418","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
Electrochromic behavior of dimethyl terephthalate in ionic liquids-based quasi-solid matrices 离子液体基准固体基质中对苯二甲酸二甲酯的电致变色行为
IF 5.6 3区 材料科学
Electrochimica Acta Pub Date : 2026-05-01 Epub Date: 2026-02-18 DOI: 10.1016/j.electacta.2026.148464
Tehreema Naeem, Neus Vilà, Jordi Hernando, Gonzalo Guirado
{"title":"Electrochromic behavior of dimethyl terephthalate in ionic liquids-based quasi-solid matrices","authors":"Tehreema Naeem,&nbsp;Neus Vilà,&nbsp;Jordi Hernando,&nbsp;Gonzalo Guirado","doi":"10.1016/j.electacta.2026.148464","DOIUrl":"10.1016/j.electacta.2026.148464","url":null,"abstract":"<div><div>This study reports a solid-state electrochromic device (ECD) based on dimethylterephthalate (DMT), demonstrating high stability and low operating voltage on both rigid and flexible substrates. DMT molecules were incorporated into a poly(vinylidene fluoride-<em>co</em>-hexafluoropropylene) ionogel (IG) using ionic liquids as environmentally friendly electrolytes. Cyclic voltammetry and in-situ spectroelectrochemistry were employed to investigate the electrochromic mechanism in the DMT@IG system. An ECD with two electrodes was fabricated on ITO-coated glass, operating at a low potential difference of 2 V, with bleaching times of 2.06 s, coloration times of 5.92 s, an optical contrast of 21%, and a color efficiency of 147.7 cm² C⁻¹. The device maintained stability for up to 30 cycles. Furthermore, a flexible three-electrode configuration with a DMT@IG membrane was designed, confirming DMT's potential as an advantageous material for low-voltage electrochromic and flexible display applications.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"557 ","pages":"Article 148464"},"PeriodicalIF":5.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146223423","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
Synergistic modification and advanced processing: high-performance Na2+2xFe2-x(SO4)3 cathodes enabled by spray-drying and CNTs/Mg2+ co-strategy 协同改性和高级加工:通过喷雾干燥和CNTs/Mg2+协同策略实现高性能Na2+2xFe2-x(SO4)3阴极
IF 5.6 3区 材料科学
Electrochimica Acta Pub Date : 2026-05-01 Epub Date: 2026-02-21 DOI: 10.1016/j.electacta.2026.148511
Lei Ming , Xizhao Wang , Lang Zhao , Xuan Long , Yun Yu , Xinyou He , Xiangdong Zhu , Zhen Yao , Wei Xu , Xing Ou
{"title":"Synergistic modification and advanced processing: high-performance Na2+2xFe2-x(SO4)3 cathodes enabled by spray-drying and CNTs/Mg2+ co-strategy","authors":"Lei Ming ,&nbsp;Xizhao Wang ,&nbsp;Lang Zhao ,&nbsp;Xuan Long ,&nbsp;Yun Yu ,&nbsp;Xinyou He ,&nbsp;Xiangdong Zhu ,&nbsp;Zhen Yao ,&nbsp;Wei Xu ,&nbsp;Xing Ou","doi":"10.1016/j.electacta.2026.148511","DOIUrl":"10.1016/j.electacta.2026.148511","url":null,"abstract":"<div><div>Low-cost iron-based polyanion cathode materials serve as an integral part of sodium-ion batteries (SIBs) that efficiently address today's energy challenges driving the transition toward cleaner and more affordable energy storage solutions. Unfortunately, these materials often suffer from poor electronic conductivity and difficulty in preparing pure phases, which constrains their large-scale application. Hence, we constructed carbon nanotubes (CNTs) incorporation and Mg<sup>2+</sup> doping Na<sub>2+2x</sub>Fe<sub>2−x</sub>(SO<sub>4</sub>)<sub>3</sub> materials by spray-drying and low-temperature sintering processes. This modification not only facilitated the preparation of a pure phase but also significantly reduced electrode polarization, including the voltage hysteresis and lattice stress during cycling. Consequently, the as-prepared cathode achieved a specific capacity of 92.3 mAh/g at 0.1 C and demonstrated excellent capacity retention of 97.84% (at 10C) and 76.96% (at 20C) after 1000 cycles. Importantly, the material exhibited a highly reversible single-phase solid solution sodium storage mechanism; furthermore, Mg<sup>2+</sup> doping effectively suppressed both the irreversible Fe<sup>3+</sup> migration and the excessive contraction-relaxation of Fe<sub>2</sub>O<sub>10</sub> dimers. This work demonstrated an effective strategy for the practical application of NFS-based cathodes in SIBs.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"557 ","pages":"Article 148511"},"PeriodicalIF":5.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146231317","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
Electrodeposited V2O5·nH2O Thin film with superior Mg2+ storage and electrochromic properites 具有优异Mg2+存储和电致变色性能的电沉积V2O5·nH2O薄膜
IF 5.6 3区 材料科学
Electrochimica Acta Pub Date : 2026-05-01 Epub Date: 2026-02-15 DOI: 10.1016/j.electacta.2026.148457
Yuancheng Yao , Jinhuan Yao , Jiqiong Jiang , Xin Tang , Jianwen Yang , Yanwei Li
{"title":"Electrodeposited V2O5·nH2O Thin film with superior Mg2+ storage and electrochromic properites","authors":"Yuancheng Yao ,&nbsp;Jinhuan Yao ,&nbsp;Jiqiong Jiang ,&nbsp;Xin Tang ,&nbsp;Jianwen Yang ,&nbsp;Yanwei Li","doi":"10.1016/j.electacta.2026.148457","DOIUrl":"10.1016/j.electacta.2026.148457","url":null,"abstract":"<div><div>Developing bifunctional materials with concurrent electrochromic and electrochemical energy storage capabilities is crucial for advancing the construction of energy-saving smart windows, smart sensors, implanted displays, and electronic skins. Herein, a layered V<sub>2</sub>O<sub>5</sub>·<em>n</em>H<sub>2</sub>O thin film is fabricated through a facile electrodeposition method with V<sub>2</sub>O<sub>5</sub> sol as electrolyte, and its Mg<sup>2+</sup>storage and electrochromic performances are explored for the first time. This layered V<sub>2</sub>O<sub>5</sub> film exhibits outstanding Mg<sup>2+</sup> storage performance, delivering an areal specific capacity of 17 μAh cm<sup>−2</sup> at 0.5 mA cm<sup>−2</sup>, showing no capacity decay during 500 cycles, and exhibiting superior rate performance. It achieves an optical contrast (Δ<em>T</em>) of 64.63 % at 769 nm wavelength (between orange-red and dark green) and a rapid switching speed. Notably, the color transition exhibits a distinct potential dependence and high optical distinguishability: it reversibly switches between green, orange, and red hues at discrete potential points during the electrochemical cycling process. The structure/performance relationship of the film is analyzed via in situ Raman, <em>ex situ</em> XRD, XPS, and DFT calculations. This study provides clues for developing Mg<sup>2+</sup>-intercalation-based electrochromic energy storage bifunctional materials.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"557 ","pages":"Article 148457"},"PeriodicalIF":5.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146205669","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
Neural network approach for predicting and interpreting specific capacitance in heteroatom-doped graphene supercapacitors 预测和解释杂原子掺杂石墨烯超级电容器比电容的神经网络方法
IF 5.6 3区 材料科学
Electrochimica Acta Pub Date : 2026-05-01 Epub Date: 2026-02-18 DOI: 10.1016/j.electacta.2026.148490
Muhammad Ishtiaq , Hong JaeYong , Kwon-Koo Cho , Sung-Gyu Kang , Jaekyung Sung , N.S. Reddy
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