Electrochimica Acta最新文献

{"title":"Operando Visualization of Li Distribution in Solid-State Batteries Using Focused Ion Beam-Secondary Ion Mass Spectrometry Imaging","authors":"Sayantan Sharma, Alexander Santiago, Maria Martinez-Ibañez, Mathieu Gerard, Athira Suresh Kumar, Olivier De Castro, Tom Wirtz, Santhana Eswara","doi":"10.1016/j.electacta.2025.146728","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146728","url":null,"abstract":"A thorough understanding of lithium transport pathways through electrode/electrolyte during battery operation is crucial for developing high-performance all-solid-state batteries (SSBs). However, limitations in existing characterization techniques make real-time tracking of lithium transport challenging. In this article, we report on the development of a setup for <em>operando</em> secondary electron (SE) and secondary ion mass spectrometry (SIMS) imaging of SSBs. We designed a specialized electrochemical cycling setup and a sample holder, enabling simultaneous battery operation and SE-SIMS imaging inside a prototype platform that combines a dual-beam focused ion beam-scanning electron microscope (FIB-SEM) with a double-focusing magnetic sector SIMS system (referred hereafter as FIB-SEM-SIMS). The developed setup allows battery cycling using a commercial potentiostat while maintaining the necessary sample bias for simultaneous SIMS imaging. To demonstrate the capabilities of this setup, we imaged lithium-ion transport in a solid-state Li-half cell with a ⁶Li rich foil working electrode. A chronopotentiometry (CP) sequence was applied to the half-cell within the FIB-SEM-SIMS instrument. SIMS analysis at various stages of the CP sequence captured changes in ⁶Li content in the electrolyte, resulting from ⁶Li ion migration from the working electrode due to the applied current. The methodology described here enables real-time visualization of transient changes in the spatial distribution of Li during battery operation, making it highly valuable for detailed investigations of ion transport pathways in SSBs. We also discuss strategies to minimize probable measurement artifacts arising from use of charged ion and electron beams for <em>operando</em> analysis.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"180 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144311713","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}

{"title":"Synchrotron-tailored hierarchical carbon nanofibers with ZnO decoration for long-lifespan potassium metal batteries","authors":"Yuenan Li ,&nbsp;Shuaitong Liang ,&nbsp;Shuoshuo Liu ,&nbsp;Yinzhao Sun ,&nbsp;Junping Miao ,&nbsp;Yiding Lu ,&nbsp;Kai Qian ,&nbsp;Mengyao Lv ,&nbsp;Changsheng Guo ,&nbsp;Pengju Han ,&nbsp;Xiang Li ,&nbsp;Weili Shao ,&nbsp;Jianxin He","doi":"10.1016/j.electacta.2025.146726","DOIUrl":"10.1016/j.electacta.2025.146726","url":null,"abstract":"<div><div>Potassium metal batteries (KMBs) are a strong alternative to lithium-ion batteries due to their high energy density and low cost. However, uneven potassium deposition and dendrite growth can lead to short circuits, limiting their application. Research has demonstrated that loading potassium onto appropriate carriers such as porous carbon nanofibers (CNFs) can effectively suppress dendrite formation. In this study, we develop a dendrite-free potassium metal composite anode material, ZnO@CNFs, with porous CNFs as the conductive framework, to regulate potassium deposition via conversion reactions. We used cutting-edge analytical techniques and theoretical computations to explore the mechanism for enhancing K⁺ deposition in the pores and improving electrolyte wetting efficiency in high-porosity structures. The spatial distribution of the ZnO component, coupled with its potassium-affinitive properties, generates a synergistic effect, effectively promoting the interface insertion/extraction dynamics of K⁺. These innovative approaches offer a significant technological pathway for the development of long-cycle-life KMBs.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"536 ","pages":"Article 146726"},"PeriodicalIF":5.5,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144311714","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}

{"title":"Ionic conductivity and transport mechanism in Sm-doped CeO2 ceramics prepared from ionic gelation-derived oxide powders","authors":"B.M.G. Melo ,&nbsp;D. Nicheva ,&nbsp;V. Ilcheva ,&nbsp;V. Boev ,&nbsp;G. Avdeev ,&nbsp;T. Petkova ,&nbsp;S․Soreto Teixeira ,&nbsp;L.C. Costa","doi":"10.1016/j.electacta.2025.146725","DOIUrl":"10.1016/j.electacta.2025.146725","url":null,"abstract":"<div><div>Rare-earth-doped ceria is being investigated for applications, such as solid oxide fuel cells (SOFCs), oxygen sensors, thermobarrier coatings, among others. In all these applications, finely dispersed starting powders are essential for preparing ceramics with parameters that meet technological requirements.</div><div>In the present work, Sm-doped CeO₂ ceramics were prepared by ionic gelation (IG) and subsequent thermal treatment. Ionic solutions of sodium alginate and metal nitrates (Ce(NO₃)₃.H₂O, Sm(NO₃)₃.H₂O) were gelled, followed by a thermal treatment at 500 °C for 4 h to obtain powders. After, they were pressed into pellets and sintered at 1400 °C to form dense ceramics.</div><div>The as prepared Ce_1-xSm_xO_2-x/2 (<em>x</em> = 0.1, 0.2, 0.3, 0.4, 0.5) materials were characterized morphologically and structurally by scanning electron microscopy (SEM), X-ray diffraction (XRD) and infrared spectroscopy (IR). XRD analysis confirms samarium incorporation in the CeO₂ lattice, evidenced by diffraction peaks shifts.</div><div>The ceramics relative density, a key factor for the reliable performance of electrolyte materials was also analyzed.</div><div>AC impedance analysis was performed to study the ionic conductivity of the obtained ceramics.</div><div>The impedance data were modeled using equivalent circuits to study the ionic conductivity and the electrolyte materials transport mechanisms. The bulk, grain boundary and total conductivity were analyzed and compared to all compositions. The intrinsic grain boundary conductivity and space-charge layer properties were further studied using a Mott-Schottky approximation to investigate the doping effect.</div><div>This study demonstrates the potential of ionic gelation for the synthesis of Sm-doped CeO₂ ceramics with controlled structural and electrochemical properties, making them suitable for SOFCs applications.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"536 ","pages":"Article 146725"},"PeriodicalIF":5.5,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144311717","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}

{"title":"Study on the self-healing mechanism of corrosion product film on EW75 Mg alloy","authors":"Yingwei Song ,&nbsp;Fuchun Chang ,&nbsp;Kaihui Dong ,&nbsp;Yong Cai ,&nbsp;En-Hou Han","doi":"10.1016/j.electacta.2025.146730","DOIUrl":"10.1016/j.electacta.2025.146730","url":null,"abstract":"<div><div>A compact corrosion product film can be spontaneously formed on the surface of EW75 Mg alloy in NaCl solution. In particular, this corrosion product film can realize self-healing after scratched. The self-healing mechanism was investigated by Scanning Electron Microscope (SEM), electrochemical tests and local pH measurements. The results show that self-healing is attributed to the formation of micro-galvanic cell between the scratched anodic area and unscratched cathodic area, which promotes the rapid regeneration of the corrosion product film in the damaged regions. Moreover, the local pH and Rare Earth (RE) ion concentrations at the scratch edge are higher than those in other regions, which results in a higher regeneration rate. As the scratch widths increase, the cathode/anode area ratios decrease, and the galvanic effect weakens, resulting in the slower self-healing rate and the prolonged time for achieving self-healing, but all samples with different scratch widths can still realize self-healing.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"536 ","pages":"Article 146730"},"PeriodicalIF":5.5,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144311716","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}

{"title":"Optimization of Porous Carbon Structure through High-Temperature Pyrolysis for Enhanced Electrochemical Performance of Supercapacitors","authors":"Lipeng Wang, Siyu Chen, Leandro N. Bengoa, Rosa M. Gonzalez-Gil, Pedro Gomez-Romero","doi":"10.1016/j.electacta.2025.146722","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146722","url":null,"abstract":"Herein, phosphoric acid activation followed by high-temperature pyrolysis is employed to synthesize high-performance porous carbon materials using sustainable biomass (almond shells) as the precursor. The almond shell-derived porous carbon materials exhibited a large specific surface area (1164/1395 m²/g) and high pore volume (1.39/1.40 cm³/g). After high-temperature pyrolysis at 1000°C, the biomass-derived porous carbon material AC600(1000) exhibited a larger average pore size with a hierarchical pore structure (micropores-mesopores). AC600(1000) also possessed more graphite domain structures, defects, and abundant surface oxygen-containing functional groups. In a symmetric cell configuration with 6 M KOH electrolyte, the optimized AC600(1000) operates stably over a wide voltage range (0-1.5 V), demonstrating a high specific capacitance of 142.15 F/g at 0.5 A/g. It also exhibites excellent rate performance, retaining a high specific capacitance of 106.38 F/g even at 20 A/g (74.83% capacitance retention), while the unoptimized AC600 achieved only 45.66 F/g (35.48% capacitance retention). Furthermore, it preserved 88.4% of its initial capacitance after 20,000 cycles at a current density of 5 A/g (almost 100% coulombic efficiency). This study shows proper synthetic routes that can boost significantly the performance of biomass derived carbons for supercapacitors, providing insights into structure-electrochemistry correlation. Thus, a sustainable and scalable production of carbon materials from biomass for energy storage applications is presented, which could promote the use of these materials on an industrial scale.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"252 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144305152","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}

{"title":"Electrochemical detection of carcinogenic 4-aminophenol with Pt@PPyC-SnS2 nanocomposites for environmental remediation","authors":"M. Faisal ,&nbsp;M.M. Alam ,&nbsp;Jahir Ahmed ,&nbsp;Muneera S.M. Al-Saleem ,&nbsp;Amjad E. Alsafrani ,&nbsp;Jehan Y. Al-Humaidi ,&nbsp;Jari S. Algethami ,&nbsp;Khalid A. Alzahrani ,&nbsp;Farid A. Harraz ,&nbsp;Mohammed M. Rahman","doi":"10.1016/j.electacta.2025.146723","DOIUrl":"10.1016/j.electacta.2025.146723","url":null,"abstract":"<div><div>Fabricating very sensitive and selective electrochemical sensors to detect 4-aminophenol (4-AP) is important for environmental monitoring and quality control. This study developed a new efficeint nanocomposite materials comprising platinum nanoparticles (Pt NPs) with polypyrrole-coated tin disulfide (SnS₂) nanocomposites (Pt@PPyC-SnS₂ NCs) and used it to develop an electrochemical sensor using glassy carbon electrode (GCE) with conducting coating binder as PEDOT:PSS polymer. We tested the sensor by utilizing linear sweep voltammetry (LSV) in phosphate-buffered solution (PBS) with different concentrations of 4-AP. The Pt@PPyC-SnS₂ NCs sensor has excellent analytical properties, with a wide linear response range (LDR) of 10–100 μM and a lowest detection limit of 0.30 ± 0.015 μM for 4-AP. The sensor was very selective towards 4-AP even when there were other substances that were not affected it. The sensitivity was calculated from the slope of calibration curve by considering the surface area as 24.8259 μAμM⁻¹cm⁻². The sensor also exhibited remarkable stability and was effectively used for the precise measurement of 4-AP in real water samples during validation. The Pt@PPyC-SnS₂ NCs/PEDOT:PSS/GCE sensor had better sensitivity and good selectivity because of the combined effects of the Pt nanoparticles, polypyrrole coating, tin disulfide nanosheets, and conducting coating polymer binder (PEDOT:PSS). These fabricated Pt@PPyC-SnS₂ NCs/PEDOT:PSS materials improved electrocatalytic activity and charge transfer kinetics. The sensor (Pt@PPyC-SnS₂ NCs/PEDOT:PSS/GCE) that was prepared is a promising nanocomposite materials to efficiently detect the target 4-AP electrochemically with the highest sensitivity and good selectivity. It might be used in environmental monitoring and quality control for the safety of environmental and healthcare fields by electrochemical approaches in a broad scales.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"536 ","pages":"Article 146723"},"PeriodicalIF":5.5,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144305153","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}

{"title":"A holistic corrosion understanding in IN625 alloy based on additive manufacturing history and microstructure modification","authors":"Toushiqul Islam ,&nbsp;Bo Zhao ,&nbsp;Dominic Piccone ,&nbsp;Ryan Bertelsen ,&nbsp;Dong Lin ,&nbsp;Zhaoyan (Andy) Fan ,&nbsp;Jonah Klemm-Toole ,&nbsp;Shuaihang Pan","doi":"10.1016/j.electacta.2025.146697","DOIUrl":"10.1016/j.electacta.2025.146697","url":null,"abstract":"<div><div>Alloy design for harsh environments, such as Nickel-based IN625, is critically contingent on deciphering the process-microstructure-corrosion linkages inherent to additive manufacturing (AM) techniques. While prior research has emphasized the advantages of AM over conventional manufacturing, a limited understanding persists regarding how distinct AM methodologies, e.g., laser powder bed fusion (LPBF), wire directed energy deposition (DED), and wire arc additive manufacturing (WAAM), influence corrosion performance, impeding corrosion-targeted strategic selection of AM procedures. This study systematically investigates the microstructural evolution of as-built IN625 produced via LPBF, wire-DED, and WAAM, correlating processing histories with microstructural features (e.g., grain morphology, element segregation, and unavoidable defects) and resultant distinct corrosion behavior. Our key findings demonstrate that LPBF IN625 exhibits superior corrosion resistance compared to both DED and WAAM counterparts, attributable to refined grain structures, enhanced solid-solution element distribution, and minimal defects. However, WAAM specimens witness a significant variability in corrosion resistance across different WAAM history accompanied by element segregation. Accelerated galvanic corrosion in WAAM components can be further linked to Titanium (Ti) segregation within Laves phases, promoting higher micro-galvanic activity. DED, with less controllability for defects like porosity, unfortunately further sacrifices its corrosion resistance. Crucially, this work introduces a quantitative predictive framework, correlating grain size, secondary phase distribution, and porosity defects with corrosion kinetics through an extended empirical model. These insights advance the fundamental understanding of AM process-microstructure-corrosion relationships, enabling physics-driven optimization of AM parameters to tailor IN625 components for demanding corrosive environments from aerospace to energy systems.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"535 ","pages":"Article 146697"},"PeriodicalIF":5.5,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144290492","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}

{"title":"Adsorption of porphyrins on bismuth – Ionic liquid interface: Model adsorbates to study organic/ionic liquid hybrid systems","authors":"August Luure ,&nbsp;Liis Siinor ,&nbsp;Erki Enkvist ,&nbsp;Piret Pikma ,&nbsp;Heigo Ers","doi":"10.1016/j.electacta.2025.146724","DOIUrl":"10.1016/j.electacta.2025.146724","url":null,"abstract":"<div><div>Studying organic/ionic liquid hybrid systems is a stepping stone towards designing increasingly complex interfaces for a wide range of applications: photovoltaics, photocatalysis, CO₂ reduction, and hydrogen evolution reactions. A good understanding of organic adlayer formation processes from ionic liquids requires a reliable and systematic experimental and theoretical approach. Here, we employ a combination of electrochemical methods together with a controlled experimental setup to characterise in detail the adsorption and adlayer formation processes of tetraphenylporphyrin from ionic liquids on Bi(111) surface. The investigation of these complex systems leads us to conclude that the adlayer formation highly depends on the ionic liquid molecular structure and properties.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"536 ","pages":"Article 146724"},"PeriodicalIF":5.5,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144305154","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}

{"title":"Enhanced surface properties and electrochemical performance of carbon-based screen-printed electrodes via hydrogen peroxide activation","authors":"Rebeca Jiménez-Pérez ,&nbsp;María Isabel González-Sánchez ,&nbsp;Alicia Gomis-Berenguer ,&nbsp;Jesús Iniesta ,&nbsp;Edelmira Valero","doi":"10.1016/j.electacta.2025.146721","DOIUrl":"10.1016/j.electacta.2025.146721","url":null,"abstract":"<div><div>Electrochemical activation of carbon inks from screen-printed electrodes is a key step in the development of high-performance electrochemical (bio)sensors. In this work, several carbon-based screen-printed surfaces, including amorphous carbon, multi-walled carbon nanotubes, graphene, graphene oxide and mesoporous carbon inks have been electrochemically activated by cyclic voltammetry in the presence of H₂O₂ and characterized by HRSEM, Raman spectroscopy, XPS, sheet resistance, cyclic voltammetry and EIS. The carbonaceous materials showed different surface chemistry and morphology after activation, arising from different features such as defects concentration, inter-defect distances, formation of holey material and changes in surface functionalization. The techniques used in this study showed that electroactivation altered the crystallinity and defect level of carbon surfaces, thereby leading to an improvement in the reversibility of several redox probes, as tested by cyclic voltammetry. Impedance measurements confirmed that all activated electrodes exhibited reduced charge transfer resistance. To explore possible applications of the activated carbonaceous surfaces, the reactivity of these electrodes (before and after activation) in the presence of NH₃(aq) in alkaline medium was also studied. Activated surfaces exhibited a significant inhibition effect on both the ORR and OER in the presence of ammonia, characterized by a shift towards more positive potentials and a reduction in current intensity in both processes. In particular, activated MWCNTs showed linear dependences of the potential and maximum current intensity of the ORR peak in the ranges 50–300 mM and 0–200 mM, respectively. These results can be of interest since the activated surfaces could be applied as underlying materials for the development of highly sensitive ammonia carbon-based sensors.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"536 ","pages":"Article 146721"},"PeriodicalIF":5.5,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144296242","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}

{"title":"Realizing ultra long-cycle stability and reversibility for Li-O2 batteries with electron mobility modulated NiAl LDH@Cu2S heterostructure","authors":"Rouyan Guo ,&nbsp;Congcong Dang ,&nbsp;Yiping Liu ,&nbsp;Guangqi Zhang ,&nbsp;Lingti Kong ,&nbsp;Liancheng Zhao ,&nbsp;Liming Gao","doi":"10.1016/j.electacta.2025.146710","DOIUrl":"10.1016/j.electacta.2025.146710","url":null,"abstract":"<div><div>Developing an efficient and highly catalytic cathode is crucial to the advancement of rechargeable Li-O₂ batteries for utilizing their high theoretical energy density. However, due to the sluggish kinetics of the oxygen-involved reactions, the problems of short lifespan and large overpotential prevent their widely practical applications. Thus, cathodes are designed to enhance the adsorption capacity for oxygen and modulate the electron mobility for Li-O₂ batteries. Herein, NiAl layered double hydroxide (LDH)@Cu₂S heterostructure with extremely large specific surface area and numerous exposed active sites is designed, combining snowflake-shaped Cu₂S and dispersed two-dimensional layered NiAl LDH. Excitingly, NiAl LDH@Cu₂S cathode exhibited a large specific discharge capacity of 14,519 mAh g^-1 at a current density of 100 mA g^-1 and prolonged cycle life up to 275 cycles at 300 mA g^-1 with a cut-off capacity of 600 mAh g^-1, accompanied by a low discharge overpotential of 0.14 V at the first cycle. Theoretical calculations demonstrated that the excellent electrochemical performance stems from the optimized adsorption energy of the NiAl LDH@Cu₂S structure for reactants and intermediate products, which reduces the energy barrier of discharge/recharge process. Therefore, benefited from the modulation of electron mobility and the promoted adsorption of oxygen, NiAl LDH@Cu₂S heterojunction can display remarkable cycle stability and reversibility as the cathode catalyst, suggesting great application prospects for enhanced Li-O₂ batteries.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"536 ","pages":"Article 146710"},"PeriodicalIF":5.5,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144296243","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}