Journal of Electroanalytical Chemistry最新文献

{"title":"Advanced cathode design strategies for emerging sodium‑selenium batteries","authors":"Leqian Chu ,&nbsp;Shuanghui Lv ,&nbsp;Yangxiaoyu Yang ,&nbsp;Song Lei ,&nbsp;Lijun Lin ,&nbsp;Mingjie Yi ,&nbsp;Jianhui Huang","doi":"10.1016/j.jelechem.2025.119086","DOIUrl":"10.1016/j.jelechem.2025.119086","url":null,"abstract":"<div><div>Rechargeable sodium‑selenium (Na<img>Se) battery is an emerging electrochemical energy storage technology in recent years. Abundant Na resources in the Earth's crust and intrinsic high capacity of Se render Na<img>Se battery very promising to become an available high-energy system. Nevertheless, significant challenges from Se cathodes, covering low reactivity of active materials, shuttle effect of intermediates, dramatic volume variation of electrodes, and sluggish kinetics, are hampering sustainable development of Na<img>Se batteries. Various advanced strategies have been proposed to tackle these central issues in Na<img>Se batteries. In this review, we comprehensively summarize recent progress on design strategies for advanced Na<img>Se batteries, involving electrochemical principles, key challenges, design strategies, real applications, and favorable perspectives.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"988 ","pages":"Article 119086"},"PeriodicalIF":4.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143839398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SOC estimation of lithium-ion batteries using equivalent circuit model and Nyquist plots from EIS data: A machine learning approach","authors":"Xinyi Zhang ,&nbsp;Luping Zhang ,&nbsp;Jiahao Wu ,&nbsp;Wenqi Bai ,&nbsp;Houde Dai ,&nbsp;Haijun Lin ,&nbsp;Fu Zhang ,&nbsp;Yuxiang Yang","doi":"10.1016/j.jelechem.2025.119093","DOIUrl":"10.1016/j.jelechem.2025.119093","url":null,"abstract":"<div><div>Lithium-ion batteries (LIBs) are currently the most widely used new energy storage devices, whose state of charge (SOC) estimation is critical for their safe operation. Electrochemical impedance spectroscopy (EIS) reveals detailed characteristics of the LIB's electrochemical state, making it useful for SOC estimation. This paper proposes a SOC estimation method based on random forest (RF) combined with a convolutional neural network (CNN) (RF-CNN algorithm) using an equivalent circuit model (ECM) and Nyquist plots from EIS data. Firstly, the ECM parameters are fitted from the 1D EIS data. Then, CNNs are employed to extract the image features (shapes and edges) from the 2D Nyquist plot of EIS data. Finally, the fitted ECM parameters, along with the extracted image features, serve as inputs for the RF algorithm, in which Optuna is utilized for hyperparameter tuning to refine SOC estimation. Experiments on open-access EIS datasets of LIBs demonstrate that the proposed SOC estimation method achieves the best performance in terms of accuracy and speed with a determination coefficient of 0.9926 in 5-fold cross-validation. By integrating 1D ECM parameters with 2D Nyquist plot features, this paper establishes an effective SOC estimation method for LIBs based on the RF-CNN machine learning approach and has important reference values for battery SOC estimation based on small-sample EIS datasets.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"987 ","pages":"Article 119093"},"PeriodicalIF":4.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel 3D framework loaded with MnO2 for high-performance aqueous zinc-ion battery cathode","authors":"Haodong Ding,&nbsp;Yingying He,&nbsp;Xuelian Yu,&nbsp;Lijun Chen,&nbsp;Mingze Chen,&nbsp;Yongming Luo,&nbsp;Jiarun Li,&nbsp;Sichen Wei","doi":"10.1016/j.jelechem.2025.119101","DOIUrl":"10.1016/j.jelechem.2025.119101","url":null,"abstract":"<div><div>The rising need for energy storage solutions has generated substantial interest in the exploration of advanced battery technologies. Due to their environmental sustainability and affordability, aqueous zinc-ion batteries (AZIBs) have attracted significant attention. This research presents a MnO₂@rGO@HCS cathode material featuring a distinctive ordered 3D hierarchical framework synthesized by the hydrothermal method. The non-template in-situ grown hollow carbon spheres (HCS) on reduced graphene oxide (rGO) create a comprehensive ordered network of channels that can serve as “highways” for electrolyte transport. MnO₂ nanoparticles are then uniformly deposited within this framework, forming numerous “service stations” that provide ample ion storage sites along the transport pathways. This architecture not only accelerates ion transport but also significantly improves ion storage capacity. Electrochemical tests reveal that the MnO₂@rGO@HCS cathode achieves exceptional performance with a specific capacity of 405 mA h·g⁻¹ at 0.2 A·g⁻¹ current density. This study offers a new approach for constructing a 3D ordered microstructure supported by HCS to efficiently load active materials as high-performance cathodes for AZIBs.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119101"},"PeriodicalIF":4.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent advances in surface oxophilicity modification of catalyst for promoting electrocatalytic alkaline hydrogen oxidation reaction","authors":"Le Li ,&nbsp;Donglei Yang ,&nbsp;Li Ying ,&nbsp;Shuanqiang Liu","doi":"10.1016/j.jelechem.2025.119100","DOIUrl":"10.1016/j.jelechem.2025.119100","url":null,"abstract":"<div><div>Improving the kinetics of alkaline hydrogen oxidation reaction (HOR) is the key point for developing anion-exchange membrane fuel cells. Surface oxophilicity modification of catalysts has been demonstrated to be an effective strategy for substantially accelerating the kinetics of alkaline HOR, while the mechanism of HOR and the influences of surface oxophilicity modification on the performance of catalysts is still unclear and under debate. Against this background, this review starts by discussing the HOR mechanism and the prevailing theories, including the hydrogen binding energy (HBE), bifunctional and some other theories. Next, the effects of surface oxophilicity on HOR activity are also emphasized, which include the regulation of HBE and hydroxyl binding energy (OHBE), weakening the binding strength of CO, and improving the antioxidation capability. Moreover, the applications of various electrocatalysts with high surface oxophilicity toward electrocatalytic HOR are also manifested. Lastly, the remaining controversies about the modification of surface oxophilicity and alkaline HOR mechanisms as well as the possible directions of this field are also outlined.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119100"},"PeriodicalIF":4.1,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MoS2 nanosheets decorated MoO2 on carbon electrode with electron-abundant reinforcement effect for boosting electrocatalytic hydrogen production","authors":"Liufang He ,&nbsp;Mengliang Hu ,&nbsp;Yuanpeng Qian ,&nbsp;Shuqi Cao ,&nbsp;Yulan Lu ,&nbsp;Meng Qin ,&nbsp;Liping Li","doi":"10.1016/j.jelechem.2025.119099","DOIUrl":"10.1016/j.jelechem.2025.119099","url":null,"abstract":"<div><div>Advancing electrocatalytic hydrogen evolution technologies critically depends on the development of inexpensive, high-performance electrocatalysts. Although molybdenum dioxide (MoO₂) and molybdenum disulfide (MoS₂) are regarded as promising non-precious metal electrocatalysts, their limited catalytic activity and low electrical conductivity hinder their broader application in electrocatalytic water splitting. In this work, a high-performance electrode, MoS₂-decorated MoO₂ grown on carbonized wood (MoS₂-MoO₂/CW), was fabricated through a combined hydrothermal and chemical vapor phase deposition (CVD) strategy. The synergistic formation of the heterostructure between MoS₂ and MoO₂ endows the electrode with superior performance compared to individual catalysts, thereby significantly accelerating the hydrogen evolution efficiency. Specifically, XPS analysis reveals that the coupling of MoS₂ and MoO₂ facilitates rapid electron transfer on the electrode surface. This not only accelerates the escape rate of H₂ but also enhances the catalytic activity for the hydrogen evolution reaction (HER). As a result, the well-designed electrode exhibies a low overpotential (106 mV) to drive 10 mA cm⁻², high double-layer capacitance, and excellent long-term stability of 100 h at a constant current density. The results offer useful guidelines for the development and fabrication of transition metal-based composite HER electrocatalysts.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119099"},"PeriodicalIF":4.1,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of hydrogen evolution kinetics of metal-doped MoS2 electrocatalysts by exploring the charge transfer coefficients","authors":"Nayana K ,&nbsp;Sunitha A.P.","doi":"10.1016/j.jelechem.2025.119095","DOIUrl":"10.1016/j.jelechem.2025.119095","url":null,"abstract":"<div><div>Charge transfer coefficient (α) is an intrinsic activity parameter of hydrogen evolution reaction (HER), as it deals with the fraction of supplied energy used to increase the HER kinetics. This article investigated the HER kinetics of MoS₂, aluminium (Al-MoS₂) and tin (Sn-MoS₂) doped MoS₂ nanostructures by estimating the exact values of α. This article proposes a simple method of the least square curve fitting of the Butler-Volmer equation on the experimentally produced polarization curve of HER to derive α. Since the charge transfer coefficient depends on the current density, in curve fitting, values of α are determined at three different current density regions. The correctness of the estimated α was verified by comparing it with the same derived from Tafel plots of experimental values. Overpotential, Tafel slope, Turnover frequency (TOF), double layer capacitance, electrochemically active surface area (ECSA) and exchange current densities were estimated to confirm the reliability of obtained α values. All electrocatalytic parameters show that Al-MoS₂ has excellent HER activity with overpotential: 249 mV at 10 mA/cm², Tafel slope: 67 mV/Dc, TOF: 0.32 s⁻¹, double layer capacitance: 17 mF/cm², ECSA: 425/cm² and Exchange current density: 1.38 mA/cm². The estimated value of α for Al-MoS₂ is 0.89 at the current density region −5 mA/cm² and − 15 mA/cm² which exhibit the excellent electrocatalytic activity of the catalyst. Estimation of the exact value of α will help to understand the exact electrocatalytic mechanism of the catalyst.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119095"},"PeriodicalIF":4.1,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mitigating effects of heavy metal ions in wastewater with enhanced stability in hydrogen generation","authors":"Sarah AlBlooshi ,&nbsp;Shubra Lalwani ,&nbsp;TieJun Zhang ,&nbsp;Nahla Alamoodi ,&nbsp;Roqaya A. Ismail ,&nbsp;Faisal AlMarzooqi","doi":"10.1016/j.jelechem.2025.119094","DOIUrl":"10.1016/j.jelechem.2025.119094","url":null,"abstract":"<div><div>For sustainable green hydrogen production, it is crucial to prioritize water-energy nexus, especially in water-scarce regions where it is challenging to deploy distilled water for electrolysis. We herein utilized heavy metal wastewater (HMWW) for H₂ generation (HER) but by first eliminating the heavy metal ions using membrane distillation (MD). As HM ions significantly interfere in HER (especially Cu), it is mandatory to utilize techniques such as MD that offer high rejection rate with low energy consumption to provide high quality treated water. The MD-treated water (permeate) was then explored as a water source in electrolyte with Pt/C as commercial HER electrode displayed a 14% decrease in HER overpotential with a 5 Ω decrease in charge transfer resistance in comparison to untreated wastewater (HMWW-feed). The initial studies indicated superior HER performance of permeate over HMWW-feed, probing comprehensive long-term HER electrochemical investigation to observe the prolonged impact of HM ions. From our observations amongst other HM ions in feed, particularly the exposure of Copper (Cu) ions, leading to electrodeposition on Pt/C electrode significantly deteriorated the electrochemical performance. The continuous exposure and electrodeposition of Cu on the Pt/C electrode declined the electrochemical active surface area (ECSA) by 75% in 72 h, leading to a 97% drop in the electrochemical stability of HER activity. On using MD-treated water (permeate), the electrode achieved a stability of 78%, approaching the HER performance of DI water as a water source (98.4%) post 72 h. The impact of HM ions was also reflected in the Faradic efficiency values for H₂ evolution that improved by 26% on using treated wastewater (permeate) instead of HMWW-feed. Therefore, leveraging MD-treated wastewater as a water source can facilitate the emergence of new sustainable solutions for H₂ generation with a low water footprint.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119094"},"PeriodicalIF":4.1,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nuclear magnetic resonance spectroscopy: A comprehensive tool for analyzing liquid products in electrochemical CO2 reduction","authors":"Aymen S. Abu Hatab ,&nbsp;Yahia H. Ahmad ,&nbsp;Mohamed F. Mady ,&nbsp;Yasser Hassan ,&nbsp;Abdelrahman Zkria ,&nbsp;Alessandro Sinopoli ,&nbsp;Aboubakr M. Abdullah ,&nbsp;Siham Y. Al-Qaradawi ,&nbsp;Tsuyoshi Yoshitake ,&nbsp;Mazen Khaled","doi":"10.1016/j.jelechem.2025.119097","DOIUrl":"10.1016/j.jelechem.2025.119097","url":null,"abstract":"<div><div>The electrochemical reduction of carbon dioxide (eCO₂RR) has become a very promising pathway that can be used in the transformation of CO₂ to important chemical products and, thus, is one of the mitigations of climate change and will contribute toward sustainable chemical production. This review aims at presenting the importance of Nuclear Magnetic Resonance spectroscopy (NMR) to analyze and quantify the liquid-phase products obtained by eCO₂RR. This provides a summary regarding the role that NMR plays in the process of reducing carbon dioxide. The following discusses the benefits: identification, complete elucidation, and follow-up on reactions involving CO₂ electro-reduction. Pulse experiments corresponding to different methods for water signal suppression are considered separately, outlining some recent developments in the interference water signal reduction which is very crucial for the correct NMR data acquisition in aqueous electrolytes. Certain selected products are described, like carbon monoxide (CO)-associated liquids, formic acid, methanol, and formaldehyde as examples of the NMR precision for the characterization of important compounds. Further, the quantification of C₂ products such as ethanol and acetate is discussed in order to illustrate how the technique can be applied in the elucidation of reaction mechanisms and optimization of catalyst performance. This review covers challenges, advanced methodologies, and emerging trends in order to underline the transformative role that NMR plays in advancing CO₂ electrochemical reduction toward sustainable chemical synthesis.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119097"},"PeriodicalIF":4.1,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Construction of Fe doped Co4S3/Ni3S2 composite for efficient alkaline freshwater and seawater oxidation","authors":"Shuangyan Lin ,&nbsp;Haoran Gao ,&nbsp;Tianle Li ,&nbsp;Zhikun Xu","doi":"10.1016/j.jelechem.2025.119098","DOIUrl":"10.1016/j.jelechem.2025.119098","url":null,"abstract":"<div><div>One of the most important and fundamental challenges for the production of hydrogen through seawater electrolysis is constructing strong and high-activity oxygen evolution reaction (OER) catalysts. In this paper, Fe-doped Co₄S₃/Ni₃S₂ (Fe-Co₄S₃/Ni₃S₂) composite was prepared by a one-step hydrothermal method. The doped Fe in Co₄S₃/Ni₃S₂ composite modifies the electronic structure and promotes electron transfer, leading to improved OER performance in alkaline freshwater and seawater. At 100 mA/cm⁻², Fe-Co₄S₃/Ni₃S₂ exhibits low overpotentials of 329 and 361 mV in alkaline freshwater and seawater, respectively. In particular, the overpotential in alkaline freshwater is reduced by 85 mV compared to the Co₄S₃/Ni₃S₂, and 112 and 145 mV compared to single-phase Co₄S₃ and Ni₃S₂. Additionally, the Fe-Co₄S₃/Ni₃S₂ can operate steadily at 100 mA cm⁻² for at least 100 h in alkaline seawater. The current study provides a facile method for preparation of efficient OER catalysts of sulfides by Fe doping in composite.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119098"},"PeriodicalIF":4.1,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Boosting Li+ transport kinetics and structural stability of Co-free LiNi0.9Mn0.1-xAlxO2 cathode materials","authors":"Xiaoyi Hou ,&nbsp;Leilei Hu ,&nbsp;Yibo Zhang ,&nbsp;Liang Zhao ,&nbsp;Xi Wu ,&nbsp;Haozhe Wu ,&nbsp;Yan Tan ,&nbsp;Yulong Kang ,&nbsp;Jiatai Wang","doi":"10.1016/j.jelechem.2025.119092","DOIUrl":"10.1016/j.jelechem.2025.119092","url":null,"abstract":"<div><div>This study successfully synthesized Li[Ni_0.9Mn_0.06Al_0.04]O₂ (NMA964) cathode material using an organic amine co-precipitation method combined with high-temperature solid-state synthesis. Mechanistic insight into Al³⁺ doping via theory-experiment synergy revealed that Al³⁺ doping plays a dual role in enhancing structural stability and electrochemical performance. First-principles calculations demonstrated that Al<img>O covalent bonds effectively suppress cation mixing and mitigate anisotropic stress during H2-H3 phase transitions, while experimental analyses confirmed that these bonds stabilize the host lattice against crack propagation. Additionally, Al³⁺ doping optimizes Li⁺ transport kinetics by reducing electrostatic repulsion between adjacent Li layers. As a result, the NMA964 cathode delivers an ultrahigh initial discharge capacity of 228.3 mAh g⁻¹ at 0.1C (2.5–4.3 V) and retains 165.9 mAh g⁻¹ after 100 cycles at 0.5C (72.6 % capacity retention), outperforming the undoped Li[Ni_0.9Mn_0.1]O₂ counterpart. This work provides atomic-level guidance for designing high-energy cathodes through targeted doping.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119092"},"PeriodicalIF":4.1,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}