Electrochimica Acta最新文献

筛选
英文 中文
Intensifying paired hydrogen peroxide (H2O2) electrosynthesis: Influence of electrolyte composition and light irradiation
IF 5.5 3区 材料科学
Electrochimica Acta Pub Date : 2025-05-30 DOI: 10.1016/j.electacta.2025.146551
Blanca Diana García Morales , Ismael F․ Mena , Oscar Andrés Jaramillo-Quintero , Cristina Sáez Jiménez , Hugo Olvera-Vargas , Manuel Andrés Rodrigo Rodrigo
{"title":"Intensifying paired hydrogen peroxide (H2O2) electrosynthesis: Influence of electrolyte composition and light irradiation","authors":"Blanca Diana García Morales ,&nbsp;Ismael F․ Mena ,&nbsp;Oscar Andrés Jaramillo-Quintero ,&nbsp;Cristina Sáez Jiménez ,&nbsp;Hugo Olvera-Vargas ,&nbsp;Manuel Andrés Rodrigo Rodrigo","doi":"10.1016/j.electacta.2025.146551","DOIUrl":"10.1016/j.electacta.2025.146551","url":null,"abstract":"<div><div>This study examines the feasibility of greener and more efficient (photo)electrosynthesis of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) by coupling the anodic and cathodic processes within the same cell and evaluating bicarbonate (HCO<sub>3</sub><sup>-</sup>) as an alternative electrolyte to sulfate (SO<sub>4</sub><sup>2-</sup>). Results confirm the viability of paired H<sub>2</sub>O<sub>2</sub> production in (photo)electrolyzers equipped with a carbon-based gas diffusion cathode (GDC) and a BiVO<sub>4</sub>-coated FTO anode. Under constant cell potential, higher electrolyte concentrations led to increased current, enhancing H₂O₂ production in the cathodic process but not in the anodic one, suggesting the occurrence of competing anodic reactions. Coulombic and energy efficiencies decreased with electrolyte concentration but improved under light irradiation, with blue light yielding the highest efficiency. The use of HCO<sub>3</sub><sup>-</sup> solutions enhanced H<sub>2</sub>O<sub>2</sub> production in electrocatalysis but was slightly less efficient than SO<sub>4</sub>²⁻ in photoelectrocatalysis. The highest energy efficiency was achieved with SO<sub>4</sub>²⁻ under blue light at 3.5 V, reaching 1.91 and 5.14 mmol H<sub>2</sub>O<sub>2</sub> Wh<sup>-1</sup> in the anodic and cathodic compartments, respectively, for a total of 7.05 mmol H<sub>2</sub>O<sub>2</sub> Wh<sup>-1</sup> (production rate of 0.45 μmol min<sup>-1</sup> and 0.34 mmol <span>l</span><sup>-1</sup> and faradaic efficiency of 132.4 %). In contrast, with HCO<sub>3</sub><sup>-</sup>, the anodic and cathodic efficiencies were 0.84 and 3.79 mmol H<sub>2</sub>O<sub>2</sub> Wh<sup>-1</sup>, respectively, resulting in a global efficiency of 4.63 mmol H<sub>2</sub>O<sub>2</sub> Wh<sup>-1</sup> (0.30 μmol min<sup>-1</sup>). These findings highlight the potential of paired (photo)electrosynthesis for improving H<sub>2</sub>O<sub>2</sub> production while considering electrolyte sustainability.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"533 ","pages":"Article 146551"},"PeriodicalIF":5.5,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169028","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
Hydrothermal Synthesis of Spinel Nickel Manganate Nanoparticles Modified Glassy Carbon Electrode: A Potential Tool for Low Level Detection of Fenamate Drug 水热合成尖晶石镍锰酸盐纳米颗粒修饰玻碳电极:一种有潜力的低水平检测芬那酯类药物的工具
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2025-05-29 DOI: 10.1016/j.electacta.2025.146578
Aravind Radha, Sea-Fue Wang
{"title":"Hydrothermal Synthesis of Spinel Nickel Manganate Nanoparticles Modified Glassy Carbon Electrode: A Potential Tool for Low Level Detection of Fenamate Drug","authors":"Aravind Radha, Sea-Fue Wang","doi":"10.1016/j.electacta.2025.146578","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146578","url":null,"abstract":"The study aims to create a fast and powerful catalyst for the electrochemical detection of the non-steroidal drug mefenamic acid (MA) for quality control and clinical evaluation. The simple hydrothermal process was used to make NiMn<sub>2</sub>O<sub>4</sub>, which was then changed with a glassy carbon electrode and used for MA electrochemical sensing. For electrochemical reactions, the NiMn<sub>2</sub>O<sub>4</sub> electrode offers efficient electron transport channels, accessible active sites, and efficient ion-transport pathways. Various spectroscopic and voltammetric techniques characterized the synthesized materials. We further analyzed the sensitivity and selectivity of the electrode using the DPV method. The NiMn<sub>2</sub>O<sub>4</sub>/GCE towards MA exhibits good selectivity, better stability, a low LOD (0.91 nM), a broad linear range (0.002-74.18 µM), and a good recovery percentage ± 98.26–99.24. The results of these tests with NiMn<sub>2</sub>O<sub>4</sub> toward MA show that it could be used to find biological samples like urine and blood serum. Further, as a fabricated electrode, it is a potential candidate for future electrochemical sensing applications.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"148 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165035","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
Three-dimensional electro-Fenton oxidation of levofloxacin with a cerium doped-acidified red mud and biochar particle electrode 铈掺杂酸化赤泥和生物炭颗粒电极三维电fenton氧化左氧氟沙星
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2025-05-29 DOI: 10.1016/j.electacta.2025.146581
Mengwei Song, Chunhui Guo, Ziqiao Xia, Bobin Tang, Kaixin Xia, Jinzhong Zhang
{"title":"Three-dimensional electro-Fenton oxidation of levofloxacin with a cerium doped-acidified red mud and biochar particle electrode","authors":"Mengwei Song, Chunhui Guo, Ziqiao Xia, Bobin Tang, Kaixin Xia, Jinzhong Zhang","doi":"10.1016/j.electacta.2025.146581","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146581","url":null,"abstract":"In this study, a cerium doped-acidified red mud and powder biochar particle electrode (ARM-PBC/Ce electrode) was fabricated with impregnation-coprecipitation-calcination method, and was employed in a three-dimensional electro-Fenton (3D/EF) system for levofloxacin (LEV) degradation. The preparation conditions of ARM-PBC/Ce electrode were optimized, and the electrode was characterized by various techniques. In contrast with RM, the ARM-PBC/Ce electrode had higher specific surface area, lower charge transfer resistance and excellent electrochemical performance, and the valence state conversions of Fe and Ce facilitated the generation of ⋅OH. Under the optimum degradation conditions (0.03 M Na<sub>2</sub>SO<sub>4</sub> solution, initial pH 5, ARM-PBC/Ce dosage 0.4 g, applied voltage 6 V, and aeration rate 300 mL⋅min<sup>−1</sup>), the removal efficiency of 10 mg·L<sup>−1</sup> LEV reached 95.82% in 60 min electro-Fenton oxidation, and the bacterial toxicity decreased significantly. The 3D/EF system demonstrated superior oxidation capability and energy efficiency compared to the 2D/EF system, and ⋅OH and ⋅O<sub>2</sub><sup>−</sup> were the dominant active species in the electro-Fenton oxidation of LEV. The potential degradation pathways, mainly including decarboxylation, demethylation, piperazine ring opening and hydroxylation, were proposed based on the identification of intermediate products and active species. Moreover, the particle electrode remained remarkable stability and reusability after five cycles, suggesting its promising potential for the efficient treatment of LEV in wastewater.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"366 1","pages":"146581"},"PeriodicalIF":6.6,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165094","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
Facile preparation of biochar from biomass-derived lignin and cellulose for determination of 4-nitrophenol and 2-nitrophenol 生物质木质素和纤维素制备生物炭测定4-硝基酚和2-硝基酚
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2025-05-29 DOI: 10.1016/j.electacta.2025.146420
Tianshuang Bao, Qi Wang, Hongxiang Li, Ying Su, Tong Guo, Jun Cao, Qiaoling Li, Weimeng Si
{"title":"Facile preparation of biochar from biomass-derived lignin and cellulose for determination of 4-nitrophenol and 2-nitrophenol","authors":"Tianshuang Bao, Qi Wang, Hongxiang Li, Ying Su, Tong Guo, Jun Cao, Qiaoling Li, Weimeng Si","doi":"10.1016/j.electacta.2025.146420","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146420","url":null,"abstract":"The complex components in biomass materials exhibit distinct pyrolysis behaviors. These behaviors lead to the diverse structures of biochar prepared by direct pyrolysis. Additionally, Nitrophenols display different electrochemical redox behaviors on various carbon materials. These factors impose limitations on the applications of both the biochar in the determination of nitrophenols. In this study, lignin and cellulose were extracted from poplar biomass via a simple alkaline pulping method. The obtained crude lignin and crude cellulose were pyrolyzed separately to produce two types of carbon materials: lignin-derived and cellulose-derived carbon. Lignin-derived carbon exhibited a closely packed structure of carbon nanoparticles, while cellulose-derived carbon had an interconnected macroporous structure. Lignin-derived carbon possessed an enhanced response for the electrochemical reduction of 4-nitrophenol, while cellulose-derived carbon had a higher response for 2-nitrophenol. During the reduction of 4-nitrophenol, the hydroxyl group content was the dominating factor. Moreover, the trace-doped N-species was more crucial for 2-nitrophenol reduction. The detection limit for 4-nitrophenol on lignin-derived carbon was 0.0174 nm and detection limit for 2-nitrophenol on cellulose-derived carbon 0.0203 μM.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"8 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165034","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
High-Performance Mesoporous Carbon@Dopamine Nanocomposite Sensor for Simultaneous Detection of Heavy Metal Ions in Environmental Monitoring 环境监测中同时检测重金属离子的高性能介孔Carbon@Dopamine纳米复合传感器
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2025-05-29 DOI: 10.1016/j.electacta.2025.146579
Raheel Akram, Javed Iqbal, S. Lokeswara Reddy, Anila Arshad, Jaroon Jakmunee
{"title":"High-Performance Mesoporous Carbon@Dopamine Nanocomposite Sensor for Simultaneous Detection of Heavy Metal Ions in Environmental Monitoring","authors":"Raheel Akram, Javed Iqbal, S. Lokeswara Reddy, Anila Arshad, Jaroon Jakmunee","doi":"10.1016/j.electacta.2025.146579","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146579","url":null,"abstract":"Heavy metal ion (HMI) sensors are critical tools for environmental monitoring, given the severe health risks associated with HMI overdosage. In this study, a high-performance mesoporous carbon@dopamine (MC@PDA) nanocomposite was developed as an efficient material for constructing a smart sensor capable of the simultaneous electrochemical detection of Cd<sup>2+</sup>, Cu<sup>2+</sup> and Hg<sup>2+</sup> ions. To investigate the role of template material, different electrocatalysts, such as CNT@PDA, CNH@PDA, and MC@PDA were compared. While all C@PDA materials exhibited electroactivity for HMI detection, mesoporous carbon (MC) demonstrated superior electrochemical activity due to its hierarchical micro-/mesoporous nanoarchitecture, optimized pore volume, and high surface area, which support enhanced electron transport, superior adsorption, catalytic activity, and functionalization. The MC@PDA exhibited improved peak currents over a wide large linear range of 100 nM-1.4 mM for the simultaneous detection of Cd<sup>2+</sup>, Cu<sup>2+</sup> and Hg<sup>2+</sup>, with limit of detections (LODs) of 63, 122, and 82 nM, respectively. For individual ion detection, the sensor achieved even lower LODs of 8.34, 4.36, 6.172 nΜ for Cd<sup>2+</sup>, Cu<sup>2+</sup> and Hg<sup>2+</sup>, respectively. Density functional theory (DFT) calculations were performed to unravel the distinct interaction mechanisms and energy variations between PDA and HMI. Moreover, the sensor was deployed for real-world water analysis from an industrial mining site with multiple contaminants, effectively detecting Cd<sup>2+</sup>, Cu<sup>2+</sup> ions. Results were validated using atomic absorption spectroscopy (AAS), confirming the method's reliability and practical applicability. The suggested technique will enable simultaneous detection of multiple analytes and uses interactive forces to efficiently distinguish analogue analytes.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"98 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165037","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
Economical Iron-nickel Bimetallic Electrocatalysis Enhanced Chlorine Evolution for Ammonia Removal in Wastewater 经济铁镍双金属电催化强化氯析出法去除废水中氨
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2025-05-29 DOI: 10.1016/j.electacta.2025.146580
Zhiyong Zhang, Aixing Chen, Ming-Lai Fu, Wenjie Sun, Huachun Lan, Baoling Yuan
{"title":"Economical Iron-nickel Bimetallic Electrocatalysis Enhanced Chlorine Evolution for Ammonia Removal in Wastewater","authors":"Zhiyong Zhang, Aixing Chen, Ming-Lai Fu, Wenjie Sun, Huachun Lan, Baoling Yuan","doi":"10.1016/j.electacta.2025.146580","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146580","url":null,"abstract":"The electrocatalytic removal of ammonia nitrogen (NH<sub>4</sub><sup>+</sup>-N) in wastewater is a promising technology for water treatment, but the high cost and limited catalytic efficiency of traditional electrodes present challenges. This study introduces a novel iron-nickel composite oxide electrode (FeNiO/GP) supported on graphite, achieving breakthrough performance in NH<sub>4</sub><sup>+</sup>-N wastewater remediation. It was exhibited dual enhancement in chlorine evolution reaction (CER) selectivity and oxygen evolution reaction (OER) suppression, as evidenced by an exceptional 0.212 V potential gap between OER (1.48 V) and CER (1.27 V). Through systematic optimization, the electrode demonstrates unparalleled removal efficiencies of 99.56% NH<sub>4</sub>⁺-N and 92.09% TN within 40 minutes under controlled conditions, maintaining robust performance (88.68% NH<sub>4</sub>⁺-N, 70.52% TN removal) in real industrial wastewater. Mechanistic investigations reveal a self-sustaining chlorine cycle where in situ generated active chlorine species drive ammonia oxidation. This work establishes a new paradigm for non-precious metal electrocatalysts in sustainable wastewater treatment, achieving high reaction kinetics with lower energy consumption. The FeNiO/GP electrode as an effective and low-cost solution for ammonia nitrogen removal, offering significant potential for practical wastewater treatment applications.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"25 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165038","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
Hierarchical Assembly of RuO2/MoOx/CoNi-LDH Nanocomposite for Enhanced Performance in Acidic Overall Water Splitting RuO2/MoOx/CoNi-LDH纳米复合材料在酸性整体水分解中的分层组装
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2025-05-29 DOI: 10.1016/j.electacta.2025.146577
Amir Said, Binbin Qian, Ruiqian Zhang, Chunlei Yang, Ke Xu, Kunfeng Chen, Dongfeng Xue
{"title":"Hierarchical Assembly of RuO2/MoOx/CoNi-LDH Nanocomposite for Enhanced Performance in Acidic Overall Water Splitting","authors":"Amir Said, Binbin Qian, Ruiqian Zhang, Chunlei Yang, Ke Xu, Kunfeng Chen, Dongfeng Xue","doi":"10.1016/j.electacta.2025.146577","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146577","url":null,"abstract":"The development of electrocatalysts with bifunctionality in acidic media is crucial for advancing proton exchange membrane water electrolyzers to produce clean hydrogen fuel. Herein, an efficient bifunctional <strong>RuO<sub>2</sub>/MoO<sub>x</sub>/CoNi-LDH</strong> nanocomposite was synthesized for the first time via a coprecipitation and two-step hydrothermal method and used as an electrocatalyst for hydrogen evolution (HER) and oxygen evolution reaction (OER), thereby contributing to efficient overall water splitting (OWS). When used as an electrocatalyst in 0.5 M H<sub>2</sub>SO<sub>4</sub>, the <strong>RuO<sub>2</sub>/MoO<sub>x</sub>/CoNi-LDH</strong> requires an overpotential of 185, 221, and 262 mV for OER and 33, 65, and 101 mV for HER to reach the current density of 20, 50, and 100 mA/cm<sup>2</sup>, respectively. The improved electrochemical performances of <strong>RuO<sub>2</sub>/MoO<sub>x</sub>/CoNi-LDH</strong> are well supported by a low charge transfer resistance, high electrochemical surface area, optimized nanocomposite structure, and the synergistic interaction among the RuO<sub>2</sub> NPs, MoO<sub>x</sub> nanosheet (NSs), and CoNi-LDH. Importantly, in acidic OWS, bifunctional <strong>RuO<sub>2</sub>/MoO<sub>x</sub>/CoNi-LDH</strong> exhibits excellent activities and merely requires a low voltage of 1.53 V to reach the current density of 20 mA/cm<sup>2</sup>, lower than most of the mixed-metal-based bifunctional electrocatalysts reported in acidic media. This study provides an efficient and cost-effective method for preparing high-performance mixed-metal nanocomposites for electrochemical water splitting in acidic environments and beyond.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"5 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165039","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
Li3InCl6 electrolyte with high voltage compatibility for Ni-rich layered oxide cathodes-based all-solid-state batteries 富镍层状氧化物阴极全固态电池用高电压相容性Li3InCl6电解质
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2025-05-28 DOI: 10.1016/j.electacta.2025.146568
Chen Liu, Siwu Li, Lin Li, Qiyue Luo, Liang Ming, Ziling Jiang, Ziyu Lu, Miao Deng, Jie Yang, Shijie Cheng, Chuang Yu
{"title":"Li3InCl6 electrolyte with high voltage compatibility for Ni-rich layered oxide cathodes-based all-solid-state batteries","authors":"Chen Liu, Siwu Li, Lin Li, Qiyue Luo, Liang Ming, Ziling Jiang, Ziyu Lu, Miao Deng, Jie Yang, Shijie Cheng, Chuang Yu","doi":"10.1016/j.electacta.2025.146568","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146568","url":null,"abstract":"The sulfide electrolyte-based all-solid-state batteries with high-nickel layered oxide cathodes face significant challenges due to the narrow electrochemical window of sulfides and severe side reactions caused by direct contact with high-voltage oxide cathode materials such as LiNi<sub>0.9</sub>Mn<sub>0.05</sub>Co<sub>0.05</sub>O<sub>2</sub> (NCM90). Here, we successfully synthesized Li<sub>3</sub>InCl<sub>6</sub> (LIC) halide electrolytes through ball-milling followed by annealing method, achieving the ionic conductivity of 2.0 mS cm<sup>−1</sup> at room-temperature. The interface between this electrolyte and NCM90 cathode material without any interface modification is stable. By introducing the LIC electrolyte layer, the NCM90/LIC+Cl1.5/Li-In battery exhibits significantly improved electrochemical performance at different temperatures, particularly in terms of initial discharge capacity. Notably, the battery demonstrates outstanding discharge capacity and cycling stability at low temperatures. Experimental investigations reveal that the introduction of the LIC electrolyte with high oxidation potential facilitates the H2-H3 phase transition in NCM90 during high-voltage operation, which is critical for enhancing the discharge capacity. This work provides fundamental insights into interfacial engineering strategies for high-voltage sulfide-based all-solid-state battery systems.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"134 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144153883","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
Electrochemical impedance of nitrogen-doped carbon with tunable mesoporous structure 介孔结构可调氮掺杂碳的电化学阻抗
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2025-05-28 DOI: 10.1016/j.electacta.2025.146570
A.V. Syugaev, K.A. Yazovskikh, A.N. Maratkanova
{"title":"Electrochemical impedance of nitrogen-doped carbon with tunable mesoporous structure","authors":"A.V. Syugaev, K.A. Yazovskikh, A.N. Maratkanova","doi":"10.1016/j.electacta.2025.146570","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146570","url":null,"abstract":"Mesoporous nitrogen-doped carbon is a promising material in energy storage and conversion technologies, including efficient electrocatalyst supports. One of the effective techniques for producing mesoporous N-doped carbon is the sacrificial support method that provides a mesoporous structure with a narrow pore size distribution and easy control of the specific surface area. The method involves three stages: (i) mixing nitrogen-rich organic compounds used as a precursor and colloidal silica as a sacrificial agent; (ii) pyrolysis of the prepared mixture; (iii) chemical removal of sacrificial silica. In this work, we present, for the first time, a detailed electrochemical impedance spectroscopy (EIS) study of the mesoporous N-doped carbon obtained from methyl (2-benzimidazole) carbamate mixed with colloidal silica (10-40 wt.%). The frequency response, real and imaginary parts of the complex capacitance, as well as the Mott-Schottky plots measured at different <em>a.c.</em> frequencies have been analyzed. With 20-40 wt.% SiO<sub>2</sub> added to the precursor, the mesoporous N-doped carbon samples have been shown to behave in the electrolyte as an almost ideal capacitor due to the high homogeneity of interfaces in open, easy-to-access mesopores with a narrow pore size range. The frequency response is well described by a short equivalent circuit, with distinguishing between contributions made by surfaces of pores formed under removal of SiO<sub>2</sub> and those formed under pyrolysis of the precursor, which are charged consecutively. It has been shown that the parameters calculated from the Mott-Schottky analysis (flat band potential, linear dependence coefficient) are almost independent of the <em>a.c.</em> frequency, which also indicates high homogeneity of the carbon material in mesoporous matrix obtained by the sacrificial support method.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"50 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144153885","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
Enhancing Li-storage ability of FeC2O4 anode enabled by oxygen-vacancy-enriched amorphous carbon microspheres compositing via hydrogen bonding interactions 富氧无定形碳微球通过氢键作用增强了FeC2O4阳极的储锂能力
IF 6.6 3区 材料科学
Electrochimica Acta Pub Date : 2025-05-28 DOI: 10.1016/j.electacta.2025.146567
Keqi Chen, Zengmou Li, Keyu Zhang, Rui Yan, Binbin Li, Yaochun Yao, Shaoze Zhang, Bin Yang
{"title":"Enhancing Li-storage ability of FeC2O4 anode enabled by oxygen-vacancy-enriched amorphous carbon microspheres compositing via hydrogen bonding interactions","authors":"Keqi Chen, Zengmou Li, Keyu Zhang, Rui Yan, Binbin Li, Yaochun Yao, Shaoze Zhang, Bin Yang","doi":"10.1016/j.electacta.2025.146567","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146567","url":null,"abstract":"Iron oxalate (α-FeC<sub>2</sub>O<sub>4</sub>), with a stable Li<sup>+</sup> diffusion pathway, exhibits excellent cycling stability but is limited in commercial applications due to its low electronic conductivity. To overcome this issure, we introduced an organic β-cyclodextrin (β-CD) compound with partial oxygen functional groups after thermal decomposition, to prepare an amorphous carbon microspheres (AMCs) composite. Considering the stable sustaining force supported by crystal water between FeC<sub>2</sub>O<sub>4</sub>·2H<sub>2</sub>O interlayer, a unique composite technology with α-FeC<sub>2</sub>O<sub>4</sub> and AMCs through the interactions of hydrogen bonds (FCO/AMCs) was proposed. By adjusting the solvent ratio, FCO/AMCs 1:3 with high concentration of oxygen vacancies and conductive network established by AMCs, exhibits excellent discharge specific capacity of 1183.78 mAh g<sup>-1</sup> at current density of 1 A g<sup>-1</sup> after 1000 cycles and stable cycling performance with the capacity retention rate of 72.8% even over 750 cycles at 5 A g<sup>-1</sup>. Based on the catalytic effect of oxygen vacancies and faster average Li<sup>+</sup> diffusion rate, FCO/AMCs 1:3 electrode also shows higher exchange current density (<em>j</em><sub>0</sub> = 2.35 × 10<sup>-3</sup> A cm<sup>-2</sup>) and apparent electron transfer rate constant (<em>k</em><sub>app</sub> = 1.02 cm s<sup>-1</sup>), leading higher reversibility. Additionally, an in-depth analysis of kinetic parameters Li-ion tendentious behavior differences in transformation reactions, reveals that more oxygen vacancies can promote the ionization of Fe<sup>0</sup>, releasing more spin-polarized electrons to form spin-polarized capacitance. This research provides a novel strategy on carbon compositing and offers more comprehensive understanding of the kinetic processes involved in the oxalate-based anode material.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"60 1","pages":"146567"},"PeriodicalIF":6.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165095","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
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信