Journal of Electroanalytical Chemistry最新文献_第6页

Preparation of nitrogen-doped porous carbon by pyrolysis of Zn-MOF for electrocatalysis of oxygen reduction reaction Zn-MOF热解制备氮掺杂多孔碳电催化氧还原反应

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-09-17 DOI: 10.1016/j.jelechem.2025.119485

Hongtao Li , Yan Hou , Ran Zhou , Qian Zou , Kang Zhang , Peizhi Li , Chen Wang , Xiaowu Yang

{"title":"Preparation of nitrogen-doped porous carbon by pyrolysis of Zn-MOF for electrocatalysis of oxygen reduction reaction","authors":"Hongtao Li , Yan Hou , Ran Zhou , Qian Zou , Kang Zhang , Peizhi Li , Chen Wang , Xiaowu Yang","doi":"10.1016/j.jelechem.2025.119485","DOIUrl":"10.1016/j.jelechem.2025.119485","url":null,"abstract":"<div><div>The development of cost-effective, high-performance oxygen reduction reaction (ORR) electrocatalysts remains a critical challenge for advancing energy conversion technologies, particularly in fuel cells and metal-air batteries. Herein, Nitrogen-doped porous carbon (N-PC), synthesized through a facile and scalable pyrolysis strategy using oxygen-rich and nitrogen-containing zinc-based metal-organic frameworks (MOFs) as precursors, emerges as a highly efficient metal-free catalyst for the oxygen reduction reaction (ORR). Electrochemical characterization reveals that the optimized N-PC catalyst exhibits outstanding catalytic activity, with a half-wave potential of 0.89 V and a limiting current density of −5.61 mA cm<sup>−2</sup> in alkaline electrolyte. The material also demonstrates excellent long-term stability and methanol resistance, showing superior performance compared to commercial Pt/C in both alkaline and acidic conditions. Systematic analysis demonstrates that the improved ORR activity can be attributed to the synergistic effects of hierarchical porosity and nitrogen doping. The three-dimensional porous network enhances mass transfer efficiency, while the optimized nitrogen species distribution increases active site density and improves oxygen adsorption characteristics. This work not only provides a promising approach for designing universal ORR electrocatalysts but also offers fundamental insights into the development of sustainable energy conversion systems.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"997 ","pages":"Article 119485"},"PeriodicalIF":4.1,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119140","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}

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Corrigendum to “Biomass nanoarchitectonics on one-step synthesis of citrate-based capacitive carbon from ryegrass straw” [J. Electroanal. Chem. 996 (2025) 119428] “生物质纳米结构在黑麦草秸秆一步合成柠檬酸盐基电容碳中的应用”[J]。Electroanal。化学。996 (2025)119428]

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-09-17 DOI: 10.1016/j.jelechem.2025.119479

Gang Liu , Aoyang Zhang , Shams Forruque Ahmed , Xiaoming Guo , Weiwu Ma

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Mesoporous Si infiltrated with Ga and encapsulated with carbon improves the anode performance of lithium ion batteries 介孔硅中渗透镓并包覆碳，提高了锂离子电池的负极性能

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-09-16 DOI: 10.1016/j.jelechem.2025.119471

Zhipeng Li , Zhengjian Gu , Zhuoqi Gong , Yao Zhang

{"title":"Mesoporous Si infiltrated with Ga and encapsulated with carbon improves the anode performance of lithium ion batteries","authors":"Zhipeng Li , Zhengjian Gu , Zhuoqi Gong , Yao Zhang","doi":"10.1016/j.jelechem.2025.119471","DOIUrl":"10.1016/j.jelechem.2025.119471","url":null,"abstract":"<div><div>Silicon (Si) has become a promising anode for next-generation lithium-ion batteries due to its high theoretical specific capacity (4200 mA h g<sup>−1</sup>). However, large volume changes and fragility during cycling lithiation-delithiation have resulted in severe capacity degradation. To depress the drastically volumetric change of silicon and boost the cycling charge-discharge performance, we synthesized Ga@pSi@C composite anode by means of magnesiothermic reduction on aerogel silica, encapsulation with dopamine, infiltration with liquid metal gallium, and carbonization. On the one hand, gallium serves as a self-healing component as well as a good conductive material. On the other hand, the carbon shell acts as a mechanical constraint and support. Using this strategy, the synthesized Ga@pSi@C composite anode can effectively suppress the fragmentation of silicon particles during cycles. As a result, the initial discharging capacity of Ga@pSi@C anode delivers a capacity of 2113 mA h g<sup>−1</sup> at the first cycle with initial Coulombic efficiency (CE) of 75.3 %, which can retain a capacity of 1262 mA h g<sup>−1</sup> after 100 cycles. A reversible capacity of 834 mA h g<sup>−1</sup> can be maintained after 300 cycles at a current density of 2000 mA g<sup>−1</sup>. The infiltration-encapsulation strategy may provide new idea for improving the performance of anode materials besides porous silicon.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"997 ","pages":"Article 119471"},"PeriodicalIF":4.1,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096452","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}

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Impact of Vanadium ions on the supercapacitive properties of SnO2 nanoparticles 钒离子对SnO2纳米颗粒超电容性能的影响

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-09-16 DOI: 10.1016/j.jelechem.2025.119415

Ana Varadi , Ion Nesterovschi , Ameen Uddin Ammar , Dana Toloman , Maria Stefan , Cristian Leostean , Sergiu Macavei , Lucian Barbu Tudoran , Feray Bakan Misirlioglu , Marin Senila , Emre Erdem , Arpad Mihai Rostas , Adriana Popa

{"title":"Impact of Vanadium ions on the supercapacitive properties of SnO2 nanoparticles","authors":"Ana Varadi , Ion Nesterovschi , Ameen Uddin Ammar , Dana Toloman , Maria Stefan , Cristian Leostean , Sergiu Macavei , Lucian Barbu Tudoran , Feray Bakan Misirlioglu , Marin Senila , Emre Erdem , Arpad Mihai Rostas , Adriana Popa","doi":"10.1016/j.jelechem.2025.119415","DOIUrl":"10.1016/j.jelechem.2025.119415","url":null,"abstract":"<div><div>Tin oxide SnO<sub>2</sub>, due to its high chemical stability and exceptional electrical properties, is a promising candidate for electrode materials in energy storage applications. In this study, a series of V-doped SnO<sub>2</sub> nanoparticles were synthesized and tested as electrode materials for supercapacitor applications. This study highlights the influence of dopant ions on the electrochemical properties of SnO<sub>2</sub> by varying the dopant V-ion concentrations (0, 0.3%, 0.5%, and 0.7%). Several advanced characterization methods were used to evidence the successful incorporation of the V ions in the SnO<sub>2</sub> lattice, such as X-ray diffraction, Raman Spectroscopy, X-ray photoelectron spectroscopy and electron paramagnetic resonance spectroscopy. The presence of multivalent V ions in SnO<sub>2</sub> was also evidenced. The SEM/TEM images reveal a polyhedral morphology of the nanoparticles. The presence of oxygen vacancies and their evolution with the V doping degree were highlighted. Symmetric supercapacitor devices were assembled to evaluate the electrochemical response of the undoped and V-doped SnO<sub>2</sub> materials. The sample with 0.5% V-ions exhibits the highest specific capacitance value of 162.43 F/g at a 2 mV/s scan rate, an energy density of 22.59 Wh/kg, and a power density of 1626 W/kg. This suggests that adding V ions to SnO<sub>2</sub>, even in small amounts, improves the electrochemical performance of the material. The best performing sample shows excellent cyclic stability of about 99% retention after 2000 cycles. These electrochemical performances exceed those of most prior reported SnO<sub>2</sub> supercapacitors, sustaining the significant potential of V-doped SnO<sub>2</sub> nanoparticles for energy storage applications.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"997 ","pages":"Article 119415"},"PeriodicalIF":4.1,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096450","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}

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Effect of V2+ and V4+-doping on the performance of MoS2 catalysts for H2 generation in microbial electrolytic cells V2+和V4+掺杂对微生物电解池中MoS2催化剂产氢性能的影响

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-09-16 DOI: 10.1016/j.jelechem.2025.119480

Peifen Wang , Danyang Liu , Xiaowei An , Xuli Ma , Xiao Du , Xiaogang Hao , Abuliti Abudula , Guoqing Guan

{"title":"Effect of V2+ and V4+-doping on the performance of MoS2 catalysts for H2 generation in microbial electrolytic cells","authors":"Peifen Wang , Danyang Liu , Xiaowei An , Xuli Ma , Xiao Du , Xiaogang Hao , Abuliti Abudula , Guoqing Guan","doi":"10.1016/j.jelechem.2025.119480","DOIUrl":"10.1016/j.jelechem.2025.119480","url":null,"abstract":"<div><div>In this study, a series of vanadium-doped MoS<sub>2</sub> (V-MoS<sub>2</sub>) powders synthesized via a hydrothermal method were coated on nickel foam (NF) as the cathode in microbial electrolysis cells (MECs). It is verified that the doped V was incorporated into the MoS<sub>2</sub> lattice with the state of V<sup>2+</sup> and V<sup>4+</sup>, and especially V<sup>2+</sup> bonded with edge the sulfur atom while V<sup>4+</sup> replaced the Mo<sup>4+</sup> and embedded in the crystal lattice of Mo<img>S. Meanwhile, the doping ratio of V<sup>2+</sup>/V<sup>4+</sup> decreased with the increase in the doping content of V, revealing that the V<sup>4+</sup> is more beneficial for the efficiency of V-doping. Electrochemical testing demonstrated that the optimal doping amount of 10 % V significantly enhanced the electrochemical activity of MoS<sub>2</sub> by the activating of the inert basal plane. In the MEC system, the 10 % V-MoS<sub>2</sub> based electrode achieved a peak current density of 84.3 mA cm<sup>−2</sup> with a hydrogen production rate of 289 L H₂ L<sup>−1</sup> cycle<sup>−1</sup>, a coulombic efficiency of 80.61 % and a cathodic hydrogen conversion efficiency of 44.84 %, which is much better than many conventional MEC catalysts, demonstrating a great potential for green hydrogen production.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"997 ","pages":"Article 119480"},"PeriodicalIF":4.1,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096552","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}

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Novel MOF-derived bimetallic selenide heterojunction CoSe2/MnSe@NC enhancing lithium-ion anode storage performance 新型mof衍生的双金属硒化物异质结CoSe2/MnSe@NC增强锂离子阳极存储性能

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-09-16 DOI: 10.1016/j.jelechem.2025.119482

Jiahui Li , Qinyuan Yu , Luyao Shi, Xuedong Wei

{"title":"Novel MOF-derived bimetallic selenide heterojunction CoSe2/MnSe@NC enhancing lithium-ion anode storage performance","authors":"Jiahui Li , Qinyuan Yu , Luyao Shi, Xuedong Wei","doi":"10.1016/j.jelechem.2025.119482","DOIUrl":"10.1016/j.jelechem.2025.119482","url":null,"abstract":"<div><div>Transition metal selenides are considered promising anode materials due to their low production costs and high theoretical specific capacity. However, poor conductivity and volume expansion issues lead to decreased cycling stability. Herein, the nitrogen-doped carbon-coated CoSe<sub>2</sub>/MnSe heterostructure (CoSe<sub>2</sub>/MnSe@NC) as anode was synthesized through room-temperature static preparation of CoMn-BTC precursor and subsequent selenization step. In this CoSe<sub>2</sub>/MnSe@NC composite, the nitrogen-doped carbon layer is intimately encapsulated around the exterior of the CoSe<sub>2</sub>/MnSe heterostructure, which is beneficial for preserving structural integrity while accommodating volume variations during electrochemical cycling. Furthermore, the formation of the heterostructure facilitates improved ion and electron transfer, which subsequently expedites the kinetics of electrochemical reactions occurring during the lithium insertion/extraction phases. Consequently, owing to the collaborative interaction between CoSe<sub>2</sub>/MnSe and the nitrogen-enriched carbon layer, the CoSe<sub>2</sub>/MnSe@NC demonstrates a first-cycle discharge/charge capacity (788.9 mAh g<sup>−1</sup>/582.3 mAh g<sup>−1</sup>), substantial reversible capacity (651.2 mAh g<sup>−1</sup> at 100 mA g<sup>−1</sup> after 100 cycles) and excellent electrochemical stability (almost no attenuation after 500 cycles at 1000 mA g<sup>−1</sup>).</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"997 ","pages":"Article 119482"},"PeriodicalIF":4.1,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096551","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}

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Copper-based bimetallic synergistic catalysis: Structural regulation to enhance nitrate reduction activity 铜基双金属协同催化：提高硝酸还原活性的结构调控

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-09-12 DOI: 10.1016/j.jelechem.2025.119475

Jinbao Du, Feng Shi, Honglin Xu, Sen Xu, Kaichen Wang, Jinguo Wang

{"title":"Copper-based bimetallic synergistic catalysis: Structural regulation to enhance nitrate reduction activity","authors":"Jinbao Du, Feng Shi, Honglin Xu, Sen Xu, Kaichen Wang, Jinguo Wang","doi":"10.1016/j.jelechem.2025.119475","DOIUrl":"10.1016/j.jelechem.2025.119475","url":null,"abstract":"<div><div>Nitrate electrocatalytic reduction technology holds considerable promise in the fields of wastewater denitrification and the green synthesis of high-value chemicals. However, achieving efficient and highly selective nitrate reduction remains a significant challenge. Traditional single-metal catalysts face limitations in improving catalytic efficiency, regulating product selectivity, and flexibly modulating reaction pathways. In this context, copper-based bimetallic catalysts offer a promising strategy for enhancing nitrate reduction performance due to their tunable structures and interfacial synergistic effects. This article presents a systematic review of recent advances and application prospects of copper-based bimetallic catalysts in electrocatalytic nitrate reduction. First, a comprehensive analysis of the reaction mechanism is conducted, encompassing the multi-electron transfer process, formation pathways of key intermediates, and the competition between direct and indirect reduction pathways. Second, the design principles, synthesis methods, and mechanisms underlying performance optimization are discussed. Particular emphasis is placed on how bimetallic synergy can enhance faraday efficiency, product selectivity, and reaction kinetics while effectively suppressing side reactions. Research findings indicate that copper-based bimetallic catalysts demonstrate notable advantages in terms of catalytic activity, selectivity, cost-effectiveness, stability, and environmental adaptability. Finally, current challenges in the field are summarized, and potential directions for future research are proposed. This review aims to provide a theoretical foundation and practical guidance for the development of high-performance copper-based bimetallic catalysts and to promote their practical implementation in wastewater treatment and sustainable chemical synthesis.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"997 ","pages":"Article 119475"},"PeriodicalIF":4.1,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096548","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}

引用次数: 0

Uric acid detection with a sustainable electrochemical paper-based analytical device manufactured with polyvinyl alcohol-graphite conductive ink 用聚乙烯醇-石墨导电油墨制造的可持续电化学纸基分析装置检测尿酸

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-09-11 DOI: 10.1016/j.jelechem.2025.119476

Héctor David Hernández , Rocio B. Dominguez , Juan Manuel Gutiérrez

{"title":"Uric acid detection with a sustainable electrochemical paper-based analytical device manufactured with polyvinyl alcohol-graphite conductive ink","authors":"Héctor David Hernández , Rocio B. Dominguez , Juan Manuel Gutiérrez","doi":"10.1016/j.jelechem.2025.119476","DOIUrl":"10.1016/j.jelechem.2025.119476","url":null,"abstract":"<div><div>The use of sustainable materials for analytical systems development has gained great interest due to growing environmental concerns. This work presents an electrochemical paper-based analytical device (ePAD) fabricated by airbrushing a conductive ink composed of polyvinyl alcohol (PVA) and graphite onto paper substrates. To provide a hydrophobic barrier that confines the electrolyte, the paper substrates were treated with beeswax. Then, the resulting ePADs were activated with KOH using cyclic voltammetry. To evaluate the applicability of the fabricated ePADs, uric acid (UA) was selected as target analyte due to its relevance as biomarker for chronic degenerative diseases. The ePADs exhibited a linear detection range from 100 μM to 1000 μM, a sensitivity of 1.3503 nA/μM ± 0.0137 nA/μM and a limit of detection (LOD) of 19.9764 μM ± 0.2679 μM. All measurements were performed in quadruplicate to ensure repeatability of the methodology. The results highlight the suitability of ePADs for the development and implementation of adaptable and environmentally responsible analytical platforms with potential point-of-care (PoC) applications.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"997 ","pages":"Article 119476"},"PeriodicalIF":4.1,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145046937","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}

引用次数: 0

Choline-based ionic liquid electrolyte additives for suppression of dendrite growth in Zn-ion batteries 抑制锌离子电池枝晶生长的胆碱基离子液体电解质添加剂

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-09-10 DOI: 10.1016/j.jelechem.2025.119474

Nikola Zdolšek , Grgur Mihalinec , Floren Radovanović-Perić , Dajana Mikić , Aleksandra Dimitrijević , Marijana Kraljić Roković

{"title":"Choline-based ionic liquid electrolyte additives for suppression of dendrite growth in Zn-ion batteries","authors":"Nikola Zdolšek , Grgur Mihalinec , Floren Radovanović-Perić , Dajana Mikić , Aleksandra Dimitrijević , Marijana Kraljić Roković","doi":"10.1016/j.jelechem.2025.119474","DOIUrl":"10.1016/j.jelechem.2025.119474","url":null,"abstract":"<div><div>Zinc-ion batteries are a promising solution for energy storage due to their high energy density, safety and cost efficiency. However, the formation of dendrites on zinc anodes is the main problem in the development of Zn-ion batteries and poses a major challenge as it can lead to short circuits and capacity degradation. In this study, the use of choline-based ionic liquids as electrolyte additives to inhibit dendrite growth in Zn-ion batteries is investigated. Choline-based ionic liquids, including choline salicylate, choline saccharinate, choline acetate and choline lactate, were introduced into an aqueous ZnSO<sub>4</sub> electrolyte to improve the uniformity and stability of zinc electrodeposition. Electrochemical analysis combined with surface characterization of the electrodes, demonstrated that these additives effectively modulate nucleation and deposition processes. Among the ionic liquids tested, choline saccharinate exhibited the most stable cycling performance and the best dendrite suppression, while choline salicylate exhibited rapid dendrite growth. The use of choline saccharinate as an additive in Zn-ion batteries was demonstrated in a Zn//V<sub>2</sub>O<sub>5</sub>@rGO cell. The battery showed high performance with a specific capacity of 91 mAh g<sup>−1</sup> at 0.6 A g<sup>−1</sup>. The findings highlight the potential of environmentally friendly choline-based ionic liquids as next-generation electrolyte additives for advanced Zn-ion battery systems.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"997 ","pages":"Article 119474"},"PeriodicalIF":4.1,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145046525","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}

引用次数: 0

Pseudocapacitive performance enhancement of nickel ferrite enabled by magnetic field-mediated microstructural control 磁场介导的微结构控制使镍铁氧体赝电容性能增强

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-09-10 DOI: 10.1016/j.jelechem.2025.119473

Hugang Cui , Yan Ma , Yulong Wang , Xiaoyan Yan , Kai Feng , Jianli Wang , Changping Yang

{"title":"Pseudocapacitive performance enhancement of nickel ferrite enabled by magnetic field-mediated microstructural control","authors":"Hugang Cui , Yan Ma , Yulong Wang , Xiaoyan Yan , Kai Feng , Jianli Wang , Changping Yang","doi":"10.1016/j.jelechem.2025.119473","DOIUrl":"10.1016/j.jelechem.2025.119473","url":null,"abstract":"<div><div>NiFe<sub>2</sub>O<sub>4</sub> is a promising pseudocapacitive material owing to its multi-electron redox activity and chemical stability, yet its application is constrained by low conductivity, limited surface area, and sluggish ion diffusion. Here, we report a uniform magnetic-field-assisted hydrothermal strategy to optimize the microstructure and electrochemical performance of NiFe₂O₄. Unlike recent approaches such as carbon compositing, transition-metal doping, and template-assisted synthesis, which often involve complex procedures or high costs, our method provides a simple, scalable, and cost-effective pathway. By tuning the field strength, we reveal that a moderate field (1000 Gs) directs the assembly of ultrathin nanosheets into radially aligned “dandelion-like” microspheres while simultaneously enriching oxygen vacancies. This architecture enhances conductivity, accelerates ion diffusion, and increases redox-active sites. As a result, the NFO-1000 electrode achieves a specific capacitance of 295.8 F g<sup>−1</sup> at 1 A g<sup>−1</sup>, an energy density of 21.2 Wh kg<sup>−1</sup>, and 95 % capacitance retention after 1000 cycles-representing a 90 % improvement compared to the zero-field sample. This work establishes moderate uniform magnetic fields as an efficient handle for defect engineering and mesostructural alignment, opening a new route for next-generation spinel-oxide-based energy storage devices.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"997 ","pages":"Article 119473"},"PeriodicalIF":4.1,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096550","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}

引用次数: 0