Electrochimica Acta最新文献_第3页

High-Performing Zr4+/Ti4+ Co-doped SrFeO3 as Electrodes for Symmetrical Solid Oxide Fuel Cells 作为对称固体氧化物燃料电池电极的高性能 Zr4+/Ti4+ 共掺杂 SrFeO3

IF 6.6 3区材料科学

Electrochimica Acta Pub Date : 2024-12-16 DOI: 10.1016/j.electacta.2024.145507

Sunil Kumar, Darshilkumar N. Chhatrodiya, Shobit Omar

{"title":"High-Performing Zr4+/Ti4+ Co-doped SrFeO3 as Electrodes for Symmetrical Solid Oxide Fuel Cells","authors":"Sunil Kumar, Darshilkumar N. Chhatrodiya, Shobit Omar","doi":"10.1016/j.electacta.2024.145507","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145507","url":null,"abstract":"Bifunctional electrodes are critical for ensuring high performance and reliable operation in symmetrical solid oxide fuel cells (SSOFCs). This study introduces a novel Zr/Ti co-doping strategy in perovskite-structured SrFeO3-δ, which significantly enhances performance stability, establishing it as a strong candidate for symmetrical electrode applications. A series of SrFe1-xTix/2Zrx/2O3-δ (x = 0-0.2) compositions are synthesised via the conventional solid-state reaction method. The co-doped samples retain a cubic phase, albeit with considerable oxygen deficiency in air. The optimized composition, SrFe0.85Ti0.075Zr0.075O3-δ (SFTZ-0.15), demonstrates electrical conductivities of 68.5 S.cm-1 in air and 3.6 S.cm-1 in 3% H2O/H2 at 800°C. Under extreme reducing conditions, the brownmillerite phase and Fe particle exsolution occur. The area-specific resistance (ASR) offered by the SFTZ-0.15 electrode at 800°C is 0.046 Ω.cm2 in air and 0.064 Ω.cm2 in moist H₂. While stable in air, the ASR rises to 0.132 Ω.cm2 after 100 h exposure in reducing conditions. Electrolyte-supported symmetrical single-cells with SFTZ-0.15 electrodes deliver a maximum power density of 732 mW.cm-2 at 800°C, retaining 91.5% of their performance after 100 h of continuous operation at 1.2 A·cm-2. These findings highlight the synergistic benefits of Zr4+/Ti4+ co-doping in SrFeO3-δ, showcasing its potential as a bifunctional electrode for SSOFCs.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"6 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825445","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

Synthesis and electrochemical performance of 2D molybdenum carbide (MXene) for supercapacitor applications

IF 6.6 3区材料科学

Electrochimica Acta Pub Date : 2024-12-16 DOI: 10.1016/j.electacta.2024.145508

Saira Anwar, Muhammad Rafique, Muneeb Irshad, M. Isa Khan, SSA Gillani, M. Shakil, Muhammad Asif Nawaz, Sarmad Masood Shaheen, Mohammad A. Assiri

{"title":"Synthesis and electrochemical performance of 2D molybdenum carbide (MXene) for supercapacitor applications","authors":"Saira Anwar, Muhammad Rafique, Muneeb Irshad, M. Isa Khan, SSA Gillani, M. Shakil, Muhammad Asif Nawaz, Sarmad Masood Shaheen, Mohammad A. Assiri","doi":"10.1016/j.electacta.2024.145508","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145508","url":null,"abstract":"In the field of supercapacitors, carbide MXenes have recently received significant attention as pseudocapacitive electrode materials due to their unique multilayered structure, high metallic conductivity, pseudocapacitive charge storage mechanism and tunable surface terminations. Herein, synthesis and electrochemical performance of 2D molybdenum carbide (Mo2C) MXene-based electrode is presented for supercapacitor applications. Mo2C MXene was synthesized by using simple solid-state thermal reduction technique. The crystalline structure, surface morphologies, specific capacitance, electronic conductivity and reaction kinetics of as-synthesized Mo2C MXene were examined using XRD (X-ray diffraction) analysis, FESEM (field emission scanning electron microscopy), CV (cyclic voltammetry) and EIS (electrochemical impedance spectroscopy) measurements, respectively. The hexagonal phase (with P63/mmc symmetry) of Mo2C MXene was confirmed by XRD analysis. The 2D multilayered structure was displayed by FESEM results. The cyclic voltammograms revealed an efficient electrochemical performance of 2D Mo2C MXene. Due to its high current density, large surface area and abundance of redox acive sites, MXene-based electrode displayed high specific capacitance of 916 F/g at 5 mV/s. Further, excellent electronic conductivity and minimum charge transfer resistance was observed by EIS plots. The significant electrochemical performance of Mo2C MXene-based electrode governs its implementation for developing highly efficient supercapacitors with high energy and power densities.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"77 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825649","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

Zn/Mg Metal-Organic Framework Composite for Energy Storage via Cobalt Phthalocyanine Dye in a Self-powered Photosupercapacitor

IF 6.6 3区材料科学

Electrochimica Acta Pub Date : 2024-12-16 DOI: 10.1016/j.electacta.2024.145526

Ishita Naskar, Akshay Kumar Ray, Marina Freitag, Melepurath Deepa

{"title":"Zn/Mg Metal-Organic Framework Composite for Energy Storage via Cobalt Phthalocyanine Dye in a Self-powered Photosupercapacitor","authors":"Ishita Naskar, Akshay Kumar Ray, Marina Freitag, Melepurath Deepa","doi":"10.1016/j.electacta.2024.145526","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145526","url":null,"abstract":"This work presents a photosupercapacitor (PSC) integrating a co-sensitized TiO2/CdS/CoPc photoanode for efficient solar energy harvesting with a high-performance Zn/Mg metal-organic framework (MOF-5/NICS-6) composite cathode for charge storage. The PSC exhibits fast photo-charging to ∼0.7 V within seconds under illumination and delivers a high discharge specific capacity (SC) of ∼235 C g−1 at 1 A g−1 in the dark. The MOF-5/NICS-6 composite, when evaluated independently as an asymmetric supercapacitor (ASC) cathode, achieves a remarkable SC of 258.3 C g−1 at 1 A g−1, energy and power densities up to 25 Wh kg−1 and 4.5 kW kg−1, and excellent cycling stability over 6000 cycles with 80% retention. The inadequate light-harvesting capabilities of conventional photoanodes and poorly electrocatalytic counter electrodes limit the production and separation of photogenerated holes and electrons. Use of a photoanode co-sensitized with CoPc and CdS enables broad spectral utilization and reduces recombination losses. Simultaneously, the MOF composite cathode allows efficient reduction of sulfide species maximizing charge separation in the solar part and stores charge efficiently in the supercapacitor part resulting in an overall photo-conversion and storage efficiency of 11.4%. The PSC retains 68% of its initial capacity after 100 photo-charging/discharging cycles, highlighting the robustness and stability of the rationally designed cell.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"23 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825446","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

Electrode-level Water Management Strategies for Anion Exchange Membrane Fuel Cells

IF 6.6 3区材料科学

Electrochimica Acta Pub Date : 2024-12-16 DOI: 10.1016/j.electacta.2024.145538

Yingdan Cui, Rik van Gorp, Tarso Bastos, Mohammad Al Murisi, Noor Ul Hassan, Saheed Lateef, Yeju Jang, John R. Varcoe, Minhua Shao, Antoni Forner-Cuenca, William E. Mustain

{"title":"Electrode-level Water Management Strategies for Anion Exchange Membrane Fuel Cells","authors":"Yingdan Cui, Rik van Gorp, Tarso Bastos, Mohammad Al Murisi, Noor Ul Hassan, Saheed Lateef, Yeju Jang, John R. Varcoe, Minhua Shao, Antoni Forner-Cuenca, William E. Mustain","doi":"10.1016/j.electacta.2024.145538","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145538","url":null,"abstract":"Anion exchange membrane fuel cells (AEMFCs) have emerged as a promising alternative to commercialized proton exchange membrane fuel cells because they can enable much lower costs by using cheaper materials, especially non-precious metal electrocatalysts. However, the commercialization of AEMFCs faces several technical challenges, including water management during operation. More specifically, achieving high power density typically requires AEMFCs to be operated with anode/cathode reacting gas dew points much lower than the cell operating temperature to prevent flooding. Conversely, achieving long lifetime typically requires reacting gases with high relative humidities to be supplied to the cell. A solution is needed that can allow for high power density to be achieved under states of high hydration – i.e., high reacting gas dew points, even at lower operating temperatures (e.g., 60°C). This work explores multiple electrode-level water management strategies for AEMFCs with the goal of enabling high power operation at high states of hydration, including: i) hydrophobic catalyst layers by adding PTFE; ii) hydrophilic catalyst layers by adding Nafion®; iii) gas diffusion layers (GDLs) with patterned wettability; and iv) combinations thereof. Compared to hydrophobic electrodes suffering serious flooding at high hydration states, the promising result of this work is one of the highest reported peak power densities reported to date, 1.5 W cm-2, under H2/O2 flow with hydrophilic-hydrophobic hybrid electrodes, even with anode and cathode dew points of 59 °C and 62 °C, respectively. It is expected that these electrode-level water management strategies can contribute to the commercialization of AEMFCs in the near future.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"47 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825650","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

Optimizing Bimetallic NiRu@Ti3C2Tx Catalysts for Oxygen Evolution: The Impact of MXene Content on Ru Stability

IF 6.6 3区材料科学

Electrochimica Acta Pub Date : 2024-12-16 DOI: 10.1016/j.electacta.2024.145529

Merve Buldu-Akturk, Thorsten Schultz, Namrata Sharma, Ursula Michalczik, Peter Bogdanoff, Norbert Koch, Michelle P. Browne

引用次数: 0

Electrochemical synthesis of isothiocyanogen and its reactivity in thiocyanation reactions

IF 6.6 3区材料科学

Electrochimica Acta Pub Date : 2024-12-16 DOI: 10.1016/j.electacta.2024.145517

Yuriy N. Kozyrev, Andrey S. Mendkovich, Vladimir A. Kokorekin, Victor B. Luzhkov, Alexander I. Rusakov

引用次数: 0

Effect of innovative carbon additives in the positive active mass of absorbent glass mat lead acid battery

IF 6.6 3区材料科学

Electrochimica Acta Pub Date : 2024-12-16 DOI: 10.1016/j.electacta.2024.145537

Marco Cattelan, Giorgia Daniel, Marco Mazzucato, Daniele Fabris, Simone Crivellaro, Roberto Aliberti, Mattia Parnigotto, Silvia Cazzanti, Christian Durante

{"title":"Effect of innovative carbon additives in the positive active mass of absorbent glass mat lead acid battery","authors":"Marco Cattelan, Giorgia Daniel, Marco Mazzucato, Daniele Fabris, Simone Crivellaro, Roberto Aliberti, Mattia Parnigotto, Silvia Cazzanti, Christian Durante","doi":"10.1016/j.electacta.2024.145537","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145537","url":null,"abstract":"A well-known problem of lead acid batteries (LABs) is the limited charge efficiency and cyclability, due to the heavy electrode degradation during the discharging-charging process. Specifically, grid corrosion remains a detrimental issue to solve in flooded LAB. In this regard, it was observed that the addition of carbons in the positive active mass (PAM) of LABs improves the battery performances specifically the mechanical strength and the conductivity, which is beneficial for uniform current distribution during the charge-discharge process. In this paper, three different carbon-based compounds namely carbon black, carbon nanotubes, and graphitic carbon were selected as additives based on their physicochemical and electrochemical properties such as surface area, porosity, graphitization degree, conductivity, contact angle (wettability), and overpotential versus the hydrogen evolution reaction. Positive active masses at different carbon additive loadings (0.04 ÷ 0.4 % wtPbO) were tested in an absorbent glass mat (AGM) LAB 1+/2− prototype cell. The prepared cells were tested under a standard charge-discharge protocol and then water loss was evaluated by coupling electrochemical polarization and gas analysis in accumulation mode. Incorporating carbon additives results in a remarkable increase in grid corrosion resistance and oxygen recombination.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"30 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825448","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

Preparation of V4+electrolyte by nanofluid-based electrocatalytic reduction of V2O5 for vanadium redox flow batteries

IF 6.6 3区材料科学

Electrochimica Acta Pub Date : 2024-12-16 DOI: 10.1016/j.electacta.2024.145532

Nianben Zheng, Xuemei Qiu, Shengqian Jin, Zhangnan Xu, Mingyu Zhou, Zexin Zhou, Tian Zhou, Zhiqiang Sun

{"title":"Preparation of V4+electrolyte by nanofluid-based electrocatalytic reduction of V2O5 for vanadium redox flow batteries","authors":"Nianben Zheng, Xuemei Qiu, Shengqian Jin, Zhangnan Xu, Mingyu Zhou, Zexin Zhou, Tian Zhou, Zhiqiang Sun","doi":"10.1016/j.electacta.2024.145532","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145532","url":null,"abstract":"The electrolyte employed in the vanadium redox flow battery (VRFB) is typically produced on an industrial scale through a secure and contaminant-free electrolysis process. However, the electrolysis rate is relatively sluggish, leading to elevated energy consumption. Herein, we propose a cost-effective method for electrolytic production of V(IV) electrolytes with carboxyl-functionalized multi-walled carbon nanotubes (MWCNTs-COOH) as the electrocatalyst and explore their effects on the electrolysis process. The results indicate that adding MWCNTs-COOH nanoparticles enhances the reactive sites of the electrode, thus improving the electrochemical activity of the electrolyte. The 0.1 wt% nanoparticle demonstrates the optimal catalytic performance for reducing V(V) to V(IV). Compared to the traditional electrolysis method, the proposed approach exhibits a 6.67% increase in electrolysis rate, a 15.57% reduction in energy consumption, and a notable relief in electrode corrosion. Furthermore, cyclic charge/discharge experiments illustrate that the prepared nanofluidic electrolyte exhibits superior performance in terms of voltage efficiency, Coulombic efficiency, energy efficiency, and discharge capacity retention. This invention offers a novel concept for vanadium electrolyte preparation, which reduces energy consumption and cost and improves the system's energy efficiency, showing great promise for practical VRFB applications.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"253 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825647","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

Electro-Upcycling Polyethylene Glycol Aqueous Solutions in a Proton Exchange Membrane Electrolyser 质子交换膜电解槽中聚乙二醇水溶液的电循环利用

IF 6.6 3区材料科学

Electrochimica Acta Pub Date : 2024-12-15 DOI: 10.1016/j.electacta.2024.145524

Nicolas Grimaldos-Osorio, Essyllt Louarn, Chantal Lorentz, Fabrizio Sordello, Monica Passananti, Olivier Boyron, Manel Taam, Vincent Monteil, Jesús González-Cobos, Angel Caravaca, Philippe Vernoux

{"title":"Electro-Upcycling Polyethylene Glycol Aqueous Solutions in a Proton Exchange Membrane Electrolyser","authors":"Nicolas Grimaldos-Osorio, Essyllt Louarn, Chantal Lorentz, Fabrizio Sordello, Monica Passananti, Olivier Boyron, Manel Taam, Vincent Monteil, Jesús González-Cobos, Angel Caravaca, Philippe Vernoux","doi":"10.1016/j.electacta.2024.145524","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145524","url":null,"abstract":"This study addresses the electro-upcycling, at low temperature and neutral pH conditions, of aqueous solutions of polyethylene glycol (PEG). For this purpose, a Proton-Exchange Membrane (PEM) reactor with Pt/C-based electrodes has been used. The electrooxidation performances of ethylene glycol (EG) and PEG were evaluated for various concentrations in aqueous solutions, temperatures and PEG molecular weights (MW). PEG was successfully electro-oxidized from 0.4 V, reaching current densities above 100 mA cm-2 at 0.8 V and 80 °C using oligoethylene glycols up to 400 g mol-1. Size-exclusion chromatography and NMR analysis evidenced the possibility to cleave –C–O–C– bonds of heavy PEG (1000, 4000 g mol-1), proving the possibility of depolymerizing PEG and recovering the monomer at low cell voltages and low temperatures. The production and purity of hydrogen in the cathode compartment of the electrolyser was confirmed by mass spectrometry. These results may open new perspectives in the development of electro-upcycling of PEG in water effluents.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"35 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142823395","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 Stripping of CO2 from Potassium-based Salts to Facilitate Direct Air Capture 电化学剥离钾盐中的二氧化碳，促进直接空气捕获

IF 6.6 3区材料科学

Electrochimica Acta Pub Date : 2024-12-15 DOI: 10.1016/j.electacta.2024.145521

引用次数: 0