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The cation effect on halogen intercalation into graphite electrode in aqueous zinc dual-ion batteries 水溶液锌双离子电池中卤素嵌入石墨电极的阳离子效应
IF 5.6 3区 材料科学 Q1 ELECTROCHEMISTRY Pub Date : 2025-12-09 DOI: 10.1016/j.electacta.2025.147992
Zhe Wang , Yueyuan Xu , Shiguan Xu , Wei Sun , Hongyu Wang , Yuhao Huang
Halogen-graphite intercalation compounds (HGICs)-based positive electrodes have gathered significant attention within the aqueous zinc dual-ion battery (ADIZBs) domain. To achieve a stable anodic electrode process with a high capacity of ∼250 mAh g-1 (for [BrCl]-GICs 1.6∼2 V vs. Zn/Zn2+), the presence of both Br- and Cl- anions is essential for this step-wise intercalation mechanism. This makes ZnCl2-based water-in-salt electrolytes (WISEs) with bromide additives promising electrolyte systems. However, these bromides are generally regarded as source of Br-, while role of their accompanying cations remains poorly understood due to challenges in experimental analysis. In this work, three representative bromides (LiBr, NaBr, and KBr) were introduced separately as additives into ZnCl2-based WISEs for constructing AZDIBs. Through a combination of ex-situ/in-situ electrochemical analysis and computational simulations, we investigated the ion solvation behavior and the anion storage mechanism in graphite electrodes. Our results reveal that the incorporated cations significantly influence the reorganization of the solvation shell of Br- anions, which consequently affects key electrochemical properties, including mass transport/charge transfer resistance and the lattice structure of the resulting HGICs. This study highlights the critical role of interfacial solvation structure reorganization and offers atomic-level insights for the rational design of electrolytes for high-performance AZDIBs.
卤素石墨嵌层化合物(hgic)基正极在水锌双离子电池(adizb)领域引起了广泛的关注。为了实现具有~ 250 mAh g-1高容量的稳定阳极电极工艺(对于[BrCl]- gics 1.6 ~ 2 V vs. Zn/Zn2+), Br-和Cl-阴离子的存在对于这种逐步插入机制至关重要。这使得以zncl2为基础的盐中水电解质(WISEs)与溴化物添加剂成为很有前途的电解质体系。然而,这些溴化物通常被认为是Br-的来源,而由于实验分析的挑战,它们的伴随阳离子的作用仍然知之甚少。在这项工作中,三种具有代表性的溴化物(LiBr, NaBr和KBr)分别作为添加剂添加到zncl2基WISEs中,用于构建azdib。通过非原位/原位电化学分析和计算模拟相结合的方法,研究了石墨电极中离子的溶剂化行为和阴离子的储存机制。我们的研究结果表明,掺入的阳离子显著影响了Br-阴离子的溶剂化壳的重组,从而影响了hgic的关键电化学性能,包括质量传输/电荷转移电阻和所得到的hgic的晶格结构。该研究强调了界面溶剂化结构重组的关键作用,并为高性能azdib电解质的合理设计提供了原子水平的见解。
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引用次数: 0
Predicting all-solid-state lithium-ion battery lifetime via state-of-charge imbalance-driven side reaction kinetics 利用电荷状态不平衡驱动的副反应动力学预测全固态锂离子电池寿命
IF 5.6 3区 材料科学 Q1 ELECTROCHEMISTRY Pub Date : 2025-12-09 DOI: 10.1016/j.electacta.2025.147998
Kazuki Furukawa , Masayuki Yamada , Kingo Ariyoshi
Rechargeable all-solid-state batteries (ASSBs) offer promising advantages in terms of safety, energy density, and long cycle lifetime. Although an understanding of capacity degradation is crucial for accurately predicting the lifetimes of rechargeable batteries, theoretical kinetic studies evaluating capacity fading in ASS lithium-ion batteries (LIBs) have been relatively limited. In contrast to liquid-electrolyte-based LIBs, in which the mechanism of capacify fading due to state-of-charge (SOC) imbalance is relatively well understood, these phenomena are only beginning to be systematically elucidated in ASS-LIBs. This study addressed this gap by investigating the fundamental relationship between the SOC imbalance and rate of side reactions in a Li[Li1/3Ti5/3]O4/LiCoO2 ASSB with a three-electrode cell configuration during repeated cycling at different temperatures. The obtained cumulative capacity plots facilitated quantification of the rates of side reactions at the electrodes using the side-reaction current (ISR), which exhibited Arrhenius-type temperature dependence. Capacity fading in the ASSB was determined to be governed by the SOC imbalance, and a theoretical model linking this imbalance to the ISR values at the electrodes was established accordingly. The resulting equation enabled the accurate prediction of battery lifetime based on ISR and indicated an excellent lifetime for the evaluated ASSB, even at elevated temperatures. Thus, this study not only revealed the capacity fading mechanism in the ASS-LIB but also demonstrated a new theoretical framework for predicting its long-term performance, contributing to the design of more durable and reliable ASSBs.
可充电全固态电池(assb)在安全性、能量密度和长循环寿命方面具有很好的优势。虽然对容量退化的理解对于准确预测可充电电池的寿命至关重要,但评估ASS锂离子电池(lib)容量退化的理论动力学研究相对有限。基于液体电解质的锂离子电池中,由于荷电状态(SOC)不平衡而导致的电容衰落机制相对较好理解,与此相反,这些现象在as -锂离子电池中才刚刚开始被系统地阐明。本研究通过研究具有三电极结构的Li[Li1/3Ti5/3]O4/LiCoO2 ASSB在不同温度下重复循环过程中SOC失衡与副反应速率之间的基本关系来解决这一问题。所得的累积容量图便于利用副反应电流(ISR)量化电极上的副反应速率,副反应电流表现出arrhenius型温度依赖性。确定ASSB中的容量衰落是由SOC不平衡控制的,并据此建立了将这种不平衡与电极处的ISR值联系起来的理论模型。所得方程能够基于ISR准确预测电池寿命,并表明即使在高温下,所评估的ASSB也具有出色的寿命。因此,本研究不仅揭示了自动驾驶汽车的容量衰减机制,而且为预测其长期性能提供了新的理论框架,有助于设计更耐用、更可靠的自动驾驶汽车。
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引用次数: 0
Effect of calcium acetate concentration in the electrolyte on the microstructure, anti-corrosion performance, and in vitro bioactivity of micro-arc oxidation coatings on NiTi 电解质中乙酸钙浓度对NiTi微弧氧化膜微观结构、防腐性能及体外生物活性的影响
IF 6.6 3区 材料科学 Q1 ELECTROCHEMISTRY Pub Date : 2025-12-09 DOI: 10.1016/j.electacta.2025.147982
Hong Chen, Long Jia, Shiqi Ren, Jianmin Hao
Nickel–titanium (NiTi) alloys are widely used as orthopedic implants because of their excellent shape memory effect; however, their inadequate corrosion resistance, nickel ion release, and limited bioactivity still hinder further clinical application. In this study, micro-arc oxidation (MAO) was employed to construct oxide coatings on NiTi alloy substrates, taking the concentration of calcium acetate in the electrolyte (0–3 g/L) as the key process variable. The effects of calcium acetate concentration on the coating microstructure, mechanical properties, corrosion resistance, and in vitro mineralization behavior were systematically investigated. The results demonstrate that changes in calcium acetate concentration markedly affect the discharge characteristics and film-forming quality, among which the coating prepared at 2 g/L (denoted as X2) exhibits the most favorable overall performance. Specifically, compared with the calcium-acetate-free control, the coating thickness of the X2 sample increases from 18.36 μm to 22.44 μm (a 22.2% increase), while the average pore size and surface porosity decrease by 29.8% and 26.6%, respectively, indicating a significantly improved coating compactness. This structural densification translates into superior mechanical performance and protective capability: the microhardness of the X2 sample reaches 370.2 HV (approximately 6.9% higher than that of the control), and the interfacial bonding strength increases to 20.34 N (an improvement of about 33.2%). Meanwhile, the corrosion resistance is substantially enhanced, as evidenced by a 53.8% reduction in corrosion current density to 5.96 × 10⁻⁸ A/cm² and an approximately 3.5-fold increase in polarization resistance. After immersion in Hanks’ solution for 14 days, the cumulative release of Ni ions from X2 is reduced by 44.4% compared with the control, with a concentration of only 20 μg/L. In addition, Ca incorporation promotes the in situ formation of a β-Ca₃(PO₄)₂ phase within the coating; in particular, the 2 g/L group can induce the formation of a continuous reticulated hydroxyapatite (HA) layer during in vitro immersion, exhibiting the best mineralization capability among all samples. These findings indicate that rational regulation of calcium acetate concentration enables the synergistic enhancement of mechanical stability, physical barrier function, and bioactivity of MAO coatings, thereby providing optimized process parameters for the surface modification of NiTi implants.
镍钛(NiTi)合金因其优异的形状记忆效应而广泛应用于骨科植入物;然而,它们的耐腐蚀性不足、镍离子释放和生物活性有限,仍然阻碍了其进一步的临床应用。本研究以电解液中乙酸钙浓度(0-3 g/L)为关键工艺变量,采用微弧氧化法(MAO)在NiTi合金基体上构建氧化膜。系统研究了乙酸钙浓度对涂层显微组织、力学性能、耐蚀性和体外矿化行为的影响。结果表明,醋酸钙浓度的变化对放电特性和成膜质量有显著影响,其中以2 g/L浓度制备的涂层(用X2表示)综合性能最好。其中,与无醋酸钙对照相比,X2样品的涂层厚度从18.36 μm增加到22.44 μm,增加了22.2%,平均孔径和表面孔隙率分别减小了29.8%和26.6%,涂层致密性显著提高。这种结构致密化转化为优异的力学性能和防护能力:X2样品的显微硬度达到370.2 HV(比对照提高约6.9%),界面结合强度提高到20.34 N(提高约33.2%)。同时,腐蚀电流密度降低53.8%至5.96 × 10⁻⁸a /cm²,极化电阻增加约3.5倍。在Hanks溶液中浸泡14天后,X2中Ni离子的累积释放量较对照减少44.4%,浓度仅为20 μg/L。此外,Ca的掺入促进了涂层内β-Ca₃(PO₄)₂相的原位形成;其中,2 g/L的羟基磷灰石在体外浸渍过程中可诱导形成连续网状的羟基磷灰石(HA)层,矿化能力最强。综上所述,合理调节醋酸钙浓度可以协同增强MAO涂层的机械稳定性、物理屏障功能和生物活性,从而为NiTi植入物的表面改性提供优化的工艺参数。
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引用次数: 0
Enhanced capacitive deionization performance for Pb2+ removal using layered composite MoS2/PPy loaded with nanoparticles 负载纳米颗粒的层状复合MoS2/PPy增强了去除Pb2+的电容性去离子性能
IF 5.6 3区 材料科学 Q1 ELECTROCHEMISTRY Pub Date : 2025-12-09 DOI: 10.1016/j.electacta.2025.147995
Zhuannian Liu, Yifei Wang, Xiaolei Shi, Benlong Wei, Pudi Yang, Jilun Hu
To address water scarcity and heavy metal pollution, capacitive deionization (CDI) has emerged as a key solution. This study developed a layered composite loaded with molybdenum disulfide/polypyrrole (MoS2/PPy) nanoparticles for efficient CDI removal of Pb2+ from water. MoS2 was synthesized via a hydrothermal method, followed by in-situ chemical polymerization to uniformly load PPy onto the surface and interlayers of MoS2, constructing a layered MoS2/PPy composite with nanoparticle-loading characteristics. The incorporation of PPy increases the interlayer spacing of MoS2 and enhances its specific surface area, providing ample intercalation space and active sites for Pb2+ adsorption. Electrochemical testing reveals that MoS2/PPy exhibits a specific capacitance of 101.7 F g−1 at a current density of 1 A g−1, demonstrating superior charge transfer and ion diffusion properties compared to pure MoS2. Second, under conditions of 1.2 V, initial Pb2+ concentration of 100 mg L−1, and pH=5, its CDI adsorption capacity reached 206.4 mg g−1. After 25 adsorption/desorption cycles, it retained 32.9 mg g−1 adsorption capacity and 53.5 % removal efficiency, demonstrating excellent regenerability and cycling stability. This provides practical guidance for efficiently treating Pb2+ contamination in real wastewater.
为了解决水资源短缺和重金属污染问题,电容去离子技术(CDI)已成为一个重要的解决方案。本研究开发了一种负载二硫化钼/聚吡咯(MoS2/PPy)纳米颗粒的层状复合材料,用于高效去除水中的Pb2+。采用水热合成法合成MoS2,然后通过原位化学聚合将PPy均匀加载到MoS2的表面和层间,构建了具有纳米颗粒加载特性的层状MoS2/PPy复合材料。PPy的掺入增加了MoS2的层间间距,提高了其比表面积,为Pb2+吸附提供了充足的插层空间和活性位点。电化学测试表明,MoS2/PPy在电流密度为1 a g−1时的比电容为101.7 F g−1,与纯MoS2相比,具有更好的电荷转移和离子扩散性能。其次,在1.2 V、初始Pb2+浓度为100 mg L−1、pH=5的条件下,其CDI吸附量达到206.4 mg g−1。经过25次吸附/解吸循环后,其吸附量为32.9 mg g−1,去除率为53.5%,具有良好的可再生性和循环稳定性。这对实际废水中Pb2+污染的有效处理具有实际指导意义。
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引用次数: 0
Pore structure engineering of self-breathing cathodes for enhanced in situ H2O2 production via the 2e- oxygen reduction pathway 通过2e-氧还原途径提高H2O2原位生成的自呼吸阴极孔隙结构工程
IF 5.6 3区 材料科学 Q1 ELECTROCHEMISTRY Pub Date : 2025-12-09 DOI: 10.1016/j.electacta.2025.147996
Xingwei Tao, Xia Qin, Xujie Lan, Hongyun Ren, Mai Wang, Xiao Guo, Shan Wang
Electrochemical in situ generation of hydrogen peroxide (H2O2) via the two-electron oxygen reduction reaction (2e- ORR) is a promising green H2O2 supply strategy. However, developing high-performance cathodes that enable efficient O2 utilization and H2O2 production remains a challenge. In this study, a self-breathing cathode was constructed by modifying graphite felt (GF) with carbon nanotubes (CNTs), serving as the electrode for in situ H2O2 production. The pore architecture and surface hydrophobicity were finely tuned by adjusting the CNTs dimensions and optimizing PTFE content, thus significantly enhancing O2 transport and 2e- ORR kinetics. The optimized CNT2-GF cathode achieved a H2O2 concentration of 781.55 mg·L-1 within 60 min and maintained stable H2O2 production over 10 reuse cycles. Moreover, the in situ generated H2O2, in synergy with Fe2+, effectively degraded phenol, rhodamine B, tetracycline, and sulfanilamide, demonstrating strong potential for wastewater treatment. This study provides a deeper understanding of the structure-performance relationship of porous cathodes and presents a practical strategy for optimizing in situ H2O2 generation in electro-Fenton systems.
通过双电子氧还原反应(2e- ORR)电化学原位生成过氧化氢(H2O2)是一种很有前途的绿色H2O2供应策略。然而,开发能够高效利用O2和生产H2O2的高性能阴极仍然是一个挑战。在这项研究中,用碳纳米管(CNTs)修饰石墨毡(GF)构建了一个自呼吸阴极,作为原位生产H2O2的电极。通过调整碳纳米管的尺寸和优化聚四氟乙烯(PTFE)的含量,可以很好地调节纳米管的孔隙结构和表面疏水性,从而显著提高O2的传输和2e- ORR动力学。优化后的CNT2-GF阴极在60 min内达到了781.55 mg·L-1的H2O2浓度,并且在10个重复使用周期内保持稳定的H2O2产量。此外,原位生成的H2O2与Fe2+协同作用,可有效降解苯酚、罗丹明B、四环素和磺胺,具有很强的废水处理潜力。该研究对多孔阴极的结构-性能关系有了更深入的了解,并提出了一种优化电fenton系统原位生成H2O2的实用策略。
{"title":"Pore structure engineering of self-breathing cathodes for enhanced in situ H2O2 production via the 2e- oxygen reduction pathway","authors":"Xingwei Tao,&nbsp;Xia Qin,&nbsp;Xujie Lan,&nbsp;Hongyun Ren,&nbsp;Mai Wang,&nbsp;Xiao Guo,&nbsp;Shan Wang","doi":"10.1016/j.electacta.2025.147996","DOIUrl":"10.1016/j.electacta.2025.147996","url":null,"abstract":"<div><div>Electrochemical in situ generation of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) via the two-electron oxygen reduction reaction (2e<sup>-</sup> ORR) is a promising green H<sub>2</sub>O<sub>2</sub> supply strategy. However, developing high-performance cathodes that enable efficient O<sub>2</sub> utilization and H<sub>2</sub>O<sub>2</sub> production remains a challenge. In this study, a self-breathing cathode was constructed by modifying graphite felt (GF) with carbon nanotubes (CNTs), serving as the electrode for in situ H<sub>2</sub>O<sub>2</sub> production. The pore architecture and surface hydrophobicity were finely tuned by adjusting the CNTs dimensions and optimizing PTFE content, thus significantly enhancing O<sub>2</sub> transport and 2e<sup>-</sup> ORR kinetics. The optimized CNT<sub>2</sub>-GF cathode achieved a H<sub>2</sub>O<sub>2</sub> concentration of 781.55 mg·L<sup>-1</sup> within 60 min and maintained stable H<sub>2</sub>O<sub>2</sub> production over 10 reuse cycles. Moreover, the in situ generated H<sub>2</sub>O<sub>2</sub>, in synergy with Fe<sup>2+</sup>, effectively degraded phenol, rhodamine B, tetracycline, and sulfanilamide, demonstrating strong potential for wastewater treatment. This study provides a deeper understanding of the structure-performance relationship of porous cathodes and presents a practical strategy for optimizing in situ H<sub>2</sub>O<sub>2</sub> generation in electro-Fenton systems.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"548 ","pages":"Article 147996"},"PeriodicalIF":5.6,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145704540","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
Characterisation of the growth of the oxide layer on wrought and LPBF 316L stainless steels by electrochemical impedance spectroscopy measurements 用电化学阻抗谱测量方法表征变形不锈钢和lpbf316l不锈钢氧化层的生长
IF 5.6 3区 材料科学 Q1 ELECTROCHEMISTRY Pub Date : 2025-12-09 DOI: 10.1016/j.electacta.2025.147991
Xavier Majnoni d'Intignano , Olivier Devos , Mohamed El May , Sébastien Mercier , Nicolas Saintier , Bernard Tribollet
Passive film formation of wrought and laser powder bed fusion (LPBF) 316L with different heat treatments was investigated. The passive films of the samples were formed after electrochemical passivation in a chloride acidic solution. The electrochemical passivation was monitored thanks to an original approach by electrochemical impedance spectroscopy (EIS). This electrochemical monitoring allows following the formation of the passive layer. Electrochemical results show significant differences between the wrought and LPBF 316L regarding the electrical properties of the metal/electrolyte interface.
研究了激光粉末床熔合316L在不同热处理条件下被动膜的形成。样品在氯化物酸性溶液中电化学钝化后形成钝化膜。电化学阻抗谱(EIS)是一种新颖的电化学钝化监测方法。这种电化学监测允许跟踪被动层的形成。电化学结果表明,变形后的lpbf316l与变形后的lpbf316l在金属/电解质界面的电学性能上存在显著差异。
{"title":"Characterisation of the growth of the oxide layer on wrought and LPBF 316L stainless steels by electrochemical impedance spectroscopy measurements","authors":"Xavier Majnoni d'Intignano ,&nbsp;Olivier Devos ,&nbsp;Mohamed El May ,&nbsp;Sébastien Mercier ,&nbsp;Nicolas Saintier ,&nbsp;Bernard Tribollet","doi":"10.1016/j.electacta.2025.147991","DOIUrl":"10.1016/j.electacta.2025.147991","url":null,"abstract":"<div><div>Passive film formation of wrought and laser powder bed fusion (LPBF) 316L with different heat treatments was investigated. The passive films of the samples were formed after electrochemical passivation in a chloride acidic solution. The electrochemical passivation was monitored thanks to an original approach by electrochemical impedance spectroscopy (EIS). This electrochemical monitoring allows following the formation of the passive layer. Electrochemical results show significant differences between the wrought and LPBF 316L regarding the electrical properties of the metal/electrolyte interface.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"549 ","pages":"Article 147991"},"PeriodicalIF":5.6,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145704040","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
PILs-E ionic liquids enable stable interfacial membranes for high performance and dendrite-free lithium metal batteries PILs-E离子液体为高性能和无枝晶锂金属电池提供稳定的界面膜
IF 5.6 3区 材料科学 Q1 ELECTROCHEMISTRY Pub Date : 2025-12-09 DOI: 10.1016/j.electacta.2025.147993
Xuhai Pan , Tianwei Huang , Zhixiang Chen , Yahong Liu , Hao Shen , Min Hua
With the growing demand for new energy sources, lithium batteries have attracted much attention due to their many excellent characteristics. However, lithium dendrite is an undesirable phenomenon in the cycling process of lithium-ion batteries, which can have a serious impact on battery safety and cycle life. The lithium dendrite problem is a pressing issue that hinders the development of lithium metal battery applications. In this work, a new binary electrolyte system, PILs-Es, was constructed using [BMP]TFSI ionic liquids intermixed with carbonate-based organic solvents. The optimal solvent ratios were selected by analyzing the ionic conductivity and viscosity studies. It is demonstrated that the PILs-E30-based half-cell exhibits excellent cycling stability and lower charge transfer impedance, which plays a positive role in the formation of a more homogeneous and dense solid electrolyte interfacial film (SEI film) on the surface of the anode. [BMP]TFSI is involved in the film-forming process, forming a more stable SEI film product, slowing down the decomposition of carbonate organic solvents, and inhibiting the occurrence of side reactions between the electrolyte and the electrode surface.PILs-E30 produces a more homogeneous deposition of lithium, which makes the generated SEI film more homogeneous and dense, and inhibits the generation of lithium dendrites, thus protecting the anode material. The LiFePO4|Graphite full cell based on PILs-E30 exhibits excellent electrochemical performance, with a discharge specific capacity of 117.5 mAh g-1, a high capacity retention of 95.0 %, and a Coulombic efficiency of close to 100 % after cycling for 200 cycles at 1 C multiplication rate. This proves the usefulness of PILs-E30 in full batteries.
随着人们对新能源需求的不断增长,锂电池因其诸多优异的特性而备受关注。然而,锂枝晶是锂离子电池循环过程中的不良现象,会对电池的安全性和循环寿命产生严重影响。锂枝晶问题是阻碍锂金属电池应用发展的一个紧迫问题。在这项工作中,用[BMP]TFSI离子液体与碳酸盐基有机溶剂混合构建了一种新的二元电解质体系PILs-Es。通过对离子电导率和粘度的分析,确定了最佳溶剂配比。结果表明,基于pils - e30的半电池具有良好的循环稳定性和较低的电荷转移阻抗,这对在阳极表面形成更均匀、致密的固体电解质界面膜(SEI膜)起着积极的作用。[BMP]TFSI参与成膜过程,形成更稳定的SEI膜产物,减缓碳酸盐有机溶剂的分解,抑制电解质与电极表面副反应的发生。PILs-E30使锂的沉积更加均匀,使生成的SEI膜更加均匀致密,抑制了锂枝晶的生成,从而保护了负极材料。基于PILs-E30的LiFePO4|石墨电池表现出优异的电化学性能,放电比容量为117.5 mAh g-1,容量保持率高达95.0%,在1c倍率下循环200次后库仑效率接近100%。这证明了PILs-E30在充满电的电池中的实用性。
{"title":"PILs-E ionic liquids enable stable interfacial membranes for high performance and dendrite-free lithium metal batteries","authors":"Xuhai Pan ,&nbsp;Tianwei Huang ,&nbsp;Zhixiang Chen ,&nbsp;Yahong Liu ,&nbsp;Hao Shen ,&nbsp;Min Hua","doi":"10.1016/j.electacta.2025.147993","DOIUrl":"10.1016/j.electacta.2025.147993","url":null,"abstract":"<div><div>With the growing demand for new energy sources, lithium batteries have attracted much attention due to their many excellent characteristics. However, lithium dendrite is an undesirable phenomenon in the cycling process of lithium-ion batteries, which can have a serious impact on battery safety and cycle life. The lithium dendrite problem is a pressing issue that hinders the development of lithium metal battery applications. In this work, a new binary electrolyte system, PILs-Es, was constructed using [BMP]TFSI ionic liquids intermixed with carbonate-based organic solvents. The optimal solvent ratios were selected by analyzing the ionic conductivity and viscosity studies. It is demonstrated that the PILs-E30-based half-cell exhibits excellent cycling stability and lower charge transfer impedance, which plays a positive role in the formation of a more homogeneous and dense solid electrolyte interfacial film (SEI film) on the surface of the anode. [BMP]TFSI is involved in the film-forming process, forming a more stable SEI film product, slowing down the decomposition of carbonate organic solvents, and inhibiting the occurrence of side reactions between the electrolyte and the electrode surface.PILs-E30 produces a more homogeneous deposition of lithium, which makes the generated SEI film more homogeneous and dense, and inhibits the generation of lithium dendrites, thus protecting the anode material. The LiFePO<sub>4</sub>|Graphite full cell based on PILs-E30 exhibits excellent electrochemical performance, with a discharge specific capacity of 117.5 mAh g<sup>-1</sup>, a high capacity retention of 95.0 %, and a Coulombic efficiency of close to 100 % after cycling for 200 cycles at 1 C multiplication rate. This proves the usefulness of PILs-E30 in full batteries.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"548 ","pages":"Article 147993"},"PeriodicalIF":5.6,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145704039","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
Unraveling the synergistic effect of CO2, Cl-, flow, temperature and pH on X65 steel corrosion in gas and liquid environments 揭示CO2、Cl-、流量、温度和pH对X65钢在气体和液体环境中的腐蚀的协同效应
IF 5.6 3区 材料科学 Q1 ELECTROCHEMISTRY Pub Date : 2025-12-08 DOI: 10.1016/j.electacta.2025.147981
Min Qin , Jialin Li , Xiyu Wang , Na Yang , Shijian Zhang , Guoxi He , Long Qin , Kexi Liao
Wet gas pipelines in oil and gas transportation are subjected to complex corrosive environments involving corrosive gases and multiphase flow. CO2 corrosion mechanisms differ fundamentally between environments, requiring dedicated study of gas environment pipeline top corrosion. This study systematically investigates the synergistic effects of CO2, Cl-, flow velocity, temperature, and pH on the corrosion of X65 steel in both environments. Through high-temperature, high-pressure reactor experiments combined with SEM, EDS, and XRD analysis, we reveal that the varying degrees of crystallization of FeCO3 at different temperatures and corrosion environments result in differences in the density of the corrosion product film, which further induces different degrees of localized corrosion. In the liquid environment, the synergistic action of Cl- penetration and fluid shear promotes localized corrosion, with a maximum rate of 4.16 mm/a. Notably, the maximum pit depth increases dramatically to 78.4852 μm. In contrast, the gas environment exhibits lower corrosion rates (up to 2.46 mm/a) and a maximum pit depth of 46.2978 μm (only 59 % of that in the liquid environment), attributed to denser and more crystalline FeCO3 films formed under condensate droplets.A key mechanistic insight is the identification of distinct corrosion-sensitive factors in each environment: CO2 partial pressure and Cl- concentration dominate in the liquid environment, whereas CO2 partial pressure and temperature are controlling in the gas environment. The synergistic corrosion effect of CO2 with temperature, pH, velocity and Cl- were explained. Ultimately, under the erosion of flowing and the infiltration of Cl-, combined with the evolution characteristics of corrosion product film, the synergistic corrosion behavior of CO2 and four factors was revealed.
油气输送中的湿式输气管道处于复杂的腐蚀环境中,涉及腐蚀性气体和多相流。二氧化碳和…
{"title":"Unraveling the synergistic effect of CO2, Cl-, flow, temperature and pH on X65 steel corrosion in gas and liquid environments","authors":"Min Qin ,&nbsp;Jialin Li ,&nbsp;Xiyu Wang ,&nbsp;Na Yang ,&nbsp;Shijian Zhang ,&nbsp;Guoxi He ,&nbsp;Long Qin ,&nbsp;Kexi Liao","doi":"10.1016/j.electacta.2025.147981","DOIUrl":"10.1016/j.electacta.2025.147981","url":null,"abstract":"<div><div>Wet gas pipelines in oil and gas transportation are subjected to complex corrosive environments involving corrosive gases and multiphase flow. CO<sub>2</sub> corrosion mechanisms differ fundamentally between environments, requiring dedicated study of gas environment pipeline top corrosion. This study systematically investigates the synergistic effects of CO<sub>2</sub>, Cl<sup>-</sup>, flow velocity, temperature, and pH on the corrosion of X65 steel in both environments. Through high-temperature, high-pressure reactor experiments combined with SEM, EDS, and XRD analysis, we reveal that the varying degrees of crystallization of FeCO<sub>3</sub> at different temperatures and corrosion environments result in differences in the density of the corrosion product film, which further induces different degrees of localized corrosion. In the liquid environment, the synergistic action of Cl<sup>-</sup> penetration and fluid shear promotes localized corrosion, with a maximum rate of 4.16 mm/a. Notably, the maximum pit depth increases dramatically to 78.4852 μm. In contrast, the gas environment exhibits lower corrosion rates (up to 2.46 mm/a) and a maximum pit depth of 46.2978 μm (only 59 % of that in the liquid environment), attributed to denser and more crystalline FeCO<sub>3</sub> films formed under condensate droplets.A key mechanistic insight is the identification of distinct corrosion-sensitive factors in each environment: CO<sub>2</sub> partial pressure and Cl<sup>-</sup> concentration dominate in the liquid environment, whereas CO<sub>2</sub> partial pressure and temperature are controlling in the gas environment. The synergistic corrosion effect of CO<sub>2</sub> with temperature, pH, velocity and Cl<sup>-</sup> were explained. Ultimately, under the erosion of flowing and the infiltration of Cl<sup>-</sup>, combined with the evolution characteristics of corrosion product film, the synergistic corrosion behavior of CO<sub>2</sub> and four factors was revealed.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"548 ","pages":"Article 147981"},"PeriodicalIF":5.6,"publicationDate":"2025-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145704545","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
Constructing 3D hierarchical MoS2 architectures via DMF intercalation: Vertically stacked nanosheets enable enhanced zinc-ion storage performance 通过DMF嵌入构建三维层次MoS2架构:垂直堆叠纳米片增强锌离子存储性能
IF 5.6 3区 材料科学 Q1 ELECTROCHEMISTRY Pub Date : 2025-12-08 DOI: 10.1016/j.electacta.2025.147980
Liteng Fan , Wan Wan , Weiyan Ma , Yaxuan Jin , Dejun Gong , Yuling Tu , Dong Sun , Wanyong Zhou , Hui Chai , Xiaogang Zhang
Molybdenum disulfide (MoS2) has emerged as a promising cathode material for aqueous zinc-ion batteries (AZIBs) due to its unique layered structure, high specific surface area, and cost-effectiveness. In this work, MoS2 was modified with N, N-dimethylformamide (DMF) to form a nanocomposite. The DMF intercalation successfully expanded the interlayer spacing of MoS2 from 0.62 nm to 0.99 nm. This expansion effectively reduces Coulombic interactions at the hydrated Zn2+/MoS2 interface, which promotes structural destabilization and facilitates accelerated zinc-ion diffusion. Consequently, the as-prepared MoS2-DMF cathode delivers a remarkable discharge specific capacity of 181.9 mAh g−1 at 0.1 A g−1 and demonstrates outstanding long-term cyclability with a capacity retention of 78.7% after 1000 cycles at a high current density of 5 A g−1. The strategy presented herein provides a valuable pathway for developing high-performance cathode materials for advanced AZIBs.
二硫化钼(MoS2)由于其独特的层状结构、高比表面积和成本效益而成为一种很有前途的水性锌离子电池(AZIBs)正极材料。在这项工作中,用N, N-二甲基甲酰胺(DMF)修饰二硫化钼形成纳米复合材料。DMF的插入成功地将MoS2的层间距从0.62 nm扩大到0.99 nm。这种膨胀有效地降低了水合Zn2+/MoS2界面上的库仑相互作用,促进了结构的不稳定,促进了锌离子的加速扩散。因此,制备的MoS2-DMF阴极在0.1 a g−1下具有181.9 mAh g−1的显著放电比容量,并且在5 a g−1的高电流密度下,在1000次循环后具有78.7%的长期可循环性。本文提出的策略为开发高性能azib正极材料提供了一条有价值的途径。
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引用次数: 0
Rapid synthesis of stable Cs2SnI6 double perovskite for visible-light DSSC–supercapacitor applications 用于可见光dssc超级电容器的稳定Cs2SnI6双钙钛矿的快速合成
IF 5.6 3区 材料科学 Q1 ELECTROCHEMISTRY Pub Date : 2025-12-08 DOI: 10.1016/j.electacta.2025.147975
Si Lin Choon , Hong Ngee Lim , Wan Nadhirah Wan Mohd Abd Kalam , Izwaharyanie Ibrahim , Chi Huey Ng , Choon Yian Haw , Augustin Catalin Mot , Lucian Cristian Pop
Rapid synthesis of Cs2SnI6 is established by reacting the pre-prepared CsI and SnI4 via a mechanochemical approach, in which the reaction is stably conducted in a facile condition for 12 min with the incorporation of hydroiodic acid (HI). The Rietveld refinement analysis reveals that the synthesized Cs2SnI6 exhibits stable crystallinity for over 4 months under ambient conditions with a relative humidity of more than 70%, showing no significant changes in its purity. When incorporated into dye-sensitized solar cells (DSSCs), Cs2SnI6 exhibits a 32% enhancement in power conversion efficiency compared to the control, which is attributed to its superior light absorption and the matched energy levels of the device. The improved performance of DSSC employed with Cs2SnI6 is integrated with a supercapacitor and capable of photo-charging the device with a discharged specific capacitance of 92.12 F g-1 at 1 A g-1. The Cs2SnI6 DSSC-supercapacitor demonstrates twice the stability of the pristine device, with a retention rate of 81.27% under 1-sun illumination and a ≥ 60% stability improvement under halogen lamp illumination after 30 cycles, even without encapsulation. This study demonstrates, for the first time, the feasibility of Cs2SnI6 under visible light, highlighting its potential for future indoor energy applications.
通过机械化学的方法,将预先制备好的CsI和SnI4进行反应,并加入氢碘酸(HI),在简易条件下稳定反应12 min,建立了Cs2SnI6的快速合成方法。Rietveld细化分析表明,合成的Cs2SnI6在相对湿度大于70%的环境条件下,结晶度稳定4个月以上,纯度无明显变化。当加入到染料敏化太阳能电池(DSSCs)中时,Cs2SnI6的功率转换效率比对照提高了32%,这归因于其优越的光吸收能力和器件的匹配能级。采用Cs2SnI6的DSSC性能得到了改善,并集成了一个超级电容器,能够在1 a g-1下以92.12 F -1的放电比电容对器件进行光充电。Cs2SnI6 dssc超级电容器的稳定性是原始器件的两倍,在1个太阳照射下保持率为81.27%,在卤素灯照射30次后稳定性提高≥60%,即使没有封装。该研究首次证明了Cs2SnI6在可见光下的可行性,突出了其未来室内能源应用的潜力。
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Electrochimica Acta
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