Electrochimica Acta最新文献

英文中文

Hydrogel-assisted fabrication of hierarchical NiSx@N, S-codoped carbon with controlled phase and tunable sulfur vacancies for ultra-high supercapacitor and oxygen evolution performance 水凝胶辅助制备具有可控相和可调硫空位的分级NiSx@N s共掺杂碳，用于超高超级电容器和析氧性能

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-01-07 DOI: 10.1016/j.electacta.2026.148158

Omnya Mostafa , Amr Awad Ibrahim , Ahmed Gebreil , S.A. El-Hakam , Awad I. Ahmed , Doaa A. Kospa

Developing innovative electrode materials with precise structure and composition seems to pose a significant barrier for high-performance supercapacitors and oxygen evolution. Herein, the NiS_x embedded in N, S-codoped hierarchically porous carbon (NiS_x@NSC) was developed via a hydrogel-assisted method. Ni ions were confined within the microchambers of the polyacrylamide (PAM) hydrogel, promoting uniform sulfuration and preventing the agglomeration of ultrafine NiS_x nanoparticles. The composite was thermally treated at different temperatures while optimizing the Ni/S ratio to control the phase evolution and determine the most active phase. The optimized NiS_x@NSC-350, the NiS₂-rich composite with nitrogen and sulfur vacancies, exhibited a high specific capacitance of 1586 F g⁻¹ at 1 A g⁻¹. The asymmetric supercapacitor device constructed from NiS_x@NSC-350 and active carbon demonstrated a high energy density of 70.3 Wh kg⁻¹ at 733 W kg⁻¹ with remarkable cycling efficiency at 10 A g⁻¹ for over 4000 cycles. To assess the multifunctionality of the modified nanostructure, the NiS_x@NSC-350 was also examined for its oxygen evolution reaction (OER), exhibiting a low overpotential of 270 and 320 mV versus RHE at current densities of 20 and 50 mA cm⁻², respectively. These results provide insight into transition metal-doped electrodes with an engineered, hierarchical structure for electrochemical applications.

开发具有精确结构和组成的创新电极材料似乎是高性能超级电容器和析氧的重要障碍。本文通过水凝胶辅助方法将NiSx嵌入到N， s共掺杂的分层多孔碳（NiSx@NSC）中。Ni离子被限制在聚丙烯酰胺（PAM）水凝胶的微室中，促进了均匀的硫化，防止了超细NiSx纳米颗粒的团聚。在不同温度下对复合材料进行热处理，同时优化Ni/S比以控制相演化，确定最活跃的相。优化后的NiSx@NSC-350是含有氮和硫空位的富含nis2的复合材料，在1 a g−1时具有1586 F g−1的高比电容。由NiSx@NSC-350和活性炭组成的非对称超级电容器器件在733 W kg - 1下具有70.3 Wh kg - 1的高能量密度，在10 a g - 1下具有显著的循环效率，循环次数超过4000次。为了评估修饰后的纳米结构的多功能性，我们还测试了NiSx@NSC-350的析氧反应（OER），在电流密度分别为20和50 mA cm - 2时，与RHE相比，其过电位分别为270和320 mV。这些结果为过渡金属掺杂电极提供了一种工程的、层次结构的电化学应用。

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引用次数: 0

Molecular-level interface engineering via 3-mercaptopropionic acid for dendrite-free and long-life aqueous zinc-ion batteries 基于3-巯基丙酸的无枝晶长寿命水性锌离子电池分子级界面工程研究

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-01-07 DOI: 10.1016/j.electacta.2026.148150

Dezhi Pan, Yuanqiang Wang, Yaxin Wang, Chengjie Wang, Yichuan Rui, Jing Li

The commercialization of aqueous zinc-ion batteries (AZIBs) is hindered by Zn dendrite growth and parasitic reactions. Although interface engineering offers a promising solution, creating a protective layer that integrates dendrite suppression, corrosion resistance, and fast ion transport remains a challenge. Herein, we propose a facile molecular-level interface engineering strategy using 3-mercaptopropionic acid (3-MPA) to construct a multifunctional ridge-like interlayer on Zn foil (3-MPA@Zn). The 3-MPA molecules synergistically coordinate with the Zn surface via covalent Zn-S bonds and carboxylate carboxyl (-COOH) group, which preferentially exposes the Zn(002) plane and facilitates a stable and hydrophobic interface. Consequently, the 3-MPA@Zn symmetric cell achieves exceptional cycling stability exceeding 1000 h at 1 mA cm^-2 and 175 h at 5 mA cm^-2, outperforming the bare Zn counterpart. The superior electrochemical performance is attributed to reduced nucleation overpotential, diminished charge transfer resistance, and low activation energy for Zn²⁺ deposition. Nearly 100% of Coulombic efficiency over 550 cycles was acquired for the 3-MPA@Zn//Cu half-cell, reflecting high reversibility and accelerated reaction kinetics for the Zn²⁺ plating/stripping. When paired with an α-MnO₂ cathode, the full cell delivers a high initial capacity of 191.2 mAh g^-1 at 0.1 A g^-1 and outstanding cycling stability over 1200 cycles at 1 A g^-1, demonstrating its advantageous stability against aqueous corrosion and water-induced side reactions. This work provides new insights into the molecular-level interface engineering through thiol-based modifier design and offers a scalable route toward developing durable, dendrite-free, and corrosion-resistant Zn anodes for AZIBs.

锌枝晶生长和寄生反应阻碍了水性锌离子电池的商业化。虽然界面工程提供了一个很有前途的解决方案，但创建一个集枝晶抑制、耐腐蚀和快速离子传输为一体的保护层仍然是一个挑战。在此，我们提出了一种简单的分子水平界面工程策略，使用3-巯基丙酸（3-MPA）在锌箔上构建多功能脊状夹层（3-MPA@Zn）。3-MPA分子通过共价Zn- s键和羧酸羧基（-COOH）与Zn表面协同配合，优先暴露Zn（002）平面，形成稳定的疏水界面。因此，3-MPA@Zn对称电池在1ma cm-2和5ma cm-2下的循环稳定性分别超过1000小时和175小时，优于裸锌电池。优异的电化学性能是由于Zn2+沉积的成核过电位降低，电荷转移电阻降低，活化能低。3-MPA@Zn//Cu半电池在550次循环中获得了近100%的库仑效率，反映了Zn2+电镀/剥离的高可逆性和加速反应动力学。当与α-MnO2阴极配对时，完整的电池在0.1 a g-1下提供191.2 mAh g-1的高初始容量，并且在1 a g-1下超过1200次循环的出色稳定性，表明其具有抗水性腐蚀和水诱导副反应的优势。这项工作通过巯基改性剂的设计为分子级界面工程提供了新的见解，并为开发耐用、无枝晶和耐腐蚀的azib锌阳极提供了一条可扩展的途径。

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引用次数: 0

Stability of consumable anode under thermal stress field induced via molten salt electrolysis 熔盐电解热应力场下易耗阳极的稳定性

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-01-07 DOI: 10.1016/j.electacta.2026.148152

Xiuhao Jiao , Yuqing Xu , Yiwen Ren , Shaolong Li , Zepeng Lv , Yong Fan , Bin Yang , Jilin He , Jianxun Song

Electrode stability is a critical determinant of the long-term operational efficiency and service life of electrochemical systems. Molten salt electrolysis technology utilizing consumable anodes offers a promising green and low-carbon pathway for the preparation of refractory metals and alloys, owing to its process simplicity, environmental friendliness, and high product purity. However, during electrolysis, the coupled thermo-mechanical fields can induce localized stress concentration in the anode, posing challenges to its structural integrity. This paper takes the electrolytic extraction of metallic zirconium using ZrC_xO_y anode as an example to study the stability of consumable anodes. Through a combination of experimental and simulation approaches, we systematically analyze the influence of key parameters-including anode geometry, immersion depth, and electrolysis temperature-on stability. The findings aim to provide theoretical guidance for optimizing electrolysis processes and designing robust anode structures.

电极稳定性是电化学系统长期运行效率和使用寿命的关键决定因素。利用消耗性阳极的熔盐电解技术以其工艺简单、环境友好、产品纯度高的特点，为制备难熔金属和合金提供了一条绿色低碳的发展道路。然而，在电解过程中，耦合的热-机械场会引起阳极局部应力集中，对其结构完整性构成挑战。本文以ZrCxOy阳极电解提取金属锆为例，研究了耗材阳极的稳定性。通过实验和模拟相结合的方法，我们系统地分析了关键参数-包括阳极几何形状，浸泡深度和电解温度-对稳定性的影响。研究结果旨在为优化电解工艺和设计坚固的阳极结构提供理论指导。

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引用次数: 0

Tin Perovskite Thin Films with Enhanced Phase Air Stability and Electrochemical Stability via Additive Engineering 通过增材工程提高相空气稳定性和电化学稳定性的钙钛矿锡薄膜

IF 6.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-01-06 DOI: 10.1016/j.electacta.2025.148075

Tehmina Mushtaq, Naeem Ahmed, Muhammad Musharraf, Muhammad Usman, Abdul Majid, Javed Iqbal, Gul Hassan, Mashkoor Ahmed

引用次数: 0

Platinum nanoparticles enhanced electrochemiluminescence immunosensor for ultra-trace evaluation of cancerembryonic antigen using MXene@CeO2 铂纳米粒子增强的电化学发光免疫传感器用于癌胚抗原的超痕量评价

IF 6.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-01-06 DOI: 10.1016/j.electacta.2026.148130

Sepideh Shafaei, Rahim Mohammad-Rezaei, Balal Khalilzadeh, Habib Tajalli, Ibrahim Isildak

引用次数: 0

Ti3C2Tx MXene/AuNPs-empowered microfluidic electrochemical sensor for simultaneous sensing of lactate and potassium ions in blood Ti3C2Tx MXene/ aunps增强微流控电化学传感器同时检测血液中乳酸和钾离子

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-01-06 DOI: 10.1016/j.electacta.2026.148137

Yu-hang Ma , Yi-feng Ding , Liu-hong Yang , Jing Wen , Ke-fan Duan , Ge Dai , Feng-Feng Mo , Jia-feng Wang

The simultaneous monitoring of lactate and potassium ions (K⁺) in blood is critical for the management of critical conditions like crush syndrome, yet it remains a significant challenge. Herein, we present a novel integrated microfluidic electrochemical sensor for the dual-mode detection of these biomarkers. The sensor leverages a synergistic composite of Ti₃C₂T_x MXene and electrodeposited gold nanoparticles (AuNPs) to create a highly sensitive sensing interface. The microfluidic chip, fabricated with polymethylmethacrylate (PMMA), incorporates two independent detection chambers functionalized with lactate oxidase (LOx) and a valinomycin-based ion-selective membrane, respectively. This design enables specific and parallel detection from a single sample. The fabricated sensor demonstrated excellent performance. In a KCl solution, the sensor exhibited a linear range of 1 μM to 10 mM and a low LOD of 1 μM. In the 1 × PBS configuration of lactate solution, the sensor showed a linear range of 10 μM to 16 mM and an LOD of 10 μM. When applied to the analysis of rat plasma samples, the sensor showed strong correlation with a commercial hematology analyzer, confirming its accuracy and practical utility. This work provides a promising platform for point-of-care testing, offering a fast, convenient, and reliable method for simultaneous biomarker monitoring.

同时监测血液中的乳酸和钾离子（K +）对于治疗挤压综合征等危重疾病至关重要，但它仍然是一个重大挑战。在此，我们提出了一种新的集成微流控电化学传感器，用于双模式检测这些生物标志物。该传感器利用Ti3C2Tx MXene和电沉积金纳米颗粒（AuNPs）的协同复合材料来创建高灵敏度的传感界面。该微流控芯片由聚甲基丙烯酸甲酯（PMMA）制成，包括两个独立的检测室，分别由乳酸氧化酶（LOx）和基于缬霉素的离子选择膜功能化。这种设计可以从单个样品中进行特定的并行检测。所制备的传感器具有优异的性能。在KCl溶液中，传感器的线性范围为1 μM ~ 10 mM， LOD低至1 μM。在1 × PBS乳酸溶液中，传感器的线性范围为10 μM ~ 16 mM， LOD为10 μM。应用于大鼠血浆样品分析时，该传感器与商业血液学分析仪显示出很强的相关性，证实了其准确性和实用性。这项工作为即时检测提供了一个有前景的平台，为同时监测生物标志物提供了一种快速、方便和可靠的方法。

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引用次数: 0

Electronic metal-support interactions between Pt-layered double hydroxide interfaces for boosting luminol electrochemiluminescence and its analytical application of interleukin-1 1β detection pt层状双氢氧化物界面之间的电子金属支撑相互作用促进发光氨电化学发光及其在白细胞介素-1 - 1β检测中的分析应用

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-01-06 DOI: 10.1016/j.electacta.2026.148136

Chao Lu , Xiaojuan Jia , Fei Yan , Yucheng Zhou

Cytokines, particularly interleukin-1β (IL-1β), play critical roles in immune regulation and inflammatory pathologies but require ultrasensitive and rapid detection methods. Herein, we developed an electrochemiluminescence (ECL) biosensor for sensitive determination of IL-1β based on the Pt nanoparticles (PtNPs)-decorated oxygen vacancy (Ov)-rich CoAl layered double hydroxide (LDH) to amplify the "luminol-dissolved oxygen (O₂)" ECL system. Electronic metal-support interaction (EMSI) between Pt and LDH can facilitate the electron transfer and enhance the activation of dissolved O₂, ultimately achieving a 5-fold ECL signal enhancement compared to the bare indium tin oxide (ITO) electrode. Functionalized with anti-IL-1β antibodies, the optimized Pt@LDHOv/ITO based immunosensing interface allows the specific quantitation for IL-1β based on the occurrence of antigen-antibody binding at the electrode interface. The designed biosensor demonstrates a broad linear range (1 fg/mL∼0.1 μg/mL) and a low detection limit (0.47 fg/mL), outperforming conventional methods. This EMSI-driven interface engineering strategy offers a versatile platform for design of LDH-noble metal composite luminescent interfaces and detection of various inflammation-related biomarkers.

细胞因子，特别是白细胞介素-1β (IL-1β)，在免疫调节和炎症病理中起着关键作用，但需要超灵敏和快速的检测方法。在此，我们基于Pt纳米粒子（PtNPs）修饰富氧空位（Ov）的煤层双氢氧化物（LDH），开发了一种用于IL-1β敏感测定的电化学发光（ECL）生物传感器，以扩增“鲁米诺-溶解氧（O2）”ECL系统。Pt和LDH之间的电子金属-支撑相互作用（EMSI）可以促进电子转移，增强溶解O2的活化，最终实现5倍于裸氧化铟锡（ITO）电极的ECL信号增强。通过抗IL-1β抗体功能化，优化的Pt@LDH-Ov/ITO免疫传感接口允许基于抗原-抗体结合在电极界面上的发生特异性定量IL-1β。所设计的生物传感器具有宽线性范围（1 fg/mL ~ 0.1 μg/mL）和低检出限（0.47 fg/mL），优于传统方法。这种emsi驱动的界面工程策略为ldh -贵金属复合发光界面的设计和各种炎症相关生物标志物的检测提供了一个通用的平台。

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引用次数: 0

Optimizing CuSCN incorporation as carbon electrode additive for enhanced interfaces in ambient-processed perovskite solar cells 优化CuSCN作为碳电极添加剂在环境处理钙钛矿太阳能电池中的增强界面

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-01-06 DOI: 10.1016/j.electacta.2026.148149

Junivan Sulistianto , Akinori Konno , Tomy Abuzairi , Nji Raden Poespawati

Perovskite solar cells (PSCs) have become one of the technologies with high potential for solar-harvesting devices for their capability in efficient energy conversion and suppressing cost in production. However, carbon-based PSCs (C-PSCs), which promote carbon as an electrode to replace the high cost of a noble-metal electrode, still suffer performance limitations owing to inferior interfacial contact and inefficient charge extraction at the interface between perovskite and carbon. In this study, the interfacial engineering of C-PSCs was optimized by using CuSCN as both a hole transport layer (HTL) and a carbon additive. Two forms of CuSCN were examined as carbon additives: powder and solution, with the solution prepared using dipropyl sulfide (DPS) and diethyl sulfide (DES) as solvents. Photoluminescence (PL) analysis showed enhanced charge collection and suppressed carrier recombination in the C-PSC using CuSCN in DPS as the carbon additive. Electrochemical impedance spectroscopy (EIS) further confirmed a decrease in series resistance and a boost in charge transport parameters. As a result, the CuSCN in the DPS-based device exhibited superior interfacial quality and achieved the highest efficiency of 11.09%, outperforming both the powder and DES-based counterparts. These findings demonstrate that optimizing CuSCN incorporation as a carbon additive, particularly its form and solvent medium, is essential for achieving better interfacial contact and higher C-PSC efficiency.

钙钛矿太阳能电池（PSCs）以其高效的能量转换和低廉的生产成本成为太阳能收集装置中极具潜力的技术之一。然而，碳基PSCs （C-PSCs）虽然促进了碳作为电极来取代昂贵的贵金属电极，但由于钙钛矿和碳之间的界面接触差和电荷提取效率低，仍然受到性能限制。本研究利用CuSCN作为空穴传输层（HTL）和碳添加剂，对c - psc的界面工程进行了优化。以二丙基硫化物（DPS）和二乙基硫化物（DES）为溶剂制备了两种形式的CuSCN作为碳添加剂：粉末和溶液。光致发光（PL）分析表明，使用DPS中的CuSCN作为碳添加剂，C-PSC的电荷收集增强，载流子重组抑制。电化学阻抗谱（EIS）进一步证实串联电阻的降低和电荷输运参数的提高。结果表明，基于dps的器件中的CuSCN具有优异的界面质量，并且达到了11.09%的最高效率，优于基于粉末和基于des的器件。这些发现表明，优化CuSCN作为碳添加剂的加入，特别是其形式和溶剂介质，对于实现更好的界面接触和更高的C-PSC效率至关重要。

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引用次数: 0

Tuning the performance of switchable electrochemical capacitors: The role of gate electrode size in G-Cap functionality 调节可开关电化学电容器的性能：栅极尺寸在G-Cap功能中的作用

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-01-06 DOI: 10.1016/j.electacta.2026.148123

Nick Niese , Przemyslaw Galek , Ahmed Bahrawy , Anja Birnbaum , Christin Gellrich , Yannik Bräuniger , Julia Grothe , Stefan Kaskel

Establishing technologies and device architectures for functional ionic electroadsorption devices is essential for advancing a wide range of fields, from microelectronics and iontronics to biointerfacing and neuromodulation. Therefore, monolithic integration is one of the key goals for the future miniaturization of iontronic systems. The monolithic in-plane G-Cap (gated-capacitor), a novel iontronic element, functions as a switchable electrochemical capacitor with gating characteristics similar to transistors in electronic circuits. Its switching behavior (switchable capacitance) is based on ionic currents and ion electroadsorption, enabled by the introduction of a third “gate” electrode. This gate allows for reversible ion depletion and injection from/into the two-electrode "working" micro-capacitor inter-electrode space in response to the applied bias voltage. This study investigates the influence of gate electrode size, specifically the ratio of between its geometric surface area and that of the counter electrode, on the G-Cap performance. Understanding this behavior is crucial for the precise control of the G-Cap’s electrochemical behavior.

建立功能性离子电吸附装置的技术和设备架构对于推进从微电子学和电子学到生物界面和神经调节的广泛领域至关重要。因此，单片集成是未来电子系统小型化的关键目标之一。单片平面内栅极电容器（G-Cap）是一种新型离子电子元件，其功能类似于电子电路中的晶体管，具有可开关的电化学电容器的门控特性。它的开关行为（可开关电容）基于离子电流和离子电吸附，通过引入第三个“栅极”电极实现。该栅极允许可逆离子耗尽，并根据施加的偏置电压从两电极“工作”的微电容器电极间空间注入。本研究探讨栅极尺寸，特别是栅极几何表面积与对电极几何表面积之比，对G-Cap性能的影响。了解这种行为对于精确控制G-Cap的电化学行为至关重要。

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引用次数: 0

pH sensitive gel pads for the visualization of anodes and cathodes on zinc 用于锌阳极和阴极可视化的pH敏感凝胶垫

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-01-06 DOI: 10.1016/j.electacta.2026.148134

Svenja Valet, Tatjana Bohlmann, Andreas Burkert, Gino Ebell

Zinc and zinc alloys have many applications. Zinc corrosion takes place in the atmosphere and is assumed to follow the water drop theory (a macroelement), in which the anode is at the centre of the drop and is surrounded by a cathode. This paper is the first to use gel electrolytes made of agar to visualize anodic and cathodic areas on zinc samples in order to examine the water drop theory. For that, agar gels were added with universal pH indicators, as the anode and cathode exhibit different pH values. In this paper, different amounts of pH indicators were tested to determine whether the indicator influences the potential, the impedance, phase shift, corrosion current and potential and corrosion layer resistance.

锌和锌合金有许多用途。锌腐蚀发生在大气中，并被认为遵循水滴理论（一种大元素），其中阳极位于水滴的中心，并被阴极包围。本文首次使用由琼脂制成的凝胶电解质来可视化锌样品的阳极和阴极区域，以检验水滴理论。为此，由于阳极和阴极的pH值不同，我们添加了通用pH指示剂琼脂凝胶。本文测试了不同量的pH指示剂，以确定指示剂对电位、阻抗、相移、腐蚀电流、电位和腐蚀层电阻的影响。

引用次数: 0

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