Electrochimica Acta最新文献

Rational design of magnetron sputtering modification strategies to unlock the cycle reversibility and rate capability of LiMn0.8Fe0.2PO4 cathodes 合理设计磁控溅射改性策略，解锁LiMn0.8Fe0.2PO4阴极的循环可逆性和速率能力

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-05-01 Epub Date: 2026-02-17 DOI: 10.1016/j.electacta.2026.148476

Jinjie Niu , Yan Wang , Wenbin Fu , Ling Tan , Jiahui Dai , Zhenghua Deng , Ziyuan Liu , Faquan Yu

Compared to commercial LiFePO₄ (LFP) cathode materials, manganese-based olivine material LiMn_0.8Fe_0.2PO₄ (LMFP) has garnered greater attention due to its comprehensive enhancement of battery performance, particularly achieving significant breakthroughs in energy density. However, its rate performance and cycle life are limited by low charge conduction and Jahn-Teller distortion of Mn³⁺. To address these issues, this study employed radio-frequency magnetron sputtering to deposit LiPON, ZnO, and Li₃PO₄ films on LMFP electrodes for comparison. The results demonstrate that the cross-linked network structure formed by nitrogen bidentate and tridentate bonds in LiPON enhances ionic conductivity and interfacial stability. Increasing the LiPON coating layer to 2.4 nm resulted in optimal electrochemical performance of the LiMn_0.8Fe_0.2PO₄ cathodes. The initial discharge capacity was 156.9 mAh g^-1 at a rate of 0.1C. The capacities measured during multi-rate charge-discharge experiments at rates ranging from 0.1C to 5C were 147.8 mAh g^-1, 141.2 mAh g^-1, and 122.7 mAh g^-1 at 1C, 2C, and 5C, respectively. There was very little capacity loss when the rate was brought back to 0.1C. Capacity retention rose from 88.0% to 95.7% after 100 cycles at 0.5C. LMFP-LiPON materials have better transition metal states close to the Fermi level and lower band gaps, according to density functional theory (DFT) simulations. In addition to increasing electronic conductivity, accelerating lithium-ion transport, and improving corrosion resistance, these changes significantly reduce the Li migration barrier. The approach offers a strong and adaptable lever for designing lithium-ion batteries of the future.

与商用LiFePO4 （LFP）正极材料相比，锰基橄榄石材料LiMn0.8Fe0.2PO4 （LMFP）因其对电池性能的全面提升，特别是在能量密度方面取得了重大突破而备受关注。然而，它的倍率性能和循环寿命受到低电荷传导和Mn3+的Jahn-Teller畸变的限制。为了解决这些问题，本研究采用射频磁控溅射在LMFP电极上沉积LiPON， ZnO和Li3PO4薄膜进行比较。结果表明，LiPON中氮双齿和三齿键形成的交联网络结构增强了离子电导率和界面稳定性。将LiPON涂层层数增加到2.4 nm, LiMn0.8Fe0.2PO4阴极的电化学性能达到最佳。初始放电容量为156.9 mAh g-1，放电速率为0.1C。在0.1C至5C的倍率充放电实验中，在1C、2C和5C的倍率下测得的容量分别为147.8 mAh g-1、141.2 mAh g-1和122.7 mAh g-1。当速率恢复到0.1C时，容量损失很小。在0.5℃下循环100次后，容量保留率从88.0%提高到95.7%。根据密度泛函理论（DFT）模拟，lmpp - lipon材料具有更好的接近费米能级的过渡金属态和更低的带隙。除了提高电子导电性、加速锂离子输运和提高耐腐蚀性外，这些变化还显著降低了锂离子的迁移势垒。这种方法为设计未来的锂离子电池提供了一个强大的、适应性强的杠杆。

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引用次数: 0

3D star-shaped morphological modify carbon-nitrogen compounds of zeolitic imidazolate frameworks for Microsupercapacitors 微超级电容器用咪唑酸分子筛框架的三维星形形态修饰碳氮化合物

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-05-01 Epub Date: 2026-02-05 DOI: 10.1016/j.electacta.2026.148383

Dan Tu , Ming Chen , Yue Guo , Shuaichao Mao , Yu Shi , Le Yuan , Qifeng Pan , Jianhua Xu , Daniel H.C. Chua

To enhance supercapacitor performance, it is crucial to design electrode materials that are abundant in active sites and incorporate specific functional groups to facilitate rapid ion transport. This study demonstrates the synthesis of star-shaped CoZn-ZIFs using a green method. The derived CoZn-NCs exhibit a wealth of effective functional groups, achieved through the rational tuning of elemental proportions and calcination temperatures. When utilized as a supercapacitor electrode, the Co₁Zn₁-NCs/550 electrode attained a specific capacitance of 928 F g⁻¹ at a current density of 0.1 A g⁻¹. Density functional theory (DFT) results further reveal a narrow energy band, suggesting that CoZn-NCs possess good conductivity. A solid-state flexible micro-supercapacitor was constructed using the Co₁Zn₁-NCs/550 electrode material. This device exhibited an area capacitance of 637.5 mF cm⁻² accompanied by remarkable electrochemical durability with 97% capacitance retention performance after 5000 cycles at a current density of 1 mA cm⁻². Furthermore, devices connected in series and/or parallel successfully powered light-emitting diodes for several minutes, as demonstrated in a video recording, confirming their potential for practical applications. This work offers promising insights into enhancing energy storage.

为了提高超级电容器的性能，设计具有丰富活性位点并包含特定官能团的电极材料以促进离子的快速传输是至关重要的。本研究展示了用绿色方法合成星形CoZn-ZIFs。通过合理调整元素比例和煅烧温度，所得的CoZn-NCs具有丰富的有效官能团。当用作超级电容器电极时，Co1Zn1-NCs/550电极在0.1 a g⁻¹的电流密度下获得了928 F g⁻¹的比电容。密度泛函理论（DFT）进一步揭示了CoZn-NCs具有较窄的能带，表明其具有良好的导电性。采用Co1Zn1-NCs/550电极材料构建了固态柔性微型超级电容器。该装置的面积电容为637.5 mF cm⁻²，并具有显著的电化学耐久性，在电流密度为1 mA cm⁻²的情况下，经过5000次循环后，其电容保持性能达到97%。此外，串联和/或并联的设备成功地为发光二极管供电几分钟，如视频记录所示，证实了它们在实际应用中的潜力。这项工作为增强能量储存提供了有希望的见解。

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引用次数: 0

A back-to-back flexible supercapacitor based on novel polyvinyl alcohol-4-carboxyphenylboronic acid hydrogel coated graphite paper current collector 新型聚乙烯醇-4-羧基苯基硼酸水凝胶涂覆石墨纸集热器的背对背柔性超级电容器

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-05-01 Epub Date: 2026-02-22 DOI: 10.1016/j.electacta.2026.148515

Zhirong Ren, Shaozhen Liu, Jiaxin Wang, Haihan Zhou

Flexible supercapacitors (SCs) with a sandwich structure constructed using traditional current collectors usually exhibit poor utilization of electroactive materials and unsatisfactory mechanical deformation stability. In this work, a novel polyvinyl alcohol-4-carboxyphenylboronic acid hydrogel-coated graphite paper (PVA-CPBA/GP) current collector is developed. The CPBA dopants covalently immobilized on PVA chains act as anchoring sites, promoting the dispersed growth of polypyrrole (PPy) within the 3D hydrogel network. The resulting PPy@PVA-CPBA electrode with an interpenetrating network structure shows evidently enhanced electrochemical performance compared to PPy/PVA and PPy electrodes. Using the PVA-CPBA/GP current collector, a separator-free back-to-back flexible SC is also constructed successfully. The device exhibits an areal capacitance of 110.2 mF cm⁻² at 0.5 mA cm⁻², retains 82.6 % of its initial capacitance after 10,000 cycles, and maintains 83.8 % of its initial capacitance after 1000 bending cycles. These performance metrics are significantly higher than those of the PPy/PVA SC as a control. This work demonstrates that the developed PVA-CPBA/GP current collector not only promotes the highly efficient utilization of PPy, enhancing the capacitive performance and cycling stability of the SC, but also enables the construction of a separator-free back-to-back flexible SC, thereby improving its mechanical deformation stability. The hydrogel-based current collector we propose presents a new perspective for developing high-performance flexible SCs.

采用传统集流器构造的夹层结构柔性超级电容器，其电活性材料利用率较差，机械变形稳定性不理想。本文研制了一种新型聚乙烯醇-4-羧基苯基硼酸水凝胶涂覆石墨纸（PVA-CPBA/GP）集流器。共价固定在PVA链上的CPBA掺杂剂作为锚定位点，促进聚吡咯（PPy）在三维水凝胶网络中的分散生长。所得PPy@PVA-CPBA电极具有互穿网络结构，与PPy/PVA和PPy电极相比，电化学性能明显提高。采用PVA-CPBA/GP集流器，成功构建了无隔板背靠背柔性SC。该器件在0.5 mA cm⁻2下的面电容为110.2 mF cm⁻2，在10000次弯曲循环后仍保持82.6%的初始电容，在1000次弯曲循环后仍保持83.8%的初始电容。这些性能指标明显高于作为对照的PPy/PVA SC。本研究表明，所开发的PVA-CPBA/GP集流器不仅促进了PPy的高效利用，提高了SC的电容性能和循环稳定性，而且可以构建无分离器的背靠背柔性SC，从而提高其机械变形稳定性。本文提出的基于水凝胶的集流器为开发高性能柔性超导材料提供了新的前景。

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引用次数: 0

Boron transport and remediation performance in sediment microbial fuel cells via electromigration and synergistic ecosystem interactions 硼在沉积物微生物燃料电池中通过电迁移和协同生态系统相互作用的转运和修复性能

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-05-01 Epub Date: 2026-02-14 DOI: 10.1016/j.electacta.2026.148452

Anıl Yakar , Onur Can Türker , Nuray Yilmaz Baran , Talat Baran

Boron contamination in aquatic sediments poses severe ecological risks, necessitating remediation strategies that are both sustainable and energy-efficient. This study developed an integrated sediment microbial fuel cell (SMFC) system coupled with Lemna gibba and magnetic chitosan-EDTA (Ch-Mag-Ed) composite beads to enhance boron removal via electromigration, plant uptake, and specific adsorption. The hybrid system demonstrated superior performance, achieving a maximum power density of 3.72 mW m⁻², a boron removal efficiency of 44.9 % from the sediment, and a chemical oxygen demand (COD) removal of 81.4 %. Electromigration was identified as the primary driving force transporting boron from the sediment to the overlying water, where it was effectively removed by the floating cathode components. The Ch-Mag-Ed beads served a critical dual function: acting as a chemical buffer to rapidly adsorb migrating boron and mitigating phytotoxicity, which significantly improved the relative growth rate of L. gibba. Furthermore, the system successfully reduced the sediment Geo-accumulation Index (Igeo) from heavily to moderately contaminated levels. This synergistic approach confirms that coupling bio-electrochemical systems with adsorption-assisted rhizofiltration provides a robust, energy-positive solution for remediating metalloid-contaminated sediments

水生沉积物中的硼污染具有严重的生态风险，需要可持续和节能的修复策略。本研究开发了一种集成的沉积物微生物燃料电池（SMFC）系统，该系统结合了Lemna gibba和磁性壳聚糖- edta （Ch-Mag-Ed）复合微珠，通过电迁移、植物吸收和特定吸附来增强硼的去除。该混合系统表现出优异的性能，最大功率密度为3.72 mW m - 2，对沉积物的硼去除效率为44.9%，对化学需氧量（COD）的去除率为81.4%。电迁移被认为是将硼从沉积物输送到上覆水体的主要驱动力，在那里硼被漂浮的阴极组分有效地去除。Ch-Mag-Ed微珠具有快速吸附迁移硼和减轻植物毒性的双重作用，显著提高了长毛藓的相对生长速度。此外，该系统成功地将沉积物地质堆积指数（Igeo）从重度污染水平降低到中度污染水平。这种协同方法证实，耦合生物电化学系统与吸附辅助根茎过滤为修复金属污染的沉积物提供了一种强大的、能量正的解决方案

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引用次数: 0

All-solid-state flexible symmetric light-driven supercapacitor based on indium oxide-modified carbon nanotube bifunctional photoelectrodes 基于氧化铟修饰碳纳米管双功能光电极的全固态柔性对称光驱动超级电容器

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-05-01 Epub Date: 2026-02-13 DOI: 10.1016/j.electacta.2026.148446

Mohamad Mohsen Momeni , Hedieh Darabian , Hossein Mohammadzadeh Aydisheh , Fuxiang Zhang

Light-driven supercapacitors (LDSCs) enable sustainable energy storage in flexible forms for portable devices and transportation. Flexible carbon-based electrodes offer promising conductivity, lightness, strength, durability, high surface area, porosity and flexibility. Carbon nanotubes decorated with indium oxide prepared by hydrothermal treatment serve as a flexible photoelectrode that integrates both photoactive and energy storage functionalities in LDSCs. The In₂O₃@CNT electrode significantly improves the electrochemical performance compared to pure In₂O₃ and bare CNTs due to the superior electrical conductivity and larger specific surface area. This improvement is due to the synergistic integration of In₂O₃ with carbon nanotubes, which optimize the charge transport and accessibility of the active sites. Consequently, the optimized In₂O₃@CNT electrode delivered a high capacitance of 0.9 mAh/cm² at a current density of 0.08 mA/cm². Under illumination, the specific capacitance of the electrode reached 1.4 mAh/cm², which corresponds to a 1.55-fold increase compared to conditions in the dark. The device showed exceptional flexibility when assembled into a flexible symmetrical LDSC with a sandwich structure. It achieved a specific capacitance of 1.2 mAh/cm², an energy density of 1.77 mWh/cm² and a power density of 53.15 mW/cm². Light-assisted operation resulted in a remarkable increase in specific capacitance compared to dark conditions, suggesting that charges generated by light increase conductivity and accelerate charge transfer processes. In addition, the effects of simultaneous double-sided illumination on the characterization of this device were evaluated, with the results indicating that the capacitance under double-sided illumination exceeds that under single-sided illumination. Overall, the study provides a practical and simple approach to increase the light absorption efficiency and overall performance of flexible LDSCs.

光驱动超级电容器（LDSCs）能够以灵活的形式为便携式设备和运输实现可持续的能量存储。柔性碳基电极具有良好的导电性、轻便性、强度、耐久性、高表面积、多孔性和灵活性。水热法制备氧化铟修饰的碳纳米管作为柔性光电极，在ldsc中具有光活性和储能功能。与纯In2O3和裸碳纳米管相比，In2O3@CNT电极具有更好的导电性和更大的比表面积，显著提高了电化学性能。这种改善是由于In2O3与碳纳米管的协同集成，优化了电荷传输和活性位点的可达性。因此，优化后的In2O3@CNT电极在0.08 mA/cm2的电流密度下提供了0.9 mAh/cm2的高电容。在照明条件下，电极的比电容达到1.4 mAh/cm2，与黑暗条件相比增加了1.55倍。当组装成具有三明治结构的柔性对称LDSC时，该器件显示出非凡的灵活性。其比电容为1.2 mAh/cm2，能量密度为1.77 mWh/cm2，功率密度为53.15 mW/cm2。与黑暗条件相比，光辅助操作导致比电容显著增加，这表明光产生的电荷增加了电导率并加速了电荷转移过程。此外，还评估了双面同时照明对该器件表征的影响，结果表明双面照明下的电容大于单面照明下的电容。总的来说，该研究为提高柔性LDSCs的光吸收效率和整体性能提供了一种实用而简单的方法。

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引用次数: 0

Phase diagrams for electrodeposition of alloys from molten chlorides 用熔融氯化物电沉积合金的相图

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-05-01 Epub Date: 2026-02-10 DOI: 10.1016/j.electacta.2026.148411

Eli Brosh , Erez Boukobza

The optimization of the electrochemical co-deposition of alloys from molten salts can be facilitated by CALculation of PHase Diagrams (CALPHAD) using appropriate software and databases. An electrochemical phase diagram (EPD) is a phase diagram in which the ordinate is the electrical potential relative to a reference electrode and the abscissa is a composition variable; it can be used to predict the deposited phases under potentiostatic conditions. The electrochemical diagram (ECD), recently introduced by Kaptay [Electrochim. Acta 484 (2024) 144,002], relates the salt composition to the composition of the electrodeposited alloy under galvanostatic conditions in the limit of vanishing current. In this study, we develop a method to calculate both types of diagrams for electrodeposition from chloride salts using CALPHAD software, compatible with any CALPHAD-type model for the participating phases, including the molten salt. We also establish the relationship between the phase diagram and ECD. The electrodeposition of Co-Ni, Ce-La, Al-Sc and Co-Sn alloys on inert cathodes from a KCl-LiCl eutectic melt is analyzed and compared with experimental results reported in the literature. For Ce-La containing salts, electrodeposition on a reactive nickel cathode is also considered. Additional potential applications of EPDs and ECDs are discussed.

使用合适的软件和数据库计算相图（CALPHAD）可以促进熔盐合金电化学共沉积的优化。电化学相图（EPD）是一种相图，其中纵坐标是相对于参考电极的电势，横坐标是组成变量；它可用于恒电位条件下沉积相的预测。电化学图（ECD），最近由Kaptay [Electrochim]介绍。[j] . Acta 484(2024) 144,002]，将盐成分与消失电流极限下恒流条件下电沉积合金的成分联系起来。在本研究中，我们开发了一种使用CALPHAD软件计算氯化物盐电沉积两种类型图的方法，该软件与参与相（包括熔盐）的任何CALPHAD类型模型兼容。建立了相图与ECD之间的关系。分析了Co-Ni、Ce-La、Al-Sc和Co-Sn合金在KCl-LiCl共晶熔体惰性阴极上的电沉积过程，并与文献报道的实验结果进行了比较。对于含铈镧的盐，也考虑在活性镍阴极上电沉积。讨论了EPDs和ECDs的其他潜在应用。

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引用次数: 0

Polydopamine-functionalized carbon nanotube-graphene hybrid aerogel anodes: A promising strategy for boosting microbial fuel cell performance 多多巴胺功能化碳纳米管-石墨烯混合气凝胶阳极：提高微生物燃料电池性能的一种有前途的策略

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-05-01 Epub Date: 2026-02-17 DOI: 10.1016/j.electacta.2026.148461

Wei Guo , Yingying Chen , Jiayi Wang , Yanan Li , Yongchao Zhao , Saisai Yuan , Yunhui Yan

The performance of microbial fuel cell (MFC) is predominantly governed by the anode architecture and its interfacial physicochemical properties. Graphene aerogel, characterized by its distinctive porous structure and excellent conductivity, exhibits significant promise as high-performance anode material. Nevertheless, challenges such as the irreversible aggregation of graphene oxide nanosheets and intrinsic strong hydrophobicity remain critical issues that must be addressed. In this study, graphene aerogel hybrid materials (CGA and PCGA) were prepared via diverse doping strategies, and the impacts of CNT doping and PDA functionalization on GA performance enhancement were systematically compared. The results revealed that the polydopamine-modified carbon nanotube-graphene hybrid aerogel (PCGA) exhibits exceptional potential as a high-performance MFC anode, owing to its micron-scale hierarchical porous structure, abundant nitrogen-containing active sites, outstanding electrochemical activity, and enhanced biocompatibility. Continuous operation over five months demonstrated that MFCs equipped with PCGA-modified carbon brush anodes (PCGA/CB-MFCs) exhibited notable performance improvements compared to those using bare commercial carbon brush anodes: the maximum output voltage increased by 24%, the maximum power density rose by 145.3%, and energy conversion efficiency improved by 104.6%. Additionally, PCGA/CB-MFCs maintained excellent long-term operational stability. Furthermore, bioanodes electrochemical tests and riboflavin content monitoring demonstrated substantial improvements in the extracellular electron transfer efficiency of the PCGA/CB bioanode. SEM morphology observations, biomass measurements, and high-throughput sequencing analyses indicated that PCGA not only enhanced microbial attachment and proliferation (increasing biomass by 1.57 times) but also selectively enriched electrogenic bacteria (Paraclostridium, 32.1%). The as-prepared PCGA/CB anode endows MFCs with excellent power generation performance, making it a promising candidate for MFCs and other bioelectrochemical applications.

微生物燃料电池（MFC）的性能主要取决于阳极结构及其界面物理化学性质。石墨烯气凝胶以其独特的多孔结构和优异的导电性，成为高性能阳极材料。然而，诸如氧化石墨烯纳米片的不可逆聚集和固有的强疏水性等挑战仍然是必须解决的关键问题。本研究通过不同掺杂策略制备了石墨烯气凝胶杂化材料（CGA和PCGA），并系统比较了碳纳米管掺杂和PDA功能化对GA性能增强的影响。结果表明，聚多巴胺修饰的碳纳米管-石墨烯杂化气凝胶（PCGA）由于其微米级的分层多孔结构、丰富的含氮活性位点、优异的电化学活性和增强的生物相容性，具有作为高性能MFC阳极的特殊潜力。连续运行5个月的结果表明，与使用裸碳刷阳极的mfc相比，配备PCGA修饰碳刷阳极（PCGA/ cb - mfc）的mfc表现出显著的性能改善：最大输出电压提高24%，最大功率密度提高145.3%，能量转换效率提高104.6%。此外，PCGA/ cb - mfc保持了良好的长期运行稳定性。此外，生物阳极的电化学测试和核黄素含量监测表明，PCGA/CB生物阳极的细胞外电子转移效率有了实质性的提高。SEM形态观察、生物量测量和高通量测序分析表明，PCGA不仅增强了微生物的附着和增殖（生物量增加了1.57倍），而且选择性地富集了电致细菌（Paraclostridium, 32.1%）。制备的PCGA/CB阳极赋予mfc优异的发电性能，使其成为mfc和其他生物电化学应用的有希望的候选者。

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引用次数: 0

High entropy materials in electrocatalysis: A critical review of structure–property understanding 电催化中的高熵材料：结构性质理解的重要回顾

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-05-01 Epub Date: 2026-02-19 DOI: 10.1016/j.electacta.2026.148495

Melissa Jane Marks , Péter Gyenes , Rebecca Katharina Pittkowski

High entropy materials (HEMs) have emerged as a promising new class of electrocatalysts distinguished by their immense compositional flexibility and structural complexity, which can give rise to unprecedented catalytic properties and open new avenues for fundamental insight into catalysis. Realizing the potential of HEM electrocatalysts is dependent on building a deep understanding of structure-property relationships, based on nuanced characterization of both structural and electrochemical properties. This critical review navigates the current landscape of HEMs in electrocatalysis, exploring the evolving nomenclature and conceptual frameworks that shape how these materials are described and understood across the literature. We consider the diverse characterization techniques used to investigate the structure of HEMs, discussing the length scales and chemical contrasts they provide as well as the challenges associated with characterizing highly complex, multielement systems. Building on this foundation, we highlight key studies of HEMs in electrocatalysis, including those focused on screening the vast compositional space of HEMs to identify new electrocatalysts, or else examining the activity and stability of HEM electrocatalysts in detail, drawing insights into the factors that govern their performance. This critical review also emphasizes emerging research directions and strategies where advanced characterization and design approaches may help unlock the full potential of HEMs in electrocatalytic applications.

高熵材料（HEMs）以其巨大的组成灵活性和结构复杂性而成为一种有前途的新型电催化剂，它可以产生前所未有的催化性能，并为催化的基本见解开辟了新的途径。实现HEM电催化剂的潜力取决于对结构和电化学性质的细致表征，对结构-性质关系的深刻理解。这篇重要的综述导航了电催化中hem的当前景观，探索了塑造这些材料如何在文献中被描述和理解的不断发展的术语和概念框架。我们考虑了用于研究hem结构的各种表征技术，讨论了它们提供的长度尺度和化学对比，以及与表征高度复杂的多元素系统相关的挑战。在此基础上，我们重点介绍了HEM在电催化方面的关键研究，包括那些专注于筛选HEM的广泛组成空间以识别新的电催化剂的研究，或者详细检查HEM电催化剂的活性和稳定性，从而深入了解控制其性能的因素。这篇重要的综述还强调了新兴的研究方向和策略，其中先进的表征和设计方法可能有助于释放HEMs在电催化应用中的全部潜力。

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引用次数: 0

Electrostatic self-assembly of a topological-insulator Bi2Te3@MXene supramolecular composite for rapid and durable sodium-ion storage 拓扑绝缘体的静电自组装Bi2Te3@MXene用于快速持久钠离子储存的超分子复合材料

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-05-01 Epub Date: 2026-02-21 DOI: 10.1016/j.electacta.2026.148510

Yu Zhang , Yu-Peng Hu , Chuan-Le Zheng , Xin-Cheng He , Wenliang Sun , Ming-Xin Cui , Dahuan Liu , Yun-Lei Hou

Rechargeable sodium-ion batteries (SIBs) are promising low-cost successors to lithium-ion technologies. Yet their commercialization is hindered by anode materials that must accommodate the 35 % larger Na⁺ radius without structural fatigue. Bismuth telluride (Bi₂Te₃), a canonical three-dimensional topological insulator, benefits from topologically protected surface states that enable ultrafast charge transport. Nevertheless, its deployment as an anode active material is impeded by critical shortcomings-large volume excursion, sluggish reaction kinetics, and insufficient intrinsic conductivity. Nanoscale engineering and composite construction have emerged as effective strategies to circumvent these limitations. Herein, a supramolecular Bi₂Te₃@MXene heterostructure is fabricated via electrostatic self-assembly that exploits the topologically protected metallic surface states of nanoscale Bi₂Te₃ and the 2D ionic highways of Ti₃C₂T_x MXene. The architecture enlarges the MXene interlayer spacing, suppressing restacking and lowering the Na⁺ diffusion barrier to 0.28 eV, while the flexible van der Waals interface buffers the volume expansion of Bi₂Te₃. The anode delivers 340.2 mA h g^-1 at 0.1 A g^-1 with a Coulombic efficiency of 98.7 % and 212.2 mA h g^-1 at 1.0 A g^-1, outperforming reported oxide and sulfide analogues. This bidirectional synergism between the topological insulator and MXene provides a general design paradigm for high-rate, long-cycle-life SIB anodes.

可充电钠离子电池（sib）有望成为锂离子技术的低成本接班人。然而，它们的商业化受到阳极材料的阻碍，因为阳极材料必须能够在不产生结构疲劳的情况下容纳更大35%的Na+半径。碲化铋（Bi2Te3）是一种典型的三维拓扑绝缘体，受益于拓扑保护的表面态，可以实现超快电荷传输。然而，它作为阳极活性材料的部署受到一些关键缺点的阻碍——体积偏移大、反应动力学缓慢、固有电导率不足。纳米工程和复合材料结构已经成为规避这些限制的有效策略。本文利用纳米级Bi2Te3的拓扑保护金属表面态和Ti3C2Tx MXene的二维离子高速公路，通过静电自组装制备了超分子Bi2Te3@MXene异质结构。该结构扩大了MXene层间距，抑制了再堆积，并将Na+扩散势垒降低到0.28 eV，而灵活的范德华界面缓冲了Bi2Te3的体积膨胀。该阳极在0.1 A g-1时输出340.2 mA h g-1，库仑效率为98.7%，在1.0 A g-1时输出212.2 mA h g-1，优于已有的氧化物和硫化物类似物。拓扑绝缘体和MXene之间的这种双向协同作用为高速率、长循环寿命SIB阳极提供了一种通用的设计范例。

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引用次数: 0

Machine learning assisted multiphysics simulation for electroplating copper in high aspect ratio through silicon via 机器学习辅助下高纵横比硅孔电镀铜的多物理场模拟

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2026-05-01 Epub Date: 2026-02-16 DOI: 10.1016/j.electacta.2026.148450

Xiaoyue Ding , Wei Li , Yang Xi , Hanwen Cui , Zhaotian Li , Huai Zheng , Yingxia Liu , Xi Tang , Xinlu Teng , Yikang Zhou , Yuzheng Guo , Sheng Liu , Zhaofu Zhang

During the electroplating copper process of through silicon via (TSV), the process induced defects such as voids and seams, which originate from the inappropriate process parameters, critically compromise the structural integrity and long-term reliability of integrated chips. To solve the present challenges, this study integrates the multiphysics finite element simulation method with the machine learning technology to systematically elucidate the regulatory mechanisms of electroplating additives during the filling process. The results indicate that appropriately increasing the concentration of the suppressor can achieve defect-free filling. In further research, to overcome the limitations of experiment and simulation approaches in terms of material consumption and computational demand, this study employed the data-driven machine learning model for rapid and accurate evaluation of electroplating filling quality, achieving a prediction accuracy of up to 98%. This study provides theoretical support for understanding the defect-free electroplating filling mechanisms of high aspect ratio TSV and its intelligent optimization, offering the valuable reference for the three-dimensional (3D) advanced packaging technologies.

在TSV镀铜工艺中，由于工艺参数的不合理而产生的孔洞和接缝等缺陷严重影响了集成芯片的结构完整性和长期可靠性。针对这一挑战，本研究将多物理场有限元模拟方法与机器学习技术相结合，系统阐明电镀添加剂在填充过程中的调控机制。结果表明，适当提高抑制因子的浓度可以实现无缺陷填充。在进一步的研究中，为了克服实验和模拟方法在材料消耗和计算需求方面的局限性，本研究采用数据驱动的机器学习模型对电镀填充质量进行快速准确的评估，预测准确率高达98%。本研究为了解高纵横比TSV无缺陷电镀填充机理及其智能优化提供了理论支持，为三维先进封装技术提供了有价值的参考。

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引用次数: 0