Journal of Electroanalytical Chemistry最新文献_第6页

Hierarchically porous carbon derived from a sol-shaping strategy enabled by lignin-Fe3+ coordination for supercapacitors 分层多孔碳衍生自木质素- fe3 +配位的超级电容器的溶胶成型策略

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-04-01 Epub Date: 2026-01-25 DOI: 10.1016/j.jelechem.2026.119874

Xinxin Niu , Li Bai , Xiuling Xu , Yixian Xue , Zhao Chen , Fujun Wang

The potential of lignin as a sustainable precursor for carbon electrodes is currently hindered by its low reactivity, poor solubility, and the difficulty in synchronously optimizing pore structure and electrical conductivity. In this study, a Fe³⁺ coordination-assisted solvothermal self-assembly strategy was developed to fabricate hierarchical porous carbon from lignin. Through a comprehensive characterization using XPS, XRD, FTIR, and BET techniques, it was confirmed that Fe³⁺ effectively coordinates with the phenolic hydroxyl/carboxyl groups of lignin, leading to a synergistic effect of “metal-induced graphitization” and “self-templating” during the carbonization process. The resulting carbon material exhibited a high specific capacitance of 204 F g⁻¹ at 1 A/g and low charge transfer resistance. Notably, XPS analysis revealed the formation of FeO active sites and surface functional groups after acid washing, further enhancing the electrochemical performance of the material. Capacitance contribution analysis elucidated the charge storage mechanism， showing that the capacitive contribution reached 77.8% at 10 mV s⁻¹ and remained at 91.7% even at 100 mV s⁻¹. Kinetic analysis reveals a dominant surface-controlled pseudocapacitive contribution, which underpins the excellent rate capability with 83.45% retention even at 10 A g⁻¹. This work provides a promising approach for the development of high-performance lignin-based carbon materials. The elucidation of the “structure-energy storage mechanism” relationship offers valuable theoretical insights for the rational design of biomass-derived carbon materials with enhanced electrochemical properties.

目前，木质素作为碳电极的可持续前驱体的潜力受到其低反应性、低溶解度以及难以同步优化孔隙结构和电导率的阻碍。在本研究中，开发了Fe3+配位辅助溶剂热自组装策略，以木质素为原料制备分层多孔碳。通过XPS、XRD、FTIR、BET等技术的综合表征，证实了Fe3+与木质素的酚羟基/羧基有效配位，在炭化过程中产生了“金属诱导石墨化”和“自模板化”的协同效应。所得碳材料在1 a /g时具有204 F g−1的高比电容和低电荷转移电阻。值得注意的是，XPS分析显示，酸洗后形成了FeO活性位点和表面官能团，进一步增强了材料的电化学性能。电容贡献分析表明，在10 mV s−1条件下，电容贡献达到77.8%，在100 mV s−1条件下，电容贡献仍保持在91.7%。动力学分析表明，表面控制赝电容的贡献占主导地位，这支持了即使在10 a g−1下也能保持83.45%的优异速率能力。这项工作为开发高性能木质素基碳材料提供了一条有前途的途径。“结构-能量储存机制”关系的阐明，为合理设计具有增强电化学性能的生物质衍生碳材料提供了有价值的理论见解。

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引用次数: 0

A photoelectrochemical synergistic catalytic three-dimensional electrode system for the treatment of tetracycline pollution in marine wastewater 光电协同催化三维电极系统处理海洋废水中四环素污染

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-04-01 Epub Date: 2026-01-30 DOI: 10.1016/j.jelechem.2026.119858

Yongmin Fu , Hao Wang , Lei Fan , Yifei Zhou , Shengli Zhang , Na Geng , Dayang Yu

The extensive misuse of tetracycline hydrochloride (TCH) in mariculture necessitates effective treatment methods for high-salinity organic wastewater, for which three-dimensional electrode technology holds great promise. By preparing three-dimensional electrode particles with synergistic photo-electrocatalytic capabilities, organic pollutants can be further degraded using solar energy while electrocatalysis was performed, thereby reducing energy consumption. This study prepared a novel photo-electrocatalytic particle electrode using nitrogen-self-doped tea residue biochar as a carrier, loaded with bismuth vanadate (BiVO₄) as a photoactive component, and modified with ferromagnetic materials. A three-dimensional photo-electrocatalytic system was then constructed. The nitrogen in the material provides active sites during the reaction, while BiVO₄ facilitates photogenerated electron transfer under light irradiation, leading to the oxidative degradation of pollutants adsorbed on the material's surface. Under optimal conditions, the system demonstrated excellent photo-electrocatalytic performance for TCH removal (99.01%), and even after five reuse cycles, the removal rate remained above 95%. The research findings provide valuable technical insights for the effective treatment of refractory organic pollutants in high-salinity wastewater.

盐酸盐四环素在海水养殖中的广泛滥用，需要有效的高盐度有机废水处理方法，三维电极技术在这方面具有广阔的应用前景。通过制备具有协同光电催化能力的三维电极颗粒，可以在电催化的同时利用太阳能进一步降解有机污染物，从而降低能耗。本研究以氮自掺杂茶渣生物炭为载体，负载钒酸铋（BiVO4）作为光活性组分，并用铁磁材料修饰制备了一种新型的光电催化颗粒电极。构建了三维光电催化体系。材料中的氮在反应过程中提供活性位点，而BiVO4在光照射下促进光生电子转移，导致吸附在材料表面的污染物氧化降解。在最佳条件下，该系统对TCH的光电催化去除率达到99.01%，即使经过5次重复使用，去除率仍保持在95%以上。研究结果为高盐度废水中难降解有机污染物的有效处理提供了有价值的技术见解。

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引用次数: 0

Hierarchical nanoarchitectonics of porous carbon from rice straw via K2CO3-activation for high-energy symmetric supercapacitors 利用k2co3活化稻草多孔碳制备高能对称超级电容器的分级纳米结构

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-04-01 Epub Date: 2026-01-28 DOI: 10.1016/j.jelechem.2026.119887

Zhe Chen , Haibo Huang , Mingxi Li , Yibo Zhao , Ming Li , Ting Zeng

Hierarchically porous carbon is synthesized from rice straw biomass using controlled K₂CO₃ activation for advanced supercapacitor applications. The optimal material, activated rice straw-based biomass carbon (ARBBC)-8, exhibits an expanded interlayer spacing of 3.98 Å, an enhanced defect density (I_d/I_g) of 0.98, and a micro-mesoporous architecture with a 993 m² g⁻¹ specific surface area. X-ray photoelectron spectroscopy (XPS) analysis confirms the presence of electrochemically active N/O functionalities, including pyridinic nitrogen (398.3 eV) and carbonyl groups (532.6 eV), which enable dual energy storage mechanisms. In a three-electrode configuration (6 M KOH), ARBBC-8 delivers a specific capacitance of 392 F g⁻¹ at 2 A g⁻¹ with 50% rate retention at 20 A g⁻¹. The symmetric supercapacitor achieves an energy density of 22.09 Wh kg⁻¹ at 1470 W kg⁻¹, surpassing most aqueous biomass-derived carbon systems. The capacitance retention of 97.6% and Coulombic efficiency of 99.7% after 10,000 cycles demonstrate remarkable cycling stability. This study utilizes synergistic pore-structure engineering and heteroatom functionality optimization to establish rice straw as a sustainable precursor for high-performance energy storage materials.

利用可控的K2CO3活化，从稻草生物质中合成了分层多孔碳，用于高级超级电容器的应用。最优材料为活性稻草基生物质碳(ARBBC)-8，其层间距扩大为3.98 Å，缺陷密度（Id/Ig）增强为0.98，微介孔结构具有993 m2 g−1的比表面积。x射线光电子能谱（XPS）分析证实了电化学活性N/O官能团的存在，包括吡啶氮（398.3 eV）和羰基（532.6 eV），它们能够实现双重能量存储机制。在三电极配置（6 M KOH）中，arbc -8在2 a g−1时提供392 F g−1的特定电容，在20 a g−1时保持50%的速率。对称超级电容器在1470 W kg - 1时的能量密度为22.09 Wh kg - 1，超过了大多数水性生物质衍生碳系统。1万次循环后电容保持率为97.6%，库仑效率为99.7%，具有良好的循环稳定性。本研究利用协同孔隙结构工程和杂原子功能优化来建立水稻秸秆作为高性能储能材料的可持续前体。

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引用次数: 0

A porphyrazine-based sensor for nitrite detection 一种基于卟啉嗪的亚硝酸盐检测传感器

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-04-01 Epub Date: 2026-01-27 DOI: 10.1016/j.jelechem.2026.119881

Leonardo M.A. Ribeiro , Douglas P.M. Saraiva , Hiago N. Silva , Marcos M. Toyama , Sergio H. Toma , Bruno L. Hennemann , Koiti Araki , Henrique E. Toma , Mauro Bertotti

Nitrite plays a critical role in environmental, food, and biomedical systems; however, its fast and reliable quantification remains challenging due to the limitations of conventional analytical methods. Specifically, traditional methods are often time-consuming, require complex instrumentation, and are unsuitable for field applications. Herein, we report the development of a highly sensitive electrochemical sensor based on a novel supramolecular porphyrazine complex, Tetraruthenated Tetra(pyridyl)Porphyrazine Cobalt (CoTPyPzTRu). This complex was successfully synthesized, characterized by MALDI/TOF/MS, and immobilized onto a platinum microfiber (25 μm diameter) via dip-coating. Morphological analysis by SEM/EDS confirmed the formation of a homogeneous CoTPyPzTRu layer covering the microfiber surface. Electrochemically, the CoTPyPzTRu-modified electrode demonstrated a significantly enhanced electrocatalytic response toward nitrite oxidation, with a steady increase in current compared to the bare electrode. The sensor's practical utility was validated in some matrices, including tap water, algae medium, and artificial saliva, using the standard addition method. The amperometric results showed an excellent correlation (R² = 0.998) with the gold-standard Griess method. Furthermore, recovery tests in spiked samples confirmed the sensor's outstanding accuracy and reliability, showing recovery values as 55 ± 2 μmol L⁻¹ (spiked: 50 μmol L⁻¹) for tap water, 102 ± 7 μmol L⁻¹ (spiked: 100 μmol L⁻¹) for algae medium, and 150 ± 10 μmol L⁻¹ (spiked: 150 μmol L⁻¹) for artificial saliva. This work demonstrated the CoTPyPzTRu-modified microfiber as a robust, sensitive, and practical platform for nitrite quantification, offering a promising alternative for rapid analysis in diverse environmental and biological applications.

亚硝酸盐在环境、食品和生物医学系统中起着关键作用；然而，由于传统分析方法的局限性，其快速可靠的定量仍然具有挑战性。具体来说，传统方法通常耗时，需要复杂的仪器，并且不适合现场应用。在此，我们报告了一种基于新型超分子卟啉配合物，四aruthenated Tetra(pyridyl) porphyrazine Cobalt （CoTPyPzTRu）的高灵敏度电化学传感器的开发。通过MALDI/TOF/MS对该配合物进行了表征，并通过浸渍涂层将其固定在直径为25 μm的铂微纤维上。SEM/EDS形貌分析证实了在微纤维表面形成了均匀的CoTPyPzTRu层。电化学上，cotpypzru修饰电极对亚硝酸盐氧化的电催化反应显著增强，与裸电极相比，电流稳定增加。采用标准的添加方法，在自来水、藻类培养基和人工唾液等基质中验证了该传感器的实用性。安培结果与金标准Griess法具有良好的相关性（R2 = 0.998）。此外，对加标样品的回收率测试证实了该传感器具有良好的准确性和可靠性，自来水的回收率为55±2 μmol L−1（加标为50 μmol L−1），藻类培养基的回收率为102±7 μmol L−1（加标为100 μmol L−1），人工唾液的回收率为150±10 μmol L−1（加标为150 μmol L−1）。这项工作证明了cotpypztruu修饰的微纤维是一种可靠、敏感和实用的亚硝酸盐定量平台，为各种环境和生物应用的快速分析提供了一种有前途的选择。

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引用次数: 0

Weakly solvating electrolyte enables robust LiF-rich interphase to stabilize SnO2-based anode toward Li storage at low temperature 弱溶剂化电解质使富lif界面在低温下稳定sno2基阳极的锂存储

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-04-01 Epub Date: 2026-01-27 DOI: 10.1016/j.jelechem.2026.119877

Yongbo Cui , Yazhou Zhang , Yu Qin , Cheng Wang , Xuan Liu , Yingmin Liu , Wenxia Chen , Meng Liu , Fei Li , Wei Wei

Tin dioxide (SnO₂) is a promising anode material for lithium-ion batteries (LIBs). However, SnO₂ suffers from severe agglomeration and significant volume expansion during cycling. Moreover, the sluggish kinetics at low temperatures further exacerbate the performance fade. Herein, we designed a weakly solvating localized high-concentration salt electrolyte (2 M LiFSI in THF: TTE, denoted as LTT-2). The designed electrolyte exhibited high ionic conductivity and facilitated the formation of a robust LiF-rich solid electrolyte interphase (SEI). This SEI architecture significantly enhanced the structural stability and electrochemical performance of the SnO₂/graphene composite anode (SnO₂/GA). Specifically, in LTT-2 electrolyte, the SnO₂/GA maintained a capacity of 605.7 mAh g⁻¹ after 100 cycles at a current density of 0.5C (1C = 782 mA g⁻¹). At −30 °C, it retained a discharge specific capacity of 411.3 mAh g⁻¹ after 100 cycles (0.1C), with a capacity retention rate as high as 81.1%. This work demonstrates a viable strategy for stabilizing SnO₂-based anodes for Li storage under low temperature conditions.

二氧化锡（SnO2）是一种很有前途的锂离子电池负极材料。然而，SnO2在循环过程中会发生严重的结块和明显的体积膨胀。此外，低温下缓慢的动力学进一步加剧了性能衰退。本文设计了一种弱溶剂化局部高浓度盐电解质（2 M LiFSI in THF: TTE，记为LTT-2）。所设计的电解质具有高离子电导率，有利于形成坚固的富锂固体电解质界面（SEI）。这种SEI结构显著提高了SnO2/石墨烯复合阳极（SnO2/GA）的结构稳定性和电化学性能。具体而言，在LTT-2电解质中，在0.5C （1C = 782 mA g - 1）电流密度下，SnO2/GA在100次循环后保持605.7 mAh g - 1的容量。在−30°C下，经过100次循环（0.1C）后，其放电比容量保持在411.3 mAh g−1，容量保持率高达81.1%。这项工作证明了在低温条件下稳定sno2基锂存储阳极的可行策略。

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引用次数: 0

Facile Aptasensor with enhanced electrochemiluminescence by nanozyme in nanoporous silica film for highly sensitive detection of carbohydrate antigen 15–3 纳米孔二氧化硅膜纳米酶增强电化学发光的易变适配体传感器用于碳水化合物抗原15-3的高灵敏度检测

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-04-01 Epub Date: 2026-01-30 DOI: 10.1016/j.jelechem.2026.119896

Liuyi Huang, Xinhui Gu, Fengna Xi

Establishing sensitive detection method for carbohydrate antigen 15–3 (CA15–3) is of great significance for the early diagnosis and therapeutic monitoring of breast cancer. Herein, an electrochemiluminescence (ECL) sensor was fabricated by growing Co₃O₄ nanoparticles in-situ within nanochannels and employing a signal gating strategy, achieving highly sensitive detection of CA15–3. Using simple Stöber method, a silica nanochannel film (SNF) was deposited onto an indium tin oxide (ITO) glass electrode. This two-dimensional (2D) nanoporous silica film provided a confined space, within which Co₃O₄ nanozymes were synthesized in situ. Co₃O₄ served as a peroxidase (POD)-mimic nanozyme, enabling the catalytic conversion of hydrogen peroxide (H₂O₂) into reactive oxygen species (ROS). Functioning as a nanocatalyst, Co₃O₄ remarkedly enhanced the electrochemical oxidation of luminol, thereby boosting the ECL signal. This dual enhancement mechanism enabled the sensor to achieve high luminol-based ECL signal. The bio-recognition interface was constructed by functionalizing the outer surface of SNF with silane coupling agents and immobilizing aptamers. A measurable decrease in the ECL signal was generated due to the hindered diffusion of the emitter and co-reactant and increased interfacial resistance, which occurred when the aptamer-CA15–3 complex formed on the electrode surface. This response allowed for the quantification of CA15–3. Under optimal conditions, the developed aptasensor can detect CA15–3 in the range of 0.1 to 10,000 mU/mL, with a limit of detection of 26 μU/mL. Owing to its merits of simple fabrication, rapid analysis, high sensitivity, good reproducibility, and excellent selectivity, the developed immunosensor holds great potential for clinical diagnostics of tumor biomarkers.

建立碳水化合物抗原15-3 （CA15-3）的灵敏检测方法对乳腺癌的早期诊断和治疗监测具有重要意义。本文通过在纳米通道内原位生长Co3O4纳米颗粒并采用信号门控策略制备了电化学发光（ECL）传感器，实现了对CA15-3的高灵敏度检测。采用Stöber方法，将二氧化硅纳米通道膜（SNF）沉积在氧化铟锡玻璃电极上。这种二维（2D）纳米多孔二氧化硅薄膜提供了一个密闭空间，在该空间内原位合成了Co3O4纳米酶。Co3O4作为过氧化物酶（POD）模拟纳米酶，能够催化过氧化氢（H2O2）转化为活性氧（ROS）。Co3O4作为纳米催化剂，再次显著增强了鲁米诺的电化学氧化，从而增强了ECL信号。这种双重增强机制使传感器能够实现基于发光二极管的高ECL信号。利用硅烷偶联剂和固定化适配体对SNF外表面进行功能化，构建了生物识别界面。当适体- ca15 - 3络合物在电极表面形成时，由于发射极和共反应物的扩散受阻，界面电阻增加，产生了可测量的ECL信号下降。这一反应使CA15-3的定量成为可能。在最佳条件下，该传感器对CA15-3的检测范围为0.1 ~ 10000 μU/mL，检出限为26 μU/mL。该免疫传感器具有制作简单、分析快速、灵敏度高、重现性好、选择性好等优点，在肿瘤生物标志物的临床诊断中具有很大的潜力。

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引用次数: 0

2T-Si/Sb2S3 tandem solar cell: Impedance spectroscopic and electrical circuit analysis 2T-Si/Sb2S3串联太阳能电池：阻抗光谱和电路分析

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-04-01 Epub Date: 2026-01-30 DOI: 10.1016/j.jelechem.2026.119895

Atish Kumar Sharma , Ritesh Kumar Chourasia , Nitesh K. Chourasia , Keyur Sangani

In the advancement toward sustainable energy solutions, solar power plays a pivotal role among renewable energy technologies. However, conventional single-junction solar cells are constrained by their intrinsic narrow bandgap, resulting in substantial energy losses specifically, thermalization losses from high-energy photons and transmission losses from low-energy photons. To address these limitations, tandem solar cells offer a promising alternative by enabling the absorption of a wider portion of the solar spectrum, thereby significantly mitigating both thermal and absorption-related losses. This study presents a comprehensive analysis of a two-terminal (2 T) tandem solar cell architecture utilizing impedance spectroscopy and equivalent circuit modelling. Using SCAPS-1d, the standalone top cell (Sb₂S₃) and bottom cell (Si) cells are demonstrated. The EIS analyser is used for fitting the equivalent circuit corresponding to the frequency-dependent impedance data for the top and bottom cells. The characterization of top and bottom cells is done exclusively based on the capacitance-frequency (CF), capacitance-voltage (CV), Mott-Schottky (M-S), and Nyquist plots. The impedance spectroscopy data of both cells confirms their suitability as top and bottom cells for the 2 T tandem design.

在实现可持续能源解决方案的过程中，太阳能在可再生能源技术中起着举足轻重的作用。然而，传统的单结太阳能电池受到其固有窄带隙的限制，导致大量的能量损失，特别是高能光子的热化损失和低能光子的传输损失。为了解决这些限制，串联太阳能电池提供了一种有前途的替代方案，可以吸收更广泛的太阳光谱，从而显著减轻热损失和吸收相关损失。本研究利用阻抗谱和等效电路建模对双端串联太阳能电池结构进行了全面分析。使用SCAPS-1d，展示了独立的顶单元（Sb2S3）和底单元（Si）。EIS分析仪用于拟合与顶部和底部单元的频率相关阻抗数据相对应的等效电路。顶部和底部电池的表征完全基于电容频率（CF），电容电压（CV），莫特-肖特基（M-S）和奈奎斯特图。两个电池的阻抗谱数据证实了它们作为顶部和底部电池在2t串联设计中的适用性。

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引用次数: 0

Hierarchical porous carbon aerogel with enhanced Pseudocapacitance for high-performance zinc-ion hybrid capacitors 具有增强赝电容的分级多孔碳气凝胶用于高性能锌离子杂化电容器

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-04-01 Epub Date: 2026-01-30 DOI: 10.1016/j.jelechem.2026.119906

Youyu Zhu , Zonglin You , Xiaofang Tang , Yixi Zhang , Zheng Liu , Mingyu Wei , Yuanyuan Ma , Qi Liu , Yingfeng Duan , Jin Wang , Xue Wang , Yating Zhang

Zinc-ion hybrid capacitors (ZIHCs) have been considered as one of promising energy storage devices balancing the energy and power output. Constructing high-capacity cathode materials to match the Zn anode is crucial to improve the overall performance of ZIHCs. Herein, using coal-based humic acid as carbon precursor and carboxymethyl cellulose (CMC) as structure-directing reagent, an oxygen self-doped porous carbon aerogels (CAs) was fabricated via hydrogen bond-driven strategy. The resulting carbon aerogel with three-dimensional network structure constructed by carbon nanosheet can not only maximize the utilization of active sites, but also facilitate the ion storage and transport. Furthermore, the CO groups on the carbon aerogel surface further enhance the capacitance via pseudocapacitive reaction. Consequently, the assembled ZIHCs based on the carbon aerogel achieves an exhibits outstanding rate capability, delivering a reversible capacity of 131.8 mAh g⁻¹ at a high current density of 10 A g⁻¹ and ultra-high energy density of 211.5 Wh kg⁻¹ (at 74.45 W kg⁻¹). Systematic investigations reveal that the excellent electrochemical performance originates from the physical adsorption and the chemical adsorption of zinc ions. This study provides a novel approach for the fabrication of carbon-based cathodes in ZIHCs.

锌离子混合电容器（zihc）被认为是一种很有前途的平衡能量和功率输出的储能器件。构建与Zn阳极匹配的高容量正极材料是提高zihc整体性能的关键。本文以煤基腐植酸为碳前驱体，羧甲基纤维素（CMC）为结构导向剂，采用氢键驱动策略制备了氧自掺杂多孔碳气凝胶（CAs）。由碳纳米片构建的三维网状结构的碳气凝胶不仅可以最大限度地利用活性位点，而且有利于离子的储存和运输。此外，碳气凝胶表面的CO基团通过赝电容反应进一步提高了电容量。因此，基于碳气凝胶组装的zihc具有出色的速率能力，在10 a g−1的高电流密度下可提供131.8 mAh g−1的可逆容量和211.5 Wh kg−1的超高能量密度（74.45 W kg−1）。系统的研究表明，优异的电化学性能源于锌离子的物理吸附和化学吸附。本研究为在zihc中制备碳基阴极提供了一种新的方法。

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引用次数: 0

High-performance anode material carbon-coated WS2 for lithium and sodium ion battery 锂钠离子电池用高性能碳包覆负极材料WS2

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-04-01 Epub Date: 2026-01-29 DOI: 10.1016/j.jelechem.2026.119891

Miao Jiang , Yi-Han Gui , Ying-Jin Zhao , Luan Fang , Song-Lin Tian , San-Long Wang , Ji Li , Li-Min Chang

With the rapid advancement of society and economic development, the demand for advanced energy storage solutions has increased significantly. Secondary batteries have emerged as a focal point in renewable energy research due to their environmental sustainability and portability. In particular, lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) have been widely adopted owing to their high energy density. This study successfully synthesized tungsten disulfide (WS₂) nanosheets using a two-step solid-phase method and prepared a series of carbon-coated WS₂ composites (C-WS₂-n) through dopamine modification and high-temperature carbonization. The carbon coating method effectively enhances the cycling stability of WS₂. Electrochemical tests demonstrated that the C-WS₂-n composites, used as anode materials for lithium/sodium-ion batteries, significantly improved conductivity and structural stability, effectively mitigating volume changes during charge and discharge cycles. Among them, the C-WS₂-0.5 material still maintains a discharge specific capacity of 338.9 mAh g⁻¹ after 500 cycles in LIBs and 68.8 mAh g⁻¹ after 500 cycles in SIBs, it exhibited the most outstanding rate performance and cycling stability in both LIBs and SIBs and shown particularly high practical potential in LIBs. This research provides an effective modification strategy for the application of transition metal sulfides in secondary batteries.

随着社会经济的快速发展，对先进储能解决方案的需求显著增加。二次电池因其环境可持续性和便携性而成为可再生能源研究的热点。特别是锂离子电池（LIBs）和钠离子电池（SIBs）由于其高能量密度而被广泛采用。本研究采用两步固相法成功合成了二硫化钨（WS2）纳米片，并通过多巴胺修饰和高温碳化制备了一系列碳包覆WS2复合材料（C-WS2-n）。碳包覆法有效地提高了WS2的循环稳定性。电化学测试表明，C-WS2-n复合材料作为锂/钠离子电池的负极材料，显著提高了电池的导电性和结构稳定性，有效地缓解了充放电循环过程中的体积变化。其中，C-WS2-0.5材料在lib中500次循环后仍保持338.9 mAh g−1的放电比容量，在sib中500次循环后仍保持68.8 mAh g−1的放电比容量，在lib和sib中都表现出最突出的倍率性能和循环稳定性，在lib中显示出特别高的实用潜力。本研究为过渡金属硫化物在二次电池中的应用提供了一种有效的改性策略。

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引用次数: 0

Cobalt-based metal-organic framework derived 3D interconnected NiCo2S4 nanoparticles network architectures for high-performance supercapacitors 钴基金属有机框架衍生的高性能超级电容器三维互联NiCo2S4纳米颗粒网络结构

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-04-01 Epub Date: 2026-01-23 DOI: 10.1016/j.jelechem.2026.119843

Naifeng Zhang , Yanli Chen , Yanrong Zhang , Xinyu Lv , Dan Wang , Wenchang Wang , Jie Wang , Xiaojiao Du , Naotoshi Mitsuzaki , Zhidong Chen

The practical deployment of transition metal sulfides in supercapacitors is constrained by intrinsic limitations including nanoparticle agglomeration, low active-site utilization, and inadequate rate performance. To circumvent the intrinsic constraints of transition metal sulfide electrodes, employing metal-organic framework (MOF) as a sacrificial template to construct well-defined nanostructures represents a highly effective strategy. In this contribution, we successfully construct three-dimensional (3D) interconnected NiCo₂S₄ nanoparticles network with abundant active sites by simple co-precipitation, ion exchange and subsequent sulfidation processes. The influence of sulfurization temperature and sulfurization duration on the electrochemical performance was systematically investigated. The rational design prevents the aggregation of NiCo₂S₄ nanoparticles, enables the resulting 3D interconnected network structure has high specific surface area and a larger number of active sites and excellent structural stability to enhance the electrochemical performance. The as-fabricated NiCo₂S₄/NF-120(6) electrode exhibits an outstanding specific capacitance of 1232C g⁻¹ at 1 A g⁻¹, along with a satisfactory capacitance retention of 72.94% when tested at 5 A g⁻¹ after 5000 cycles. Furthermore, the asymmetric supercapacitor (ASC) device achieves a high energy density of 28.58 Wh kg⁻¹ at a power density of 800 W kg⁻¹, accompanied by a maximum power density of 8000 W kg⁻¹. Notably, the ASC device also demonstrates a favorable capacity retention of 94.45% after 10,000 cycles. These results collectively confirm the practical application potential of the 3D interconnected nanoparticle network in advanced energy storage systems.

过渡金属硫化物在超级电容器中的实际应用受到纳米颗粒团聚、活性位点利用率低和速率性能不足等内在限制的制约。为了规避过渡金属硫化物电极的固有限制，采用金属有机框架（MOF）作为牺牲模板来构建定义良好的纳米结构是一种非常有效的策略。在这篇论文中，我们通过简单的共沉淀、离子交换和随后的硫化过程，成功构建了具有丰富活性位点的三维（3D）互联NiCo2S4纳米颗粒网络。系统地研究了硫化温度和硫化时间对电化学性能的影响。合理的设计防止了NiCo₂S₄纳米颗粒的聚集，使所得到的三维互联网络结构具有较高的比表面积和较多的活性位点以及优异的结构稳定性，从而提高了电化学性能。制备的NiCo₂S₄/NF-120(6)电极在1 A g−1条件下的比电容为1232C g−1，在5 A g−1条件下经过5000次循环测试，电容保持率为72.94%。此外，非对称超级电容器（ASC）器件在800w kg - 1的功率密度下实现了28.58 Wh kg - 1的高能量密度，最大功率密度为8000w kg - 1。值得注意的是，ASC装置在10,000次循环后也显示出良好的容量保持率为94.45%。这些结果共同证实了三维互联纳米粒子网络在先进储能系统中的实际应用潜力。

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