Journal of Electroanalytical Chemistry最新文献_第10页

Research progress on doping modification of lithium-rich manganese-based layered oxide cathode materials 富锂锰基层状氧化物正极材料掺杂改性研究进展

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-03-01 Epub Date: 2026-01-06 DOI: 10.1016/j.jelechem.2026.119795

Yiqi Zheng , Yingjie Ji , Zhen Zhang , Yi Yao , Yi Zhang , Zhoulu Wang , Xiang Liu

With the development of society, lithium-ion batteries are facing higher demands for energy density from electric vehicles, consumer (3C) electronic products, energy storage devices, and other applications. Lithium-rich manganese-based cathode materials have advantages such as high specific capacity (≈ 250 mAh g⁻¹), high operating voltage (≈ 3.6 V), and low cost, making them promising candidates for the next generation of commercial high-specific-energy batteries. However, this material has many problems, such as lattice oxygen evolution, transition metal ion migration, low initial Coulombic efficiency, voltage and capacity fade, and interfacial side reactions, which limit its commercial application. This paper reviews the latest research progress on the doping of lithium-rich manganese-based cathode materials, focusing on aspects such as synthesis methods, reaction mechanisms, and electrochemical properties. Research shows that ion doping can significantly improve the electrochemical performance of lithium-rich manganese-based cathode materials. Finally, the doping directions of lithium-rich manganese-based cathode materials are prospected.

随着社会的发展，电动汽车、消费类（3C）电子产品、储能设备等应用对锂离子电池的能量密度提出了更高的要求。富锂锰基正极材料具有高比容量（≈250 mAh g−1）、高工作电压（≈3.6 V）和低成本等优点，是下一代商用高比能电池的理想候选者。然而，该材料存在晶格析氧、过渡金属离子迁移、初始库仑效率低、电压和容量衰减、界面副反应等问题，限制了其商业应用。本文综述了富锂锰基正极材料掺杂的最新研究进展，重点从合成方法、反应机理、电化学性能等方面进行了综述。研究表明，离子掺杂可以显著提高富锂锰基正极材料的电化学性能。最后对富锂锰基正极材料的掺杂方向进行了展望。

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引用次数: 0

Ce3+ doping modulates low-spin Fe active sites and sodium-ion diffusion kinetics to enhance Prussian blue cathode performance Ce3+掺杂调节低自旋铁活性位点和钠离子扩散动力学，提高普鲁士蓝阴极性能

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-02-15 Epub Date: 2026-01-05 DOI: 10.1016/j.jelechem.2026.119792

Binghong Li , Fuliang Zhu , Yanshuang Meng

Iron-based Prussian blue (FeHCF) have garnered significant attention as cathode materials for sodium-ion batteries due to their high theoretical capacity and open 3D framework. However, their practical performance is severely limited by the shielding of low-spin Fe (Fe^LS) active sites due to Fe(CN)₆ vacancies and crystalline water, as well as sluggish kinetics resulting from their semiconducting nature. This study proposes a cerium (Ce³⁺) doping strategy that significantly enhances the sodium storage performance of FeHCF through a dual mechanism of defect repair and electronic modulation. Experimental results demonstrate that Ce³⁺ doping not only fills [Fe(CN) ₆] vacancies and repels crystalline water, thereby reactivating the shielded Fe^LS active sites (increasing capacity contribution from 22.98 mAh g⁻¹ to 47.8 mAh g⁻¹), but also elevates the Fermi-level density of states via 4f-3d orbital hybridization, endowing the material with quasi-metallic characteristics. The optimized FeHCF-5 material delivers a reversible capacity of 120.6 mAh g⁻¹, maintains 88.5 mAh g⁻¹ at a high current density of 500 mA g⁻¹, and achieves a capacity retention of 80.4 % after 200 cycles. Combined with theoretical calculations, this work reveals that Ce³⁺ doping synergistically optimizes electron conduction and ion diffusion kinetics by reducing the sodium-ion diffusion energy barrier (from 0.356 eV to 0.19 eV) and widening ion transport channels (the Na⁺ diffusion coefficient increases by 14.14-fold to 5.373 × 10⁻⁹ cm² s⁻¹). This study provides new insights for designing high-performance sodium storage materials.

铁基普鲁士蓝（FeHCF）作为钠离子电池的正极材料，由于其高理论容量和开放的三维结构而备受关注。然而，由于Fe(CN)6空位和结晶水对低自旋Fe（FeLS）活性位点的屏蔽，以及半导体性质导致的缓慢动力学，它们的实际性能受到严重限制。本研究提出了一种铈（Ce3+）掺杂策略，通过缺陷修复和电子调制双重机制显著提高FeHCF的储钠性能。实验结果表明，Ce3+的掺杂不仅填补了[Fe(CN) 6]空位并排斥晶水，从而使屏蔽的FeLS活性位点重新激活（容量贡献从22.98 mAh g−1增加到47.8 mAh g−1），而且通过4f-3d轨道杂化提高了费米能级密度，赋予材料准金属特性。优化后的FeHCF-5材料的可逆容量为120.6 mAh g−1，在500 mA g−1的高电流密度下保持88.5 mAh g−1，在200次循环后容量保持率为80.4%。结合理论计算，Ce3+掺杂通过降低钠离子扩散能垒（从0.356 eV降低到0.19 eV）和扩大离子传输通道（Na+扩散系数增加14.14倍，达到5.373 × 10−9 cm2 s−1），协同优化了电子传导和离子扩散动力学。该研究为设计高性能钠存储材料提供了新的思路。

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引用次数: 0

Melanin-driven heteroatom incorporation in bird feather-derived activated carbon for high-performance supercapacitors 用于高性能超级电容器的鸟羽毛衍生活性炭中黑色素驱动的杂原子掺入

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-02-15 Epub Date: 2025-12-30 DOI: 10.1016/j.jelechem.2025.119777

Kapil Dev Verma , Kamal K. Kar

In the rapidly advancing field of energy storage, the integration of sustainable materials with superior performance metrics has become essential. Bird feathers, an abundant byproduct of poultry and domestic waste, are largely underutilised and contribute to environmental concerns due to their resistance to degradation. Composed of β-keratin and melanin pigments, feathers offer a unique opportunity for sustainable conversion into value-added carbon materials. In this study, feathers of three distinct colours, black (crow), grey (peacock), and white (duck), were employed as precursors for activated carbon electrodes to evaluate the role of melanin concentration on heteroatom incorporation and electrochemical performance. The prepared activated carbons demonstrated a strong correlation between pigmentation and specific capacitance, attributed to melanin-induced nitrogen and oxygen functionalities. The symmetric supercapacitors delivered specific capacitances of 361 ± 10 F g⁻¹ for crow feather-derived carbon, 384 ± 2.5 F g⁻¹ for peacock feather-derived carbon, and 341 ± 9 F g⁻¹ for duck feather-derived carbon at 1 A g⁻¹ in 6 M KOH electrolyte. These findings establish bird feathers as a sustainable carbon precursor and highlight the critical role of melanin content in enhancing electrochemical charge storage, thereby offering a pathway for environmentally benign and high-performance supercapacitor electrode materials.

在快速发展的能源存储领域，具有卓越性能指标的可持续材料的集成已成为必不可少的。鸟类羽毛是家禽和家庭废物的大量副产品，但由于它们不易降解，因此在很大程度上未得到充分利用，并引起环境问题。羽毛由β-角蛋白和黑色素组成，为可持续转化为增值碳材料提供了独特的机会。本研究采用黑色（乌鸦）、灰色（孔雀）和白色（鸭子）三种不同颜色的羽毛作为活性炭电极的前驱体，以评估黑色素浓度对杂原子掺入和电化学性能的影响。所制备的活性炭在色素沉着和比电容之间表现出很强的相关性，这归因于黑色素诱导的氮和氧官能团。在6 M KOH电解液中，在1 A g−1条件下，乌鸦羽毛衍生碳的比电容为361±10 F g−1，孔雀羽毛衍生碳的比电容为384±2.5 F g−1，鸭羽毛衍生碳的比电容为341±9 F g−1。这些发现证实了鸟羽毛是一种可持续的碳前体，并强调了黑色素含量在增强电化学电荷存储方面的关键作用，从而为环保和高性能的超级电容器电极材料提供了途径。

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引用次数: 0

Construction of defect-engineered ZnS/BP to form S-vacancy heterojunction catalyst for the electrocatalytic reduction of N2 to NH3 构建缺陷工程ZnS/BP形成s -空位异质结催化剂用于电催化还原N2制NH3

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-02-15 Epub Date: 2025-12-25 DOI: 10.1016/j.jelechem.2025.119758

Shaona Chen , Tianwei Liang , Demiao Fang , Jie Qin , Rengui Weng , Zhongxu Dai

This paper successfully synthesized a new type of heterojunction material (Vs-ZnS/BP), which is composed of black phosphorus nanosheets and S vacancy defective ZnS nanoparticles. The results show that this material directly possesses a heterojunction, which can effectively enhance the electrocatalytic activity. In 0.1 M Na₂SO₄, the ammonia production rate of the newly prepared catalyst reaches 48.2 μgh⁻¹mgcat⁻¹ at −0.5 V (vs. RHE), and the Faraday efficiency reaches 33.39% at −0.2 V (vs. RHE). Through DFT calculations, it is proved that the introduction of S vacancies provides reaction sites for the N₂-NH₃ conversion and can also activate the N₂ molecule. Compared with black phosphorus, the heterojunction composite material significantly improves the ammonia synthesis yield and Faraday efficiency.

本文成功地合成了一种新型异质结材料（Vs-ZnS/BP），该材料由黑磷纳米片和S空位缺陷ZnS纳米颗粒组成。结果表明，该材料直接具有异质结，可以有效地提高电催化活性。在0.1 M Na2SO4条件下，在- 0.5 V （vs. RHE）下，新制备的催化剂制氨率达到48.2 μgh−1mgcat−1，在- 0.2 V （vs. RHE）下，法拉第效率达到33.39%。通过DFT计算，证明了S空位的引入为N2- nh3转化提供了反应位点，也可以激活N2分子。与黑磷相比，该异质结复合材料显著提高了合成氨收率和法拉第效率。

引用次数: 0

Synthesis and electrochemical performance of phenylamine tin chloride nanocrystals/reduced graphene oxide (PhASn2Cl5 NCs/rGO) nanocomposite-based electrode materials for advanced supercapacitors 先进超级电容器用苯胺氯化锡纳米晶/还原氧化石墨烯纳米复合电极材料的合成及电化学性能

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-02-15 Epub Date: 2025-12-28 DOI: 10.1016/j.jelechem.2025.119774

Nitin , Milan Kumar Bera , Gajal Singla , Soumen Basu , Kumar Venkatesan , Manickam Selvaraj , Nikhil Kumar , S. Chakrabarti

Large organic cation-based metal halide hybrid perovskites have emerged as promising next-generation materials for energy storage, offering a less toxic alternative to conventional inorganic halides. Herein, we report the synthesis and electrochemical evaluation of zero-dimensional phenylamine tin chloride (PhASn₂Cl₅) nanocrystals (NCs) and their reduced graphene oxide (rGO) nanocomposite (PhASn₂Cl₅/rGO) as supercapacitor electrodes. The NCs were prepared via a facile hydrothermal method, yielding an average particle size of ∼31 nm and crystallizing in a tetragonal AB₂X₅ (I4/cm) structure with high crystallinity and negligible lattice strain. HRTEM and SAED confirm phase purity, while TGA indicates thermal stability up to ∼325 °C. Dielectric and electrical modulus analyses reveal strong interfacial polarization, non-Debye relaxation, and bulk-dominated charge transport, with high ion diffusion (1.8 × 10⁻⁶ m²·s⁻¹) and mobility (∼7.13 × 10⁻⁵ m²·V⁻¹·s⁻¹). Electrochemical studies demonstrate hybrid capacitive behavior, combining electric double-layer capacitance (EDLC) and pseudocapacitance, with low internal resistance, excellent cyclic stability (95% capacitance retention), and a specific capacitance of ∼3.9 F·g⁻¹ at 20 mV·s⁻¹. The PhASn₂Cl₅/rGO nanocomposite exhibits enhanced performance, achieving an energy density of 3.28 Wh·kg⁻¹ and a power density of 342.86 W·kg⁻¹ at 3 mA·cm⁻². Kinetic analysis indicates diffusion-controlled processes dominate at low scan rates (∼96% at 0.02 V·s⁻¹), while capacitive contributions increase at higher rates (∼12% at 0.2 V·s⁻¹), suggesting a synergistic mechanism where rGO provides EDLC and PhASn₂Cl₅ NCs contribute pseudocapacitance. A prototype solid-state supercapacitor successfully powered LEDs, demonstrating the practical applicability of these materials in next-generation energy storage devices.

大型有机阳离子金属卤化物杂化钙钛矿已成为有前途的下一代储能材料，为传统无机卤化物提供了毒性更小的替代品。在此，我们报告了零维苯胺氯化锡（PhASn₂Cl₅）纳米晶体（NCs）及其还原氧化石墨烯（rGO）纳米复合材料（PhASn₂Cl₅/rGO）作为超级电容器电极的合成和电化学评价。NCs是通过简单的水热方法制备的，产生平均粒径为~ 31 nm，并在具有高结晶度和可忽略晶格应变的四边形AB₂X₅（I4/cm）结构中结晶。HRTEM和SAED证实了相纯度，而TGA表明热稳定性高达~ 325°C。介电模量和电模量分析显示了强的界面极化、非debye弛豫和块体主导的电荷输运，具有高离子扩散（1.8 × 10−6 m2·V−1）和迁移率（~ 7.13 × 10−5 m2·V−1·s−1）。电化学研究证明了混合电容行为，结合电双层电容（EDLC）和伪电容，具有低内阻，优异的循环稳定性（95%电容保留），以及在20 mV·s−1时的比电容为~ 3.9 F·g−1。PhASn₂Cl₅/rGO纳米复合材料表现出增强的性能，在3 mA·cm - 2下实现了3.28 Wh·kg - 1的能量密度和342.86 W·kg - 1的功率密度。动力学分析表明，扩散控制过程在低扫描速率下占主导地位（在0.02 V·s−1下占~ 96%），而电容贡献以更高的速率增加（在0.2 V·s−1下占~ 12%），这表明rGO提供EDLC和PhASn₂Cl₅NCs贡献伪电容的协同机制。一个原型固态超级电容器成功地为led供电，证明了这些材料在下一代储能设备中的实际适用性。

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引用次数: 0

Design of polypyrrole-modified NiCo-LDH electrocatalysts for high-performance seawater electrolysis 聚吡咯改性NiCo-LDH高性能海水电解电催化剂的设计

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-02-15 Epub Date: 2025-12-30 DOI: 10.1016/j.jelechem.2025.119759

Ziqi Wang , Xiaomei Wang , Zhihao Xia , Tian Tian , Yucai Li , Shiwei Song , Jian Wang , Fang Hu , Lihua Miao

Among numerous transition metal hydrogen evolution reaction catalysts, nickel-based catalysts have garnered significant attention for their relatively better electrocatalytic activity. The hydrothermal-electrodeposition method provides an effective route for preparing relatively better nickel-based catalysts. Building upon this, this study successfully synthesised NiCo-LDH@PPy. Under alkaline conditions, NiCo-LDH@PPy-100 exhibits a HER overpotential of 210.7 mV at 50 mA cm⁻² and a double-layer capacitance of 0.013 mF cm⁻². Following 28 h of constant current testing, XPS experiments revealed minimal changes in elemental composition, suggesting good stability of the sample under electrochemical conditions. To more accurately evaluate the practical application potential of the catalyst, when the electrolyte was switched to alkaline seawater, NiCo-LDH@PPy-100 exhibits HER and OER overpotentials of 223.7 mV and 270 mV at 50 mA cm⁻², respectively. The overall water splitting potential was 1.64 V at a current density of 10 mA cm⁻², and the catalyst demonstrated excellent electrochemical stability during 50 h of continuous testing, offering a viable alternative to precious metal catalysts for seawater splitting.

在众多的过渡金属析氢反应催化剂中，镍基催化剂因其相对较好的电催化活性而备受关注。水热电沉积法为制备性能相对较好的镍基催化剂提供了一条有效途径。在此基础上，本研究成功合成了NiCo-LDH@PPy。在碱性条件下，NiCo-LDH@PPy-100在50 mA cm−2时的HER过电位为210.7 mV，双层电容为0.013 mF cm−2。恒流测试28 h后，XPS实验显示样品元素组成变化很小，表明样品在电化学条件下具有良好的稳定性。为了更准确地评估催化剂的实际应用潜力，当电解质切换到碱性海水中时，NiCo-LDH@PPy-100在50 mA cm−2下的HER和OER过电位分别为223.7 mV和270 mV。在10 mA cm−2电流密度下，总水分解电位为1.64 V，在50 h的连续测试中表现出优异的电化学稳定性，为海水分解提供了一种可行的替代贵金属催化剂。

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引用次数: 0

Enhanced structural stability and electrochemical performance of niobium-doped Li-rich manganese-based cathode materials 增强了掺铌富锂锰基正极材料的结构稳定性和电化学性能

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-02-15 Epub Date: 2026-01-09 DOI: 10.1016/j.jelechem.2026.119828

Yang Jiang, Jijiang Huang, Jing Li, Yang Yang, Hongyan Xie

Lithium-rich Mn-based layered oxides are promising cathodes for next-generation high-energy-density lithium-ion batteries. However, their practical use is limited by rapid voltage fading and sluggish high-rate performance. Introducing high-valent dopants such as Nb⁵⁺ is expected to induce charge compensation and strengthen the local TM–O framework, thereby mitigating high-voltage degradation. Here we introduce Nb into cobalt-free Li_1.2Mn_0.6−xNb_xNi_0.2O₂ (x = 0, 0.01, 0.02, 0.03) through a coprecipitation-compatible, water-assisted wet-grinding step followed by calcination, aiming to improve precursor-level mixing and enable controllable high-valent doping. Among the compositions, LLO-0.02Nb delivers the best overall performance, retaining 80% capacity after 200 cycles at 1C (vs. 78% for pristine LLO) and providing 163 and 142 mAh·g⁻¹ at 5C and 10C, respectively, together with a reduced voltage-decay tendency (1.87 mV per cycle). After-cycling electrode analyses (XRD/SEM) reveal better preserved layered-related features and less severe surface degradation for the Nb-doped electrode. Surface spectroscopy (XPS/EPR) further indicates that Nb incorporation regulates the near-surface oxygen environment and transition-metal valence states via charge compensation. These results suggest that a mild Nb addition, enabled by a simple wet-assisted introduction route, can simultaneously enhance voltage stability, cycling durability, and rate capability of Li-rich Mn-based cathodes.

富锂锰基层状氧化物是下一代高能量密度锂离子电池极具前景的阴极材料。然而，它们的实际应用受到快速的电压衰减和缓慢的高速率性能的限制。引入Nb5+等高价掺杂剂有望诱导电荷补偿并加强局部TM-O框架，从而减轻高压退化。本研究通过共沉淀相容、水辅助湿磨和煅烧的方法，将Nb引入到无钴Li1.2Mn0.6−xNbxNi0.2O2 （x = 0,0.01, 0.02, 0.03）中，旨在改善前驱体级混合，实现可控的高价掺杂。在这些组合物中，lo -0.02 nb具有最佳的综合性能，在1C下循环200次后保持80%的容量（而原始LLO为78%），在5C和10C下分别提供163和142 mAh·g−1，同时降低了电压衰减趋势（每循环1.87 mV）。循环后电极分析（XRD/SEM）表明，nb掺杂电极的层相关特征得到了更好的保存，表面降解程度较轻。表面光谱（XPS/EPR）进一步表明，Nb的掺入通过电荷补偿调节了近表面氧环境和过渡金属价态。这些结果表明，通过简单的湿辅助引入途径，添加少量Nb可以同时提高富锂锰基阴极的电压稳定性、循环耐久性和倍率能力。

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引用次数: 0

Interfacial engineering of polymer-functionalized Ti3C2 MXene nanocomposites for enhanced enzyme immobilization and high-performance H2O2 biosensing 聚合物功能化Ti3C2 MXene纳米复合材料的界面工程及其酶固定化和高性能H2O2生物传感

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-02-15 Epub Date: 2025-12-22 DOI: 10.1016/j.jelechem.2025.119757

Guixia Wang , Zhuo Yang , Min Wang , Huaxin Xu , Xianming Liu

Polymer-functionalized Ti₃C₂ MXene nanocomposites enable biocompatible immobilization of horseradish peroxidase (HRP). Using Ti₃C₂ MXene- Polyacrylamide (PAM) as a model, the resulting Ti₃C₂-PAM/HRP hybrid electrode exhibits exceptional electrocatalytic activity toward H₂O₂ reduction in neutral phosphate buffer (containing 1 mM hydroquinone). This electrode demonstrates superior performance with a wider linear range (0.3–0.9 mM) and lower detection limit (1.4 μM, S/N = 3) compared to pristine Ti₃C₂-PAM and Ti₃C₂/HRP controls. The enhancement originates from synergistic coupling between MXene conductivity and HRP biocatalysis, facilitated by the polymer-mediated formation of 3D conductive networks that minimize charge-transfer resistance. Structural and electrochemical analysis confirms optimized enzyme-electrode interactions and biocompatibility. This work establishes a versatile interfacial engineering strategy for creating high-performance enzyme-MXene hybrids, demonstrating significant potential for detecting redox biomarkers and adaptable to diverse enzymatic systems.

聚合物功能化Ti3C2 MXene纳米复合材料实现了辣根过氧化物酶（HRP）的生物相容性固定化。以Ti3C2 MXene-聚丙烯酰胺（PAM）为模型，所得的Ti3C2-PAM/HRP杂化电极在中性磷酸盐缓冲液（含1 mM对苯二酚）中对H2O2还原表现出优异的电催化活性。与原始Ti3C2- pam和Ti3C2/HRP对照相比，该电极具有更宽的线性范围（0.3-0.9 mM）和更低的检出限（1.4 μM, S/N = 3）。这种增强源于MXene电导率和HRP生物催化之间的协同耦合，聚合物介导的3D导电网络的形成促进了这种耦合，从而最大限度地减少了电荷转移阻力。结构和电化学分析证实优化酶电极相互作用和生物相容性。这项工作建立了一种多功能的界面工程策略，用于创建高性能的酶- mxene杂交体，展示了检测氧化还原生物标志物和适应各种酶系统的巨大潜力。

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引用次数: 0

Label-free molecularly imprinted polymer–based impedimetric biosensor for rapid detection of Morganella morganii in real samples 基于分子印迹聚合物的无标记阻抗生物传感器，用于快速检测真实样品中的莫氏摩根菌

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-02-15 Epub Date: 2026-01-06 DOI: 10.1016/j.jelechem.2026.119793

Hüseyin Oğuzhan Kaya , Yamaç Tekintaş , Fatma Kurul , Turku Acıkgoz , Seda Nur Topkaya

Morganella morganii is an emerging opportunistic pathogen associated with urinary tract infections, yet no selective biosensing platform has been reported for its rapid detection. In this study, we present the first molecularly imprinted polymer (MIP)-based electrochemical biosensor specifically tailored for M. morganii, enabling label-free, highly selective, and low-cost detection. The sensor was fabricated by electropolymerizing phenol in the presence of whole-cell bacteria on pencil graphite electrodes, followed by template removal to generate specific recognition cavities. Successful imprinting and selective rebinding were verified by electrochemical impedance spectroscopy and cyclic voltammetry.

The biosensor demonstrated a low LOD of 3.0 CFU/mL in real urine, excellent linearity (R² > 0.99), and high reproducibility (RSD < 10 %), confirming robust analytical performance. Notably, the sensor maintained high sensitivity in complex urine matrices, indicating strong matrix tolerance. Selectivity studies showed imprinting factors of 4.5–10.1 against E. coli, K. pneumoniae, S. aureus, and E. faecalis, confirming excellent discrimination capability. The biosensor retained >95 % of its initial response for 3 days and ∼ 56 % after 14 days, demonstrating satisfactory stability.

Compared to conventional microbiological and molecular assays, this MIP-based platform offers a rapid and label-free strategy for early detection of M. morganii in urinary tract infection diagnostics.

摩根氏摩根氏菌是一种新兴的与尿路感染相关的机会性病原体，但目前还没有选择性的生物传感平台来快速检测它。在这项研究中，我们提出了第一个专门为摩根氏分枝杆菌定制的基于分子印迹聚合物（MIP）的电化学生物传感器，实现无标签、高选择性和低成本的检测。该传感器是通过在铅笔石墨电极上的全细胞细菌存在下电聚合苯酚，然后去除模板以产生特定的识别腔来制造的。通过电化学阻抗谱和循环伏安法验证了印迹和选择性再结合的成功。该生物传感器在真实尿液中的LOD低至3.0 CFU/mL，线性良好（R2 > 0.99），重现性高（RSD < 10%），证实了可靠的分析性能。值得注意的是，该传感器在复杂的尿液基质中保持了高灵敏度，表明具有很强的基质耐受性。选择性研究表明，对大肠杆菌、肺炎克雷伯菌、金黄色葡萄球菌和粪肠杆菌的印迹因子为4.5 ~ 10.1，具有较好的鉴别能力。生物传感器在3天内保持了95%的初始反应，在14天后保持了56%，表现出令人满意的稳定性。与传统的微生物和分子检测相比，这种基于mip的平台为尿路感染诊断中的莫氏分枝杆菌的早期检测提供了快速和无标记的策略。

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引用次数: 0

A corn stalks-derived porous carbon‑silicon composite as lithium-ion battery anode materials 一种玉米秸秆衍生多孔碳硅复合材料作为锂离子电池负极材料

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2026-02-15 Epub Date: 2026-01-07 DOI: 10.1016/j.jelechem.2026.119805

Siyu Zhang , Mingtao Ding , Runfeng Song , Lili Yang , Dan Lv , Jingyi Luan , Wenbin Hu , Cheng Zhong

Silicon emerges as a promising anode material for lithium-ion batteries (LIBs), which is capable of affording a high theoretical specific capacity and a low working potential. However, the prospective anode material suffers from quite serious volume expansion, bad electrical conductivity and expensive costs, thereby hindering the commercial application of Si electrodes. In this work, a carbon‑silicon composite (CSPC@Si@C) was synthesized by using low-cost raw materials and it possessed an optimistic electrochemical performance. Firstly, corn stalks were adopted to fabricate a highly porous carbon substrate through ferric nitrate combined with water steam activation. Subsequently, nano-Si particles were deposited into the carbon substrate via thermal decomposition of silane. The procedure was finally followed by a carbon coating through the chemical vapor deposition (CVD) with the carbon source of methane. Benefiting from the porous structure and large specific surface area of the carbon substrate, the transportation rate of Li⁺ can be facilitated and the large volume expansion can be buffered. Conclusively, the electrochemical results show that CSPC@Si@C presents a high specific capacity of 789.6 mAh g⁻¹ at 0.2C (300 mA g⁻¹) after 100 cycles, delivering a superior capacity retention of 70.2%. Moreover, the corresponding CSPC@Si@C//LiNi_0.8Co_0.1Mn_0.1O₂ (NCM811) full cell gives rise to an outstanding long-term cycling stability, maintaining a reversible capacity of 67.7 mAh g⁻¹ after cycling with the capacity retention of 64.9%.

硅具有较高的理论比容量和较低的工作电势，是锂离子电池极具发展前景的负极材料。然而，未来的负极材料存在体积膨胀严重、导电性差、成本昂贵等问题，阻碍了硅电极的商业化应用。本文采用低成本原料合成了碳硅复合材料（CSPC@Si@C），该材料具有良好的电化学性能。首先，以玉米秸秆为原料，采用硝酸铁结合水蒸气活化法制备高孔碳基；随后，通过硅烷的热分解将纳米硅颗粒沉积到碳衬底中。最后，以甲烷为碳源，通过化学气相沉积（CVD）进行碳涂层。得益于碳基的多孔结构和较大的比表面积，可以促进Li+的运输速率，缓冲大体积膨胀。最后，电化学结果表明CSPC@Si@C在0.2C （300 mA g−1）下循环100次后具有789.6 mAh g−1的高比容量，容量保持率为70.2%。此外，相应的CSPC@Si@C//LiNi0.8Co0.1Mn0.1O2 （NCM811）充满电池具有出色的长期循环稳定性，循环后保持67.7 mAh g−1的可逆容量，容量保持率为64.9%。

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引用次数: 0