Electrochemistry Communications最新文献

英文中文

In situ construction of a dual-metal 2D conjugated metal-organic framework on carbon paper for asymmetric supercapacitors 非对称超级电容器用碳纸双金属共轭金属有机骨架的原位构建

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-11-09 DOI: 10.1016/j.elecom.2025.108077

Liguo Qian , Zhikai Tong , Yunling Jia , Ying Li

Two-dimensional conjugated metal-organic frameworks (2D c-MOFs), with their excellent electrical conductivity, high porosity, large specific surface area, and tunable active sites, have emerged as promising electrode materials for supercapacitors. However, limited charge transport pathways and low electron mobility in single-metal 2D c-MOFs significantly restrict their energy storage performance. To overcome these limitations, we propose a universal and innovative strategy for constructing bimetallic 2D c-MOFs. Activated carbon paper (CP) was used as the substrate. By adjusting the ratios of different metal ions (M₁/M₂ = Co, Cu, Ni), a bottom-up in situ self-assembly strategy was employed to synthesize three types of M₁/M₂-HHTP@CP electrode materials (Co/Ni-HHTP@CP, Co/Cu-HHTP@CP, Cu/Ni-HHTP@CP; HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene). The results show that the synergistic effect of Co and Ni is stronger than that of Co/Cu or Cu/Ni. Furthermore, the strengthened chemical bonding between Co/Ni-HHTP and CP markedly enhances the stability and electron transport of the electrode, resulting in a high specific capacitance of 544 F g⁻¹ for Co/Ni-HHTP@CP. When assembled into an asymmetric supercapacitor (Co/Ni-HHTP@CP || AC), the device delivers a power density of 400 W kg⁻¹ and an energy density of 52.11 W h kg⁻¹, while maintaining 93.02 % of its initial capacitance and 95.96 % Coulombic efficiency even after 5000 cycles. This study offers a new strategy for the rational design of bimetallic 2D c-MOFs-based supercapacitors.

二维共轭金属有机骨架（2D c-MOFs）具有优异的导电性、高孔隙率、大比表面积和可调活性位点，是超级电容器极具发展前景的电极材料。然而，单金属二维c- mof中有限的电荷传输途径和低电子迁移率严重限制了其储能性能。为了克服这些限制，我们提出了一种通用的创新策略来构建双金属二维c- mof。以活性炭纸（CP）为基材。通过调整不同金属离子（M1/M2 = Co, Cu, Ni）的比例，采用自下而上的原位自组装策略合成了三种类型的M1/M2-HHTP@CP电极材料（Co/Ni-HHTP@CP, Co/Cu-HHTP@CP, Cu/Ni-HHTP@CP; HHTP = 2,3,6,7,10,11-六羟基三苯）。结果表明，Co和Ni的协同效应强于Co/Cu或Cu/Ni。此外，Co/Ni-HHTP与CP之间化学键的增强显著提高了电极的稳定性和电子传递，使Co/Ni-HHTP@CP的比电容达到544 F g−1。当组装成非对称超级电容器（Co/Ni-HHTP@CP || AC）时，该器件提供了400 W kg−1的功率密度和52.11 Wh kg−1的能量密度，即使在5000次循环后仍保持93.02%的初始电容和95.96%的库仑效率。本研究为合理设计基于c- mofs的二维双金属超级电容器提供了新的思路。

{"title":"In situ construction of a dual-metal 2D conjugated metal-organic framework on carbon paper for asymmetric supercapacitors","authors":"Liguo Qian , Zhikai Tong , Yunling Jia , Ying Li","doi":"10.1016/j.elecom.2025.108077","DOIUrl":"10.1016/j.elecom.2025.108077","url":null,"abstract":"<div><div>Two-dimensional conjugated metal-organic frameworks (2D <em>c</em>-MOFs), with their excellent electrical conductivity, high porosity, large specific surface area, and tunable active sites, have emerged as promising electrode materials for supercapacitors. However, limited charge transport pathways and low electron mobility in single-metal 2D <em>c</em>-MOFs significantly restrict their energy storage performance. To overcome these limitations, we propose a universal and innovative strategy for constructing bimetallic 2D <em>c</em>-MOFs. Activated carbon paper (CP) was used as the substrate. By adjusting the ratios of different metal ions (M<sub>1</sub>/M<sub>2</sub> = Co, Cu, Ni), a bottom-up in situ self-assembly strategy was employed to synthesize three types of M<sub>1</sub>/M<sub>2</sub>-HHTP@CP electrode materials (Co/Ni-HHTP@CP, Co/Cu-HHTP@CP, Cu/Ni-HHTP@CP; HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene). The results show that the synergistic effect of Co and Ni is stronger than that of Co/Cu or Cu/Ni. Furthermore, the strengthened chemical bonding between Co/Ni-HHTP and CP markedly enhances the stability and electron transport of the electrode, resulting in a high specific capacitance of 544 F g<sup>−1</sup> for Co/Ni-HHTP@CP. When assembled into an asymmetric supercapacitor (Co/Ni-HHTP@CP || AC), the device delivers a power density of 400 W kg<sup>−1</sup> and an energy density of 52.11 W h kg<sup>−1</sup>, while maintaining 93.02 % of its initial capacitance and 95.96 % Coulombic efficiency even after 5000 cycles. This study offers a new strategy for the rational design of bimetallic 2D <em>c</em>-MOFs-based supercapacitors.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"181 ","pages":"Article 108077"},"PeriodicalIF":4.2,"publicationDate":"2025-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145526400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrigendum to “Illite-reinforced polymer/inorganic hybrid electrolytes for high-performance solid-state Lithium-metal batteries” [Electrochem. Commun. 181 (2025) 108075] “高性能固态锂金属电池用伊利石增强聚合物/无机杂化电解质”的勘误表[电化学]。common . 181 (2025) 108075]

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-11-05 DOI: 10.1016/j.elecom.2025.108076

Yujeong Yun , Jeong-Jin Yang , Jekyeong Yu , Sunkyung You , Jae-Kwang Kim , Young-Ran Lee , Seongki Ahn , Jinjoo Park , Hong-Il Kim

引用次数: 0

Electrolyte-dependent nitrogen bubble dynamics in hydrazine oxidation at Pt ultramicroelectrodes 铂超微电极上肼氧化中电解质依赖的氮泡动力学

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-10-26 DOI: 10.1016/j.elecom.2025.108074

Jihae Kim , Donghoon Han

The hydrazine oxidation reaction (HzOR) was investigated by cyclic voltammetry in electrolytes containing different ionic species to characterize gas-evolution potentials and interfacial kinetics. Systematic variations in current response and onset potential were observed with changes in electrolyte composition and concentration. These trends allowed estimation of the critical surface concentration required for bubble nucleation, providing quantitative insight into gas behavior at electrified interfaces. Measurements with Pt ultramicroelectrodes revealed a distinct current drop arising from N₂ bubble formation, serving as an electrochemical signature of interfacial gas nucleation. In the presence of iodide, an additional anodic peak was detected, demonstrating direct I⁻ involvement in the interfacial reaction pathway and identifying a secondary oxidation process beyond the canonical HzOR. These results establish a framework for assessing electrolyte-dependent bubble dynamics and their influence on gas-evolving electrochemical reactions.

采用循环伏安法研究了含不同离子的电解质中肼氧化反应（HzOR）的析气电位和界面动力学特征。随着电解质成分和浓度的变化，观察到电流响应和起始电位的系统性变化。这些趋势可以估计气泡成核所需的临界表面浓度，从而定量了解带电界面处的气体行为。Pt超微电极的测量结果显示，N2气泡形成引起了明显的电流下降，这是界面气体成核的电化学特征。在碘化物存在的情况下，检测到一个额外的阳极峰，表明I−直接参与界面反应途径，并确定了超越典型HzOR的二次氧化过程。这些结果为评估依赖电解质的气泡动力学及其对气体演化电化学反应的影响建立了框架。

引用次数: 0

Illite-reinforced polymer/inorganic hybrid electrolytes for high-performance solid-state Lithium-metal batteries 用于高性能固态锂金属电池的伊利石增强聚合物/无机混合电解质

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-10-25 DOI: 10.1016/j.elecom.2025.108075

Yujeong Yun , Jeong-Jin Yang , Jekyeong Yu , Sunkyung You , Jae-Kwang Kim , Young-Ran Lee , Seongki Ahn , Jinjoo Park , Hong-Il Kim

A composite polymer electrolyte (CPE) was developed by incorporating illite inorganic fillers into a polyethylene oxide (PEO) matrix with a UV-activated crosslinking agent. The illite fillers suppressed PEO crystallinity, enhanced Li-ion transport, and reinforced mechanical stability. The optimized CPE showed an ionic conductivity of 8.59 × 10⁻⁵ S cm⁻¹ at room temperature (25 °C) and a tensile strength of 9.86 MPa, and a LiNi_0.6Mn_0.2Co_0.2O₂ (NCM622)//Li coin cell incorporating the optimized CPE delivered a discharge capacity of 128 mAh g⁻¹ after 100 cycles. This strategy offers a promising route to safe, high-performance solid-state lithium-metal batteries.

将伊利石无机填料掺入聚乙烯氧化物（PEO）基体中，采用uv活化交联剂制备了复合聚合物电解质（CPE）。伊利石填料抑制PEO结晶度，增强锂离子输运，增强机械稳定性。优化后的CPE在室温（25℃）下的离子电导率为8.59 × 10−5 S cm−1，抗拉强度为9.86 MPa，采用优化后的CPE制备的LiNi0.6Mn0.2Co0.2O2 (NCM622)//Li纽扣电池在100次循环后的放电容量为128 mAh g−1。这种策略为制造安全、高性能的固态锂金属电池提供了一条有前途的途径。

引用次数: 0

Accelerated degradation of carbon steel in seawater for the purpose of passive demolition of marine structures 用于被动拆除海洋结构物的碳钢在海水中的加速降解

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-10-25 DOI: 10.1016/j.elecom.2025.108066

Matthew J. Cullin , Raghu Srinivasan

This work investigates electrochemical methods for accelerating the corrosion of plain carbon steel in seawater with the intention of informing efforts to passively demolish steel marine structures. The study examined both galvanic (dissimilar metal) and oxidizing chemical (non-galvanic) approaches to increasing the corrosion rate of plain carbon steel in seawater. Zero-resistance ammetry experiments showed that when coupled to plain carbon steel in substitute ocean [sea] water, Grade 2 titanium and 316 stainless steel increased the corrosion rate of plain carbon steel (over baseline) by 4.8x and 13x respectively. Polarization measurements were used to investigate the effect of oxidizing chemicals in substitute ocean [sea] water on the corrosion rate of plain carbon steel, in the absence of a galvanic couple. The most aggressive of the candidate species, 0.1M oxalic acid + 0.01M FeCl₃, produced a plain carbon steel corrosion rate of 26.1 mpy. The results of this work indicate that both the titanium galvanic couple approach, and aggressive chemical approach (oxalic acid + ferric chloride), are viable options for the passive demolition of carbon steel marine structures.

这项工作研究了电化学方法加速普通碳钢在海水中的腐蚀，旨在为被动拆除钢海洋结构的努力提供信息。该研究考察了电（异种金属）和氧化化学（非电）两种方法来提高普通碳钢在海水中的腐蚀速率。零电阻测量实验表明，当2级钛和316不锈钢与普通碳钢在替代海水中耦合时，普通碳钢的腐蚀速率（超过基线）分别提高了4.8倍和13倍。在没有电偶的情况下，用极化测量法研究了替代海水中氧化化学物质对普通碳钢腐蚀速率的影响。最具侵蚀性的候选物质为0.1M草酸+ 0.01M FeCl3，对普通碳钢的腐蚀速率为26.1 mpy。研究结果表明，钛电偶法和侵蚀化学法（草酸+氯化铁）都是被动拆除碳钢海洋结构的可行选择。

{"title":"Accelerated degradation of carbon steel in seawater for the purpose of passive demolition of marine structures","authors":"Matthew J. Cullin , Raghu Srinivasan","doi":"10.1016/j.elecom.2025.108066","DOIUrl":"10.1016/j.elecom.2025.108066","url":null,"abstract":"<div><div>This work investigates electrochemical methods for accelerating the corrosion of plain carbon steel in seawater with the intention of informing efforts to passively demolish steel marine structures. The study examined both galvanic (dissimilar metal) and oxidizing chemical (non-galvanic) approaches to increasing the corrosion rate of plain carbon steel in seawater. Zero-resistance ammetry experiments showed that when coupled to plain carbon steel in substitute ocean [sea] water, Grade 2 titanium and 316 stainless steel increased the corrosion rate of plain carbon steel (over baseline) by 4.8x and 13x respectively. Polarization measurements were used to investigate the effect of oxidizing chemicals in substitute ocean [sea] water on the corrosion rate of plain carbon steel, in the absence of a galvanic couple. The most aggressive of the candidate species, 0.1M oxalic acid + 0.01M FeCl<sub>3</sub>, produced a plain carbon steel corrosion rate of 26.1 mpy. The results of this work indicate that both the titanium galvanic couple approach, and aggressive chemical approach (oxalic acid + ferric chloride), are viable options for the passive demolition of carbon steel marine structures.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"181 ","pages":"Article 108066"},"PeriodicalIF":4.2,"publicationDate":"2025-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145526293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Time-resolved X-ray computed tomography of wetting at the outer surface of the microporous layer in a polymer electrolyte fuel cell 聚合物电解质燃料电池微孔层外表面润湿的时间分辨x射线计算机断层扫描

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-10-24 DOI: 10.1016/j.elecom.2025.108065

Satoru Kato, Satoshi Yamaguchi, Yoriko Matsuoka, Akihiko Kato, Takahisa Suzuki, Yasutaka Nagai

This study presents time-resolved X-ray computed tomography (CT) measurements to investigate the wetting and water discharge behavior of the microporous layer (MPL) in a gas diffusion layer (GDL) used in polymer electrolyte fuel cells. To simulate the condensation of water vapor generated in the catalyst layer, we cooled the substrate side of the GDL using a Peltier device, allowing water vapor that had diffused into the MPL to condense into liquid. The resultant time-resolved CT images showed the dynamic evolution of wet domains in the MPL. The wet fraction of the MPL reached a steady state, whereas the water accumulation continued to progress both on the MPL outer surface and in the substrate side. Classification of wet domains on the basis of their connectivity revealed that domains connected to the outer surface of the MPL serve as persistent discharge pathways of the liquid water from the MPL.

本研究提出了时间分辨x射线计算机断层扫描（CT）测量，以研究用于聚合物电解质燃料电池的气体扩散层（GDL）中的微孔层（MPL）的润湿和水放电行为。为了模拟催化剂层中产生的水蒸气的冷凝，我们使用Peltier装置冷却GDL的衬底侧，使已经扩散到MPL中的水蒸气凝结成液体。由此产生的时间分辨CT图像显示了MPL中湿域的动态演变。MPL的湿组分达到稳定状态，而MPL外表面和基材一侧的水积累继续进行。基于其连通性的湿域分类表明，连接MPL外表面的域是MPL液态水的持续排放途径。

引用次数: 0

Label-free electrochemical immunosensing of cystatin C base on aptamer/gold/MXene nanoribbons 基于适体/金/MXene纳米带的胱抑素C的无标记电化学免疫传感

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-10-24 DOI: 10.1016/j.elecom.2025.108063

Yiting Wang , Yu Huang , Lingling Zhu , Xunyu Xu , Bin Qiu , Yuqing Chen , Qianshun Chen

Cystatin C (CysC) is gaining prominence as a pivotal biomarker for evaluating gestational diabetes mellitus, a condition with profound implications for both maternal and fetal well-being. Herein, a facile and sensitive label-free electrochemical immunosensor for Cys-C was developed utilizing a modified electrode based on Ti₃C₂Tₓ MXene nanoribbons (TiC NRs) decorated with gold nanoparticles (Au NPs) (TiC NRs/Au) nanohybrids. Comprehensive characterization of the TiC NRs/Au hybrids was performed using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and electrochemical techniques. The Cys-C specific aptamer (Apt) was immobilized onto the modified electrode surface via the formation of the AuS bonds between the Au NPs and the thiolated Apt. Potassium ferrocyanide (K₄[Fe (CN)₆]) served as the electrochemical signal probe; binding of Cys-C to the immobilized Apt resulted in a measurable suppression of this probe's signal, thereby enabling target quantification. Following optimization of key assay parameters, the immunosensor demonstrated a broad linear detection range spanning 0.3 to 800 ng/mL and achieved a remarkably low detection limit of 0.1 ng/mL for CysC, underscoring the significant clinical diagnostic potential of this novel sensing strategy.

胱抑素C （CysC）作为评估妊娠期糖尿病的关键生物标志物正日益受到重视，妊娠期糖尿病对母体和胎儿的健康都有深远的影响。本文利用Ti₃C₂TₓMXene纳米带（TiC NRs）修饰金纳米粒子（Au NPs）（TiC NRs/Au）纳米杂化物，开发了一种简便、灵敏的Cys-C无标记电化学免疫传感器。利用扫描电子显微镜、透射电子显微镜、x射线衍射和电化学技术对TiC nmr /Au杂化物进行了全面表征。Cys-C特异性适体（Apt）通过Au NPs与巯基化Apt之间形成Au键固定在修饰电极表面，亚铁氰化钾（K₄[Fe （CN）₆]）作为电化学信号探针；Cys-C与固定的Apt结合，导致该探针信号的可测量抑制，从而实现目标量化。在对关键检测参数进行优化后，该免疫传感器的线性检测范围为0.3 ~ 800 ng/mL，对CysC的检测限极低，仅为0.1 ng/mL，这表明该传感策略具有重要的临床诊断潜力。

{"title":"Label-free electrochemical immunosensing of cystatin C base on aptamer/gold/MXene nanoribbons","authors":"Yiting Wang , Yu Huang , Lingling Zhu , Xunyu Xu , Bin Qiu , Yuqing Chen , Qianshun Chen","doi":"10.1016/j.elecom.2025.108063","DOIUrl":"10.1016/j.elecom.2025.108063","url":null,"abstract":"<div><div>Cystatin C (Cys<img>C) is gaining prominence as a pivotal biomarker for evaluating gestational diabetes mellitus, a condition with profound implications for both maternal and fetal well-being. Herein, a facile and sensitive label-free electrochemical immunosensor for Cys-C was developed utilizing a modified electrode based on Ti₃C₂Tₓ MXene nanoribbons (TiC NRs) decorated with gold nanoparticles (Au NPs) (TiC NRs/Au) nanohybrids. Comprehensive characterization of the TiC NRs/Au hybrids was performed using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and electrochemical techniques. The Cys-C specific aptamer (Apt) was immobilized onto the modified electrode surface via the formation of the Au<img>S bonds between the Au NPs and the thiolated Apt. Potassium ferrocyanide (K₄[Fe (CN)₆]) served as the electrochemical signal probe; binding of Cys-C to the immobilized Apt resulted in a measurable suppression of this probe's signal, thereby enabling target quantification. Following optimization of key assay parameters, the immunosensor demonstrated a broad linear detection range spanning 0.3 to 800 ng/mL and achieved a remarkably low detection limit of 0.1 ng/mL for Cys<img>C, underscoring the significant clinical diagnostic potential of this novel sensing strategy.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"181 ","pages":"Article 108063"},"PeriodicalIF":4.2,"publicationDate":"2025-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145463721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Amperometric biosensors: Why might the response show a logarithmic dependence on analyte concentration? 安培生物传感器：为什么响应可能显示对分析物浓度的对数依赖？

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-10-22 DOI: 10.1016/j.elecom.2025.108064

Morgan P. Milner , Stanislav V. Sokolov , Richard G. Compton

Amperometric biosensors of different designs are often reported as having a logarithmic dependency on the target concentration. This paper provides a physicochemical basis for this behaviour if the adsorption of the analyte follows the Temkin Adsorption Isotherm over the range of concentrations of interest either by directly controlling the amount adsorbed or indirectly via the effect on the electrochemical rate constant.

不同设计的安培生物传感器通常被报道为对目标浓度具有对数依赖性。本文为这种行为提供了物理化学基础，如果被分析物的吸附在感兴趣的浓度范围内遵循Temkin吸附等温线，要么直接控制吸附量，要么间接通过对电化学速率常数的影响。

引用次数: 0

Surfactant-assisted solution combustion synthesis of Li3V2(PO4)3/C cathode material for lithium-ion battery 表面活性剂辅助溶液燃烧合成锂离子电池正极材料Li3V2(PO4)3/C

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-10-10 DOI: 10.1016/j.elecom.2025.108062

E. Mohammadiha, S.M. Masoudpanah, S. Alamolhoda

In this work, single-phase Li₃V₂(PO₄)₃ powders were synthesized by the solution combustion route using cetyltrimethylammonium bromide (CTAB) and/or polyvinyl pyrrolidine (PVP) as organic fuel following calcination at above 750 °C. The large Li₃V₂(PO₄)₃ particles were dispersed in a carbon substrate, which was obtained by thermally decomposing the CTAB and PVP fuels as a carbon source. Furthermore, there was a carbon layer on Li₃V₂(PO₄)₃ particles with an average thickness of 12 and 5 nm for CTAB and PVP, respectively. The CTAB-assisted Li₃V₂(PO₄)₃/C powders showed a higher charge storage capability, including a higher discharge specific capacity of 110 mAh g⁻¹ at 0.1C, higher rate capability, and higher capacity retention of 99 % at 1C for 200 charge/discharge cycles. The higher electrochemical performance was attributed to the higher crystallinity, higher graphitization of the carbon layer, and lower charge transfer resistance caused by the CTAB fuel.

本文以十六烷基三甲基溴化铵（CTAB）和/或聚乙烯醇吡咯烷（PVP）为有机燃料，在750℃以上煅烧，采用溶液燃烧的方法合成了单相Li₃V₂（PO₄）₃粉体。将CTAB和PVP燃料作为碳源热分解得到的Li₃V₂（PO₄）₃大颗粒分散在碳基质中。此外，CTAB和PVP的Li₃V₂（PO₄）₃颗粒上有碳层，平均厚度分别为12 nm和5 nm。ctab辅助的Li₃V₂（PO₄）₃/C粉体具有较高的电荷存储能力，包括在0.1C下的放电比容量为110 mAh g−1，更高的倍率容量，在1C下200次充放电循环的容量保持率为99%。CTAB燃料具有较高的结晶度、较高的碳层石墨化程度和较低的电荷转移电阻，从而提高了电化学性能。

引用次数: 0

Research on the temperature radius stratification model based on electrochemical-thermal-force coupling in Lithium-ion batteries 基于电化学-热力耦合的锂离子电池温度半径分层模型研究

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-10-02 DOI: 10.1016/j.elecom.2025.108052

Tengfei Long, Yun Guo

This study investigates aging mechanisms in lithium-ion batteries (LIBs) under high rate conditions using an electrochemical-thermal-mechanical (ETM) coupling model with temperature-radius stratification. Focusing on solid electrolyte interface (SEI) formation, thermal dynamics, and diffusion-induced stress (DIS), we reveal that increasing C-rates significantly elevate heat generation, reducing electrode thermal stability and accelerating positive electrode degradation. High-rate cycling intensifies SEI uneven distribution and concentration, hastening capacity loss. Prolonged cycling shows greater von Mises stress in positive electrodes (tensile deformation) versus negative electrodes (compressive deformation), with lower available lithium-ion concentration in positives. Cut-off voltage analysis demonstrates that reducing charging voltage or increasing discharging voltage mitigates capacity loss, with positive electrodes more sensitive to discharge voltage and negatives to charge voltage. Our temperature-radius stratified model provides precise analysis of fast-charging aging mechanisms, offering theoretical support for optimized battery design and operation strategies. Future work should address SEI film dynamics, lithium plating, and internal gas generation for comprehensive aging understanding.

本研究使用具有温度-半径分层的电化学-热-机械（ETM）耦合模型研究了高倍率条件下锂离子电池（LIBs）的老化机制。通过研究固体电解质界面（SEI）的形成、热动力学和扩散诱导应力（DIS），我们发现c -速率的增加显著提高了热量的产生，降低了电极的热稳定性，加速了正极的降解。高速循环加剧了SEI的不均匀分布和集中，加速了容量的损失。与负极（压缩变形）相比，长时间循环显示正极（拉伸变形）的von Mises应力更大，正极的可用锂离子浓度更低。截止电压分析表明，降低充电电压或提高放电电压可以减轻容量损失，正极对放电电压更敏感，负极对充电电压更敏感。该温度-半径分层模型可精确分析快充老化机理，为电池优化设计和运行策略提供理论支持。未来的工作应该研究SEI薄膜动力学、锂电镀和内部气体生成，以全面了解老化。

{"title":"Research on the temperature radius stratification model based on electrochemical-thermal-force coupling in Lithium-ion batteries","authors":"Tengfei Long, Yun Guo","doi":"10.1016/j.elecom.2025.108052","DOIUrl":"10.1016/j.elecom.2025.108052","url":null,"abstract":"<div><div>This study investigates aging mechanisms in lithium-ion batteries (LIBs) under high rate conditions using an electrochemical-thermal-mechanical (ETM) coupling model with temperature-radius stratification. Focusing on solid electrolyte interface (SEI) formation, thermal dynamics, and diffusion-induced stress (DIS), we reveal that increasing C-rates significantly elevate heat generation, reducing electrode thermal stability and accelerating positive electrode degradation. High-rate cycling intensifies SEI uneven distribution and concentration, hastening capacity loss. Prolonged cycling shows greater von Mises stress in positive electrodes (tensile deformation) versus negative electrodes (compressive deformation), with lower available lithium-ion concentration in positives. Cut-off voltage analysis demonstrates that reducing charging voltage or increasing discharging voltage mitigates capacity loss, with positive electrodes more sensitive to discharge voltage and negatives to charge voltage. Our temperature-radius stratified model provides precise analysis of fast-charging aging mechanisms, offering theoretical support for optimized battery design and operation strategies. Future work should address SEI film dynamics, lithium plating, and internal gas generation for comprehensive aging understanding.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"180 ","pages":"Article 108052"},"PeriodicalIF":4.2,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

首页上一页

下一页尾页

类型

全部化学•材料生命科学医学物理工程技术环境•农林材料科学地球科学法学管理学化学环境科学与生态学计算机科学教育学经济学农林科学人文科学生物学数学物理与天体物理心理学综合性期刊其他工业工程理学历史学农学文学信息工程

数据库

全部 ACS Publications Elsevier ieeexplore Springer The Royal Society of Chemistry Wiley

期刊

Electrochemistry Communications

全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.

﹀