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Very Low Concentrations of Maritime Exhaust Gas Cleaning System Effluent Impair Fertilization and Larval Development in the Green Sea Urchin Strongylocentrotus droebachiensis 极低浓度的船舶废气净化系统污水影响绿海胆的受精和幼虫发育
IF 9.028 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2026-02-08 DOI: 10.1021/acs.est.5c02483
Chiau Yu Chen,Kerstin Magnusson,Roland Pfeiffer,Sam Dupont,Maria E. Granberg
Exhaust gas cleaning systems (EGCS) are increasingly used to meet IMO sulfur regulations while permitting the continued use of heavy fuel oil. EGCS effluents are acidic and contain metals, polycyclic aromatic compounds, and other contaminants that are known to affect marine organisms. Whole effluent toxicity tests were conducted on fertilization and larval development of the green sea urchin Strongylocentrotus droebachiensisusing a 0–10% dilution series of open-loop EGCS effluent. Fertilization success was significantly reduced at the lowest concentration tested (0.0001%). Larval abnormalities increased with effluent concentration, reaching 100% at 10% effluent, where larvae failed to develop skeletons and reach the pluteus stage. Larval growth rates declined with increasing exposure and ceased at a 10% effluent. Exposure to the lowest test concentration caused an estimated additional mortality of 4.6% day–1, indicating a high risk of population-level impacts. As carbonate chemistry remained unchanged below 0.1% effluent, the toxicity was attributed primarily to contaminants. These findings indicate that EGCS effluents pose a significant threat to marine life.
废气净化系统(EGCS)越来越多地用于满足IMO硫法规,同时允许继续使用重质燃料油。EGCS出水呈酸性,含有金属、多环芳香族化合物和其他已知会影响海洋生物的污染物。采用0-10%稀释的EGCS开环出水对绿海胆的受精和幼虫发育进行了全毒性试验。最低浓度(0.0001%)显著降低了施肥成功率。随着出水浓度的增加,幼虫的异常程度增加,在10%的出水时达到100%,幼虫不能发育骨骼,达到pluteus期。幼虫的生长速度随着暴露量的增加而下降,并在10%的出水时停止生长。暴露于最低测试浓度下,估计第1天的死亡率增加4.6%,表明人群水平影响的风险很高。由于碳酸盐的化学性质在0.1%以下仍保持不变,因此毒性主要归因于污染物。这些研究结果表明,EGCS废水对海洋生物构成严重威胁。
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引用次数: 0
Six-Component Telescope Assembly of sp3-Rich Hexahydro-pyrrolo[3,4-c]pyridine-1,6-diones via Sequential Enaminone Formation, Aza-Annulation, Hydrogenation, and Ugi Cyclization 富sp3六氢吡咯[3,4-c]吡啶-1,6-二酮的序序胺酮生成、偶氮环化、氢化和Ugi环化六组分望远镜组装
IF 4.354 2区 化学 Q1 CHEMISTRY, ORGANIC Pub Date : 2026-02-08 DOI: 10.1021/acs.joc.5c02621
Ainara Bekbolatova,Azat M. Makhmet,Azamat Begenov,Sofia D. Martynova,Niyaz Amire,Anton A. Nechaev,Rakhmetulla Yerkassov,Andrey Belyaev,Davit Hayrapetyan,Anatoly A. Peshkov,Vsevolod A. Peshkov
We report a six-component, four-step telescope sequence that enables rapid access to structurally complex, sp3-enriched hexahydro-1H-pyrrolo[3,4-c]pyridine-1,6(2H)-dione scaffold. The streamlined protocol integrates enaminone formation, intramolecular aza-annulation, heterogeneous alkene hydrogenation, and a three-component Ugi cyclization within a single operational sequence requiring only one purification step. This approach unites multicomponent and tandem reaction principles to deliver diastereomerically defined products featuring four contiguous stereocenters. The method demonstrates high atom economy and modular diversification through systematic variation of isocyanide and amine inputs.
我们报道了一个六组分,四步望远镜序列,可以快速获得结构复杂,富含sp3的六氢- 1h -吡咯[3,4-c]吡啶-1,6(2H)-二酮支架。流线型方案集成了胺酮形成,分子内氮杂环化,异构烯烃氢化和三组分Ugi环化在一个操作序列中,只需要一个纯化步骤。这种方法结合了多组分和串联反应原理,以提供具有四个连续立体中心的非对映定义的产品。该方法通过系统地改变异氰化物和胺的投入,证明了高原子经济性和模块化多样化。
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引用次数: 0
Space Series: Leveraging Geometric Features of Heterostructures for Cross-Composition Property Prediction of Core–Shell Quantum Dots 空间序列:利用异质结构的几何特征预测核壳量子点的交叉组成性质
IF 6.475 2区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2026-02-08 DOI: 10.1021/acs.jpclett.5c03783
Xinyu Deng,Jinzhe Cao,Shengyang Tao
The spatial arrangement of compositions in functional materials plays a pivotal role in modulating their properties. While various representations exist for predicting the benchmark properties of constituent compositions, geometric factors like heterogeneity beyond the atomic scale, which are crucial to the overall behavior of the material, are not encoded explicitly, leading to poor generalization to materials with scarce training data. In this work, we introduce a novel representation, called a space series, which explicitly encodes the geometric features of heterostructures. As a proof of concept, we apply this approach to the property prediction of core–shell quantum dots (CSQDs). Our model, designed to generate and leverage these geometric-compositional sequences, outperforms traditional machine learning methods in terms of generalization across different data sets. Further analysis reveals that such sequences enable the model to effectively capture spatial dependencies within the system, offering a novel pathway for incorporating geometric factors into functional material predictions.
功能材料中组合物的空间排列对其性能的调节起着关键作用。虽然存在各种表示来预测组成成分的基准性能,但对材料的整体行为至关重要的几何因素,如原子尺度以外的异质性,没有明确编码,导致缺乏训练数据的材料泛化能力差。在这项工作中,我们引入了一种新的表示,称为空间序列,它明确地编码异质结构的几何特征。作为概念验证,我们将此方法应用于核壳量子点(CSQDs)的性质预测。我们的模型旨在生成和利用这些几何组合序列,在不同数据集的泛化方面优于传统的机器学习方法。进一步的分析表明,这样的序列使模型能够有效地捕获系统内的空间依赖性,为将几何因素纳入功能材料预测提供了一种新的途径。
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引用次数: 0
An Antipolarity Luminescence Enhancement in Dy/Eu@Gd-MOFs Induced by Isomeric Solvents. 异构体溶剂诱导Dy/Eu@Gd-MOFs的反极性发光增强。
IF 2.9 2区 化学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2026-02-08 DOI: 10.1021/acs.jpcb.5c08096
Xiaoxuan Fan, Yonggui Zheng, Jiayi Yan, Xia Hong, Chunyan Du, Shuo Cao, Xiufeng Wu, Zhiyu Liu, Xingli Yang, Feifei Yin, Kexin Wang, Jiwei Wang

Highly polar solvents are generally considered to significantly quench the luminous emission of rare-earth doping luminescence materials. In this work, we reported a counterintuitive luminescence phenomenon in Dy/Eu@Gd-MOFs. Their photoluminescence (PL) behaviors in propanol/butanol isomers exhibit trends of emission intensity that inversely correlate with solvent polarity. This phenomenon should not be simplistically ascribed to quenching induced solely by reabsorption, solvent effects, or high-frequency vibrational groups. The structural differences among propanol and butanol isomers result in diversified high-frequency and fingerprint-region vibrational modes. When these vibrations resonate with the critical energy gap, they nonradiative decay in the sensitizer through vibrational coupling, thereby steering energy toward the activator. Time-resolved spectra acquired at different temperatures provide a detailed analysis and evidence for this opinion. These findings give an unconventional interpretation for solvent-induced luminescence quenching in rare-earth luminescence materials, enabling a novel route for modulating their excited states through solvent engineering.

高极性溶剂通常被认为对稀土掺杂发光材料的发光有明显的猝灭作用。在这项工作中,我们报道了Dy/Eu@Gd-MOFs中的一种违反直觉的发光现象。它们在丙醇/丁醇异构体中的光致发光(PL)行为表现出与溶剂极性负相关的发射强度趋势。这种现象不能简单地归结为仅仅由重吸收、溶剂效应或高频振动基团引起的淬火。丙醇和丁醇异构体的结构差异导致了不同的高频和指纹区振动模式。当这些振动与临界能隙共振时,它们通过振动耦合在敏化剂中非辐射衰减,从而将能量转向激活剂。在不同温度下获得的时间分辨光谱为这一观点提供了详细的分析和证据。这些发现为稀土发光材料的溶剂致发光猝灭提供了一种非常规的解释,为通过溶剂工程调节其激发态提供了一条新的途径。
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引用次数: 0
Wildfires Oppositely Modify Radiocesium Mobility in Forest Litter and Soils: Evidence from Radiologically Contaminated Areas in Fukushima 野火相反地改变森林凋落物和土壤中放射性元素的流动性:来自福岛放射性污染地区的证据
IF 9.028 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Pub Date : 2026-02-08 DOI: 10.1021/acs.est.5c10144
Yasunori Igarashi,Seiji Hayashi,Shoko Ito,Masanori Tamaoki,Tadafumi Niizato,Yoshito Sasaki,Satomi Ito,Naoki Nomura,Hirotsugu Arai
Wildfires in radiologically contaminated areas have raised concerns about radionuclide redistribution and increased radiation exposure. Most radionuclides, such as radiocesium (137Cs), remain in the charred residues and burned soil even after wildfires. This study investigated the impact of wildfires on 137Cs speciation in forest litter and soils following the Fukushima nuclear accident. Extraction tests of 137Cs from unburned litter and soil artificially combusted at 250, 375, and 500 °C were conducted. 137Cs leaching from charred residues and burned soil collected from the field after the wildfires was tested. Sequential extraction was performed on soil obtained after the fire. The results indicated that water-soluble 137Cs from burned litter increased with combustion temperature. However, in artificially combusted soil, the release of water-soluble 137Cs was significantly reduced. In the field, 137Cs leaching from charred residues was lower than that from unburned litter. The fraction of water-soluble 137C in burned soil did not differ significantly from that in unburned soil. This suggests that the combustion temperature was relatively low and insufficient to promote significant leaching or soil drying. Furthermore, the combustion of soil organic matter may have altered the exchangeable form of 137Cs. Overall, these findings suggest that wildfires enhance 137Cs retention in soil, potentially delaying its release.
放射性污染地区的野火引起了人们对放射性核素再分布和辐射暴露增加的担忧。大多数放射性核素,如放射性铯(137Cs),即使在野火之后也会留在烧焦的残留物和烧焦的土壤中。研究了福岛核事故后森林火灾对森林凋落物和土壤中137Cs形态的影响。在250℃、375℃和500℃人工燃烧条件下,从未燃烧的凋落物和土壤中提取137Cs。测试了野火后从田间收集的烧焦残留物和烧焦土壤中提取的137Cs浸出。对火灾后获得的土壤进行序贯提取。结果表明,随着燃烧温度的升高,凋落物中水溶性137Cs含量增加。而在人工燃烧土壤中,水溶性 137Cs的释放明显减少。在田间,烧焦残渣的137Cs淋出量低于未烧焦凋落物。燃烧土壤中水溶性 137C的含量与未燃烧土壤无显著差异。这表明燃烧温度相对较低,不足以促进显著的淋滤或土壤干燥。此外,土壤有机质的燃烧可能改变了 137Cs的交换形式。总的来说,这些发现表明,野火增加了土壤中137Cs的保留,可能会推迟其释放。
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引用次数: 0
Efficient Monte Carlo Simulation of Faceted Nanoparticles Using Analytical Interaction Potentials 利用分析相互作用势的高效蒙特卡罗模拟多面纳米颗粒
IF 6.475 2区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2026-02-08 DOI: 10.1021/acs.jpclett.5c04083
Şafak Çallıoğlu,Quanpeng Yang,Yuanchuan Shao,Brian H. Lee,Gaurav Arya
Understanding how energetic interactions between faceted nanoparticles (NPs) drive their self-assembly into higher-order architectures is critical for controlling various properties of NP assemblies. Here, we integrate analytical potentials that capture orientation-dependent van der Waals interactions into a Monte Carlo simulation framework for fast and accurate modeling of NP self-assembly. By implementing virtual cluster moves in the framework, we overcome sampling limitations and account for size-dependent diffusion of clusters. Simulations using the analytical potentials are orders of magnitude faster than atomistic and coarse-grained models while producing correct assembly morphologies. Phase behavior calculations of faceted NPs with weak and strong interparticle attractions show that attraction enhances ordering and shifts isotropic-to-semiordered transitions to lower volume fractions, while semiordered-to-crystalline transitions remain largely entropy driven. Overall, this work highlights the importance of enthalpic interactions and the advantages of using analytical potentials for efficient simulations of faceted NPs.
了解面纳米颗粒(NPs)之间的能量相互作用如何驱动其自组装到高阶结构中,对于控制NP组件的各种特性至关重要。在这里,我们将捕获方向依赖的范德华相互作用的分析势集成到蒙特卡罗模拟框架中,以快速准确地建模NP自组装。通过在框架中实现虚拟集群移动,我们克服了采样限制,并考虑了集群的大小依赖扩散。在生成正确的装配形态时,使用分析势的模拟比原子模型和粗粒度模型快几个数量级。对具有弱和强粒子间吸引力的面状NPs的相行为计算表明,吸引力增强了有序性,并将各向同性到半有序的转变转移到更小的体积分数,而半有序到晶体的转变主要是由熵驱动的。总的来说,这项工作强调了焓相互作用的重要性,以及使用分析势对面NPs进行有效模拟的优势。
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引用次数: 0
Environmental Contributions to Proton Sharing in Protein Low-Barrier Hydrogen Bonds. 环境对蛋白质低势垒氢键中质子共享的影响。
IF 3 3区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2026-02-08 DOI: 10.1021/acs.biochem.5c00762
Jiusheng Lin, Oksana Gerlits, Daniel W Kneller, Kevin L Weiss, Leighton Coates, Jennifer L Clarke, Mark A Hix, Solomon Y Effah, Andrey Kovalevsky, Alice R Walker, Mark A Wilson

Hydrogen bonds (H-bonds) are central to biomolecular structure and dynamics. Although H-bonds are typically characterized by well-defined proton positions, proton delocalization has been proposed to play a role in facilitating enzyme catalysis and allostery in some systems. Experimentally locating protons is difficult, hampering the study of proton mobility in H-bonds. We used neutron crystallography, atomic resolution X-ray bond length analysis, and large quantum mechanics/molecular mechanics-Born-Oppenheimer molecular dynamics (QM/MM-BOMD) simulations to comprehensively characterize the shared proton/deuteron in a Glu-Asp low-barrier hydrogen bond (LBHB) in the bacterial protein YajL that is a conventional H-bond in the homologous disease-associated human protein DJ-1. X-ray bond length analysis of protiated and perdeuterated DJ-1 and YajL shows no significant effect of deuteron substitution on these carboxylic acid-carboxylate H-bonds but does reveal an effect at the active site glutamic acid near a cysteine thiolate. Residues in an H-bonded network that might favor LBHB formation in YajL were interrogated by the mutation of homologous residues in DJ-1. A distal DJ-1 substitution increases proton delocalization in the Glu-Asp H-bond, demonstrating that mutations within extended H-bond networks can modulate proton transfer barriers in carboxylic acid-carboxylate H-bonds. In addition, proton mobility in the H-bond is correlated with dimer-spanning motions in the QM/MM-BOMD simulations of YajL and DJ-1. Our results show that proton delocalization can be tuned using combined bioinformatic, structural, and computational information, opening the possibility of using engineered proton delocalization as a probe of H-bonding environments and as a tool to test hypotheses about LBHB function.

氢键(氢键)是生物分子结构和动力学的核心。虽然氢键的典型特征是质子位置明确,但在某些系统中,质子离域被认为在促进酶催化和变构中起作用。实验定位质子是困难的,阻碍了氢键中质子迁移率的研究。我们利用中子晶体学、原子分辨率x射线键长分析和大量子力学/分子力学- born - oppenheimer分子动力学(QM/MM-BOMD)模拟,全面表征了细菌蛋白YajL中Glu-Asp低势阱氢键(LBHB)中的共享质子/氘核,这是同源疾病相关的人类蛋白dj1中的常规氢键。质子化和过氘化的DJ-1和YajL的x射线键长分析显示,氘取代对这些羧酸-羧酸氢键没有显著影响,但在半胱氨酸硫酸酯附近的活性位点谷氨酸有影响。通过j -1中同源残基的突变,研究了YajL中可能有利于LBHB形成的h键网络中的残基。远端DJ-1取代增加了Glu-Asp氢键中的质子离域,表明扩展氢键网络中的突变可以调节羧酸-羧酸氢键中的质子转移屏障。此外,在YajL和DJ-1的QM/MM-BOMD模拟中,氢键中的质子迁移率与二聚体跨越运动相关。我们的研究结果表明,质子离域可以通过结合生物信息学、结构和计算信息进行调整,从而开启了利用工程质子离域作为氢键环境探针和测试LBHB功能假设的工具的可能性。
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引用次数: 0
Area-selective assembly of cell membrane/Ti3C2Tx MXene nanocomposites for biomimetic electrochemical detection 用于仿生电化学检测的细胞膜/Ti3C2Tx MXene纳米复合材料的区域选择性组装
IF 10.5 1区 生物学 Q1 BIOPHYSICS Pub Date : 2026-02-08 DOI: 10.1016/j.bios.2026.118507
Hongrae Kim , Yonghwan Kim , Jaeheung Kim , Hyunji Kim , Jae Won Jang , Seungmin Lee , Hyo Gi Jung , Jae Hyun Kim , Junho Bang , Ji Sung Yoon , Jeong Hoon Lee , Dongsung Park , Dae Sung Yoon , Kyo Seon Hwang
Cell membrane (CM) coating technology offers a promising strategy for developing biomimetic electronics, leveraging native cellular functionalities such as antifouling properties and receptor-mediated specificity. However, achieving uniform and stable CM deposition within precisely defined regions remains a significant challenge. Here, we present an area-selective CM coating approach that confines A549 lung carcinoma cells-derived membranes (AM) to photolithographically defined Ti3C2Tx MXene micropatterns. The hydrophilic surface of Ti3C2Tx, enriched with hydroxyl groups, promotes strong electrostatic interactions with the phospholipid headgroups, enabling the formation of a uniform and continuous MXene-directed CM coating. Fluorescence microscopy shows that AM coatings on MXene films effectively suppress nonspecific protein adsorption while preserving highly specific, receptor-mediated binding of SARS-CoV-2 from clinical samples via endogenous angiotensin-converting enzyme 2 (ACE2) receptors. Based on these features, we further integrated this biomimetic interface into an electrochemical biosensor by confining the MXene and AM layers to the working electrode. The AM-coated sensors exhibited excellent sensitivity for the S1 subunit of the SARS-CoV-2 spike protein, achieving a detection limit of 132 pM with high selectivity against various interfering molecules. Furthermore, the AM-on-MXene sensor successfully discriminated SARS-CoV-2 positive clinical samples from healthy controls, highlighting its clinical applicability. These results demonstrate a robust and scalable strategy for integrating biological membranes with 2D conductive nanomaterials, significantly broadening the potential of biointerface engineering in advanced bioelectronics.
细胞膜(CM)涂层技术为开发仿生电子学提供了一个很有前途的策略,利用天然细胞功能,如防污特性和受体介导的特异性。然而,在精确定义的区域内实现均匀稳定的CM沉积仍然是一个重大挑战。在这里,我们提出了一种区域选择性CM涂层方法,将A549肺癌细胞源膜(AM)限制在光刻定义的Ti3C2Tx MXene微模式上。Ti3C2Tx的亲水表面富含羟基,可促进与磷脂头基的强静电相互作用,从而形成均匀连续的mxene定向CM涂层。荧光显微镜显示,MXene膜上的AM膜有效抑制非特异性蛋白吸附,同时通过内源性血管紧张素转换酶2 (ACE2)受体保留了临床样品中高度特异性的受体介导的SARS-CoV-2结合。基于这些特征,我们进一步将这种仿生界面集成到电化学生物传感器中,将MXene和AM层限制在工作电极上。am包被传感器对SARS-CoV-2刺突蛋白S1亚基表现出优异的灵敏度,检测限为132 pM,对各种干扰分子具有高选择性。此外,AM-on-MXene传感器成功区分了SARS-CoV-2阳性临床样本和健康对照,突出了其临床适用性。这些结果展示了将生物膜与二维导电纳米材料集成的强大且可扩展的策略,显着拓宽了先进生物电子学中生物界面工程的潜力。
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引用次数: 0
A Bioinspired Optic-Neural Device with Neuromorphic Spatiotemporal Visual Perception for Dynamic Object Recognition 一种具有神经形态时空视觉感知的生物启发光学神经装置用于动态目标识别
IF 6.475 2区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2026-02-08 DOI: 10.1021/acs.jpclett.5c04067
Bo Wei,Yan Kang,Yongshun Xia,Yuhan Sun,Xiaotong Han,Bujia Liang,Yuanxi Peng,Liang Fang,Yabo Chen,Cheng Li,Xiaokuo Yang
Neuromorphic vision with integrated sensing, memorizing, and computing is considered a potential way to break through the high latency and storage bottlenecks of existing machine vision. However, simulating the human vision system with a single device to achieve spatiotemporal visual information perception remains a challenge. Hence, we demonstrated a bioinspired optic-neural device that achieves dynamic object recognition by simultaneously implementing encoding and sensing functions on molybdenum disulfide (MoS2). This device exhibits excellent optical synaptic plasticity originating from charge trapping and recombination in the device. The electrical output is weighted by the number of optical inputs, which reflects the history information on optical inputs. This mechanism is similar to the spatiotemporal information encoding ability of the lateral geniculate nucleus in the human vision system, enabling the device to remember historical visual information as well as achieve spatial resolution. Benefiting from the optic-neural device nonlinearly encoding and mapping a series of light inputs when arranged in an array, we achieved spatiotemporal visual information perception for dynamic object recognition similar to that of the human vision system. High classification accuracy up to 96.3% in five dynamic object data sets with high energy efficiency and low computational load are achieved based on such neuromorphic vision system. Our research findings have profound significance for promoting the advancement of existing machine vision systems.
集成传感、记忆和计算的神经形态视觉被认为是突破现有机器视觉高延迟和存储瓶颈的潜在途径。然而,用单一设备模拟人类视觉系统以实现时空视觉信息感知仍然是一个挑战。因此,我们展示了一种生物启发的光学神经装置,该装置通过在二硫化钼(MoS2)上同时实现编码和传感功能来实现动态物体识别。该器件表现出优异的光学突触可塑性,源于器件中的电荷捕获和重组。光输入的数量对电输出进行加权,反映了光输入的历史信息。该机制类似于人类视觉系统中外侧膝状核的时空信息编码能力,使设备在记忆历史视觉信息的同时实现空间分辨率。利用光学神经装置对一系列光输入进行非线性编码和映射,我们实现了类似于人类视觉系统的动态物体识别的时空视觉信息感知。基于该神经形态视觉系统对5个动态目标数据集的分类准确率高达96.3%,具有较高的能量效率和较低的计算负荷。我们的研究成果对于推动现有机器视觉系统的进步具有深远的意义。
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引用次数: 0
The Influence of the Solid-Electrolyte Interphase on Polyimide Anodes Probed by Operando Infrared Spectroscopy 固体-电解质界面对Operando红外光谱探测聚酰亚胺阳极的影响
IF 4.126 3区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2026-02-08 DOI: 10.1021/acs.jpcc.5c08226
Bin Feng,Haochen Sun,Yilin Zhao,Wei Wang,Yiming Zhao,Aimin Ge
The formation of the solid-electrolyte interphase (SEI) plays a critical role in the electrochemical performance and cycling stability of organic anode materials in lithium-ion batteries. In this study, we employ operando attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy to investigate the real-time dynamics of SEI formation on polyimide-based organic anodes during charging–discharging cycles. By comparing two commonly used carbonate-based and ether-based electrolytes, we reveal distinct differences in the composition and characteristics of the SEI. These distinct SEI characteristics lead to markedly different electrochemical performances. In ether-based electrolytes, the SEI is predominantly inorganic, facilitating efficient ion transport. The rapid capacity fade is predominated by the irreversible lithium-ion insertion reactions of aromatic ring structures. On the other hand, in carbonate-based electrolytes, the SEI is rich in organic components, leading to higher impedance. In this case, both irreversible carbonyl enolization and lithium-ion insertion into aromatic rings contribute to the rapid capacity fade.
固-电解质界面相(SEI)的形成对锂离子电池有机负极材料的电化学性能和循环稳定性起着至关重要的作用。在这项研究中,我们使用了operando衰减全反射傅立叶变换红外(ATR-FTIR)光谱来研究充放电循环过程中聚酰亚胺基有机阳极上SEI形成的实时动态。通过比较两种常用的碳酸基和醚基电解质,我们揭示了SEI的组成和特性的明显差异。这些不同的SEI特性导致了电化学性能的显著差异。在醚基电解质中,SEI主要是无机的,有助于有效的离子传输。容量快速衰减主要是由芳香环结构的不可逆锂离子插入反应引起的。另一方面,在碳酸基电解质中,SEI富含有机成分,导致更高的阻抗。在这种情况下,不可逆羰基烯醇化和锂离子插入芳香环都导致了容量的快速衰减。
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引用次数: 0
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