Solid State Sciences最新文献

Solvothermal design of hierarchically interdigitated TiO2 photoanodes with controlled nano-topology for efficient and scalable dye-sensitized solar cells 用于高效、可扩展染料敏化太阳能电池的可控纳米结构层次化二氧化钛光阳极的溶剂热设计

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2026-05-01 Epub Date: 2026-02-04 DOI: 10.1016/j.solidstatesciences.2026.108249

Syed Ezaz Haider Gilani , Khalil Harrabi , Rabia Nazar , Muhammad Farooq , Umer Mehmood , Muhammad Younas , Abdelkrim Mekki , Yong Zhang

The rational design of photosensitized solar cell (DSSCs) which is sensitive to improving the absorption of light, to transport the charges, and the stability of the structure is a key determinant to the development of the cell. This work describes the solvothermal synthesis of hierarchically interdigitated TiO₂ nanorod photoanodes with customized nanotopology, which are fabricated to maximize the movement of electrons and the ability to collect photons. The interdigitated architecture promotes directional charge transport, minimizes recombination losses, and significantly expands the active surface area for dye adsorption. XRD confirms the formation of nanorods with optimal crystallite size (∼36.7 nm), reduced lattice strain, and favorable oxygen vacancy concentrations. SEM analysis revealed vertically aligned nanorods with uniform dispersion and optimal inter-rod spacing, facilitating efficient electrolyte penetration. TEM characterization further confirmed high aspect ratio (≈10:1), defect-free lattice fringes, and single-crystalline nature of the nanorods. XPS deconvolution indicated the presence of Ti³⁺ species and controlled oxygen vacancies, contributing to improved electronic conductivity and dye anchoring. Upon integration into DSSC devices, the solvothermally derived TiO₂ photoanodes yielded a power conversion efficiency (PCE) of 5.90%, representing a 20.6% enhancement over standard cells. The improvement is attributed to enhanced short-circuit current density (20.37 mA/cm²), minimized series resistance (67.8 Ω), and optimized interfacial charge transfer resistance (147.2 Ω). These findings establish a direct structure–property–performance relationship, demonstrating that morphology-guided, defect-engineered TiO₂ architectures enable synergistic improvements in both photophysical and electrochemical behavior, providing a scalable platform for developing next-generation DSSCs with superior performance and stability.

光敏太阳能电池（DSSCs）的合理设计对提高光敏太阳能电池的光吸收能力、电荷传输能力和结构的稳定性至关重要。本研究描述了溶剂热合成具有定制纳米拓扑结构的层叠互指TiO2纳米棒光阳极的方法，该方法可以最大限度地提高电子的运动和收集光子的能力。互指结构促进定向电荷传输，最小化重组损失，并显着扩大染料吸附的活性表面积。XRD证实形成的纳米棒具有最佳晶粒尺寸（~ 36.7 nm）、晶格应变减小和有利的氧空位浓度。扫描电镜分析显示，垂直排列的纳米棒具有均匀的分散和最佳的棒间间距，有利于有效的电解质渗透。TEM表征进一步证实了纳米棒的高纵横比（≈10:1）、无缺陷晶格条纹和单晶性质。XPS反褶积表明Ti3+的存在和氧空位的控制，有助于提高电子导电性和染料锚定。在集成到DSSC器件中后，溶剂热衍生的TiO2光阳极产生了5.90%的功率转换效率（PCE），比标准电池提高了20.6%。这一改进归功于增强的短路电流密度（20.37 mA/cm2），最小化的串联电阻（67.8 Ω）和优化的界面电荷转移电阻（147.2 Ω）。这些发现建立了直接的结构-性能-性能关系，证明了形态引导、缺陷工程的TiO2结构可以协同改善光物理和电化学行为，为开发具有卓越性能和稳定性的下一代DSSCs提供了一个可扩展的平台。

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引用次数: 0

Electronic structure, magneto-oscillations and optical properties of bismuth selenide single crystals 硒化铋单晶的电子结构、磁振荡和光学性质

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2026-05-01 Epub Date: 2026-01-29 DOI: 10.1016/j.solidstatesciences.2026.108237

B.M. Fominykh , S.T. Baidak , A.N. Perevalova , E.I. Shreder , A.V. Lukoyanov , S.V. Naumov , E.B. Marchenkova , V.V. Marchenkov

We present a comprehensive experimental and theoretical study of the electronic structure, magneto-transport, and optical properties of bismuth selenide Bi₂Se₃ single crystals grown by the Bridgman-Stockbarger method. Despite being a prototypical topological insulator, the studied crystals exhibit metallic conductivity in the bulk due to a high electron concentration (∼10¹⁹ cm⁻³). Magneto-transport measurements reveal Shubnikov-de Haas oscillations with a frequency of 230 T. Analysis of the oscillation amplitude, phase, and their angular dependence in tilted magnetic fields demonstrates that these quantum oscillations originate from a three-dimensional Fermi surface with a trivial Berry phase, indicative of bulk charge carriers. We determine key electronic parameters, including the effective cyclotron mass, Dingle temperature, and quantum mobility. Intriguingly, a negative magnetoresistance is observed at high tilt angles, the origin of which is discussed. Optical measurements in the infrared to ultraviolet range further reveal a suppression of the Drude response and dominant interband transitions, consistent with low carrier concentration despite metallic transport and the calculated theoretical band structure, which indicates a low density of states at the Fermi energy. In the calculations, its value was adjusted to take into account the presence of bulk charge carriers in samples, this made it possible to plot the Fermi surface. The band inversion between Bi-6p and Se1-4p electronic states in Bi₂Se₃ is also calculated, as well as the Dirac cone structure in the surface modeling, which are characteristic of topological insulators. These results provide a complete picture of the electronic properties of bulk-conducting Bi₂Se₃, distinguishing the contributions from its trivial bulk states.

本文对采用Bridgman-Stockbarger方法生长的硒化铋Bi2Se3单晶的电子结构、磁输运和光学性质进行了全面的实验和理论研究。尽管是一种典型的拓扑绝缘体，但由于电子浓度高（~ 1019 cm−3），所研究的晶体在整体上表现出金属导电性。磁输运测量揭示了频率为230 t的舒布尼科夫-德哈斯振荡，对倾斜磁场中振荡幅度、相位及其角依赖性的分析表明，这些量子振荡起源于具有平凡贝里相位的三维费米表面，表明存在大量载流子。我们确定了关键的电子参数，包括有效回旋加速器质量、丁格尔温度和量子迁移率。有趣的是，在高倾斜角度下观察到负磁阻，并讨论了其起源。红外到紫外范围的光学测量进一步揭示了德鲁德响应的抑制和主要的带间跃迁，这与尽管金属输运和计算的理论能带结构的低载流子浓度一致，这表明费米能量处的态密度很低。在计算中，它的值被调整，以考虑样品中大量电荷载流子的存在，这使得绘制费米表面成为可能。计算了Bi2Se3中Bi-6p和Se1-4p电子态之间的能带反转，以及表面建模中的狄拉克锥结构，这是拓扑绝缘体的特征。这些结果提供了块体导电Bi2Se3的电子特性的完整图像，区分了其微不足道的块体状态的贡献。

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引用次数: 0

The seeding method: A test case for classical nucleation theory in small systems 播种法：经典成核理论在小系统中的一个检验案例

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2026-05-01 Epub Date: 2026-02-05 DOI: 10.1016/j.solidstatesciences.2026.108254

Thomas Philippe, Yijian Wu, Aymane Graini

Molecular dynamics simulations are widely used to investigate nucleation in first-order phase transitions. Brute-force simulations, though popular, are limited to conditions of high metastability, where the critical cluster and the nucleation barrier are small. The seeding method has recently emerged as a powerful alternative for exploring lower supersaturation regimes by initiating simulations with a pre-formed nucleus. In confined systems (NVT ensemble), the seeded simulations are particularly effective for determining stable cluster properties and provide a stringent test case for classical nucleation theory (CNT). In this work, we perform NVT seeded simulations of Lennard-Jones condensation in small systems and compare them with CNT predictions based on several thermodynamic models, including equations of state, perturbation theory, and ideal gas approximation. We find that CNT accurately predicts stable cluster radii across a wide range of conditions. Notably, even the very simple ideal gas approximation proves useful for initializing seeded simulations. Furthermore, seeded simulation results correspond to the critical cluster radii of infinite systems: CNT predictions with good equations of state show very good agreement with simulations, while the perturbation theory and the ideal gas approximation perform well at low temperatures but deviate significantly at high temperatures.

分子动力学模拟被广泛用于研究一阶相变中的成核。蛮力模拟虽然流行，但仅限于高亚稳的条件下，临界团簇和成核势垒很小。播种方法最近成为探索低过饱和状态的一种强有力的替代方法，通过预先形成的核启动模拟。在受限系统（NVT系综）中，种子模拟对于确定稳定簇的性质特别有效，并为经典成核理论（CNT）提供了严格的测试用例。在这项工作中，我们对小系统中的Lennard-Jones凝聚进行了NVT种子模拟，并将其与基于几种热力学模型（包括状态方程、微扰理论和理想气体近似）的碳纳米管预测进行了比较。我们发现碳纳米管在广泛的条件下准确地预测稳定的簇半径。值得注意的是，即使是非常简单的理想气体近似对于初始化种子模拟也是有用的。此外，种子模拟结果与无限系统的临界簇半径相对应：具有良好状态方程的碳纳米管预测与模拟结果非常吻合，而微扰理论和理想气体近似在低温下表现良好，但在高温下偏离明显。

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引用次数: 0

Acetic acid-modified MIL-125(Ti) photocatalysts for efficient degradation of tetracycline in seawater 醋酸改性MIL-125（Ti）光催化剂在海水中高效降解四环素的研究

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2026-05-01 Epub Date: 2026-01-31 DOI: 10.1016/j.solidstatesciences.2026.108234

Yubo Zhou , Zan Li , Junchao Yin , Liangmin Yu

Photocatalytic degradation of antibiotics in high-salinity seawater remains challenging due to salt ion interference and limited visible-light utilization. In this study, we developed a defect-rich titanium-based metal–organic framework (MIL-125(HAC)) through acetic acid modulation via a solvothermal method. The optimized MIL-125(HAC)-3 photocatalyst exhibited remarkable tetracycline (TC) degradation efficiency in seawater, reaching 90.9% after 60 min of visible-light irradiation (compared with 90.0% in deionized water) and maintaining over 85% efficiency after five cycles. This demonstrates its robust resistance to salt ion interference. Additionally, the degradation rate constant of MIL-125(HAC)-3 in seawater (0.0283 min⁻¹) was 25 times higher than that of commercial TiO₂, highlighting its superior photocatalytic performance. The enhanced performance is attributed to the introduction of acetic acid, which induced a rich mesoporous defect structure, facilitating selective TC adsorption and significantly broadening the visible light response range. Free radical trapping experiments and electron paramagnetic resonance (EPR) spectroscopy further revealed that superoxide radicals (•O₂⁻) and holes (h⁺) serve as the primary active species in the degradation process. This work offers a scalable and effective strategy for designing marine-tolerant photocatalysts to remediate antibiotic pollution.

由于盐离子干扰和可见光利用有限，高盐度海水中抗生素的光催化降解仍然具有挑战性。在这项研究中，我们通过溶剂热法通过乙酸调制开发了一种富缺陷的钛基金属有机骨架（MIL-125(HAC)）。优化后的MIL-125(HAC)-3光催化剂在海水中表现出显著的四环素（TC）降解效率，在可见光照射60 min后达到90.9%（在去离子水中为90.0%），5个循环后效率保持在85%以上。这证明了它对盐离子干扰的强大抵抗能力。此外，MIL-125(HAC)-3在海水中的降解速率常数（0.0283 min−1）是商用TiO2的25倍，显示出其优越的光催化性能。性能的增强归功于乙酸的引入，乙酸诱导了丰富的介孔缺陷结构，促进了TC的选择性吸附，并显着拓宽了可见光响应范围。自由基捕获实验和电子顺磁共振（EPR）谱进一步揭示了超氧自由基（•O2−）和空穴（h+）是降解过程中的主要活性物质。这项工作为设计海洋耐受光催化剂来修复抗生素污染提供了一种可扩展和有效的策略。

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引用次数: 0

Ag doping-induced surface functionalization of ZnO film for enhanced molecular orientation and electrical properties 银掺杂诱导ZnO膜的表面功能化以增强分子取向和电学性能

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2026-05-01 Epub Date: 2026-01-27 DOI: 10.1016/j.solidstatesciences.2026.108235

Dong Wook Lee , Dae-Hyun Kim , Dae-Shik Seo

In this study, a zinc oxide (ZnO) film doped with silver (Ag) nanoparticles is introduced and utilized as an alignment layer for liquid crystal (LC) molecules. The film was fabricated using a brush-based solution coating process, with Ag doping concentrations controlled at 0, 10, and 20 wt%. The optical transmittance of the Ag-doped ZnO films exceeded 82.9 %, demonstrating performance comparable to that of conventionally used indium-tin-oxide-coated glass, indicating their potential applicability in optoelectronic devices. Uniform LC alignment on the Ag-doped ZnO film was confirmed through polarized optical microscopy analysis, exhibiting excellent light controllability. The successful incorporation of Ag into the ZnO film was verified using X-ray photoelectron spectroscopy. Additionally, scanning electron microscopy and X-ray diffraction analyses revealed an anisotropic amorphous surface structure, attributed to the unidirectional movement of the brush hairs during coating. Ag doping in the ZnO film enhanced the polar anchoring energy of the LC layer, which is crucial for image stability. This improvement also contributed to a reduction in image sticking effects and a lower residual direct current voltage. Overall, these results demonstrate the feasibility of employing Ag-doped ZnO films as functional components in electronic devices.

在本研究中，引入了一种掺杂银纳米粒子的氧化锌（ZnO）薄膜，并将其用作液晶（LC）分子的对准层。薄膜的制备采用刷基溶液涂层工艺，银掺杂浓度控制在0、10和20 wt%。ag掺杂ZnO薄膜的透光率超过82.9%，其性能与传统的氧化铟锡镀膜玻璃相当，表明其在光电器件中的潜在适用性。通过偏光显微镜分析，证实了LC在ag掺杂ZnO薄膜上排列均匀，具有良好的光可控性。用x射线光电子能谱法验证了Ag在ZnO薄膜中的成功掺入。此外，扫描电镜和x射线衍射分析显示，涂层过程中刷毛的单向运动导致了非晶态表面结构的各向异性。Ag在ZnO薄膜中的掺杂增强了LC层的极性锚定能，这对图像稳定性至关重要。这一改进还有助于减少图像粘滞效应和降低剩余直流电压。总之，这些结果证明了在电子器件中使用掺杂ag的ZnO薄膜作为功能元件的可行性。

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引用次数: 0

Unveiling the effect of Eu2+ and Ce3+ activation on the first rare-earth oxonitridolithosilicate LiGd2Si3N5O2: Crystal structure and luminescence properties 揭示了Eu2+和Ce3+活化对第一种稀土氧硝基聚硅酸盐lid2si3n5o2晶体结构和发光性能的影响

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2026-05-01 Epub Date: 2026-02-04 DOI: 10.1016/j.solidstatesciences.2026.108240

Mike N. van Os , Kilian M. Rießbeck , Markus Seibald , Christiane Stoll , Hubert Huppertz

This research article provides structural and luminescence information for the first rare-earth oxonitridolithosilicate LiGd₂Si₃N₅O₂, as determined by single-crystal X-ray diffraction, Rietveld refinement, and spectroscopic investigations. The compound LiGd₂Si₃N₅O₂ crystallizes with similarities to the mineral melilite but in a novel structure type in the tetragonal space group

P \overline{4} 2_{1} m

(no. 113) with lattice parameters of a = 7.7178(1) Å, c = 4.9324(1) Å and a cell volume of V = 293.80(2) Å³. Upon activating with Eu²⁺, luminescence in the orange spectral region (λ_max = 644 nm, 1.93 eV, 15,528 cm⁻¹; fwhm = 225 nm, 0.66 eV, 5291 cm⁻¹) was observed. In addition, a blue emission (λ_max = 460 nm, 2.70 eV, 21,739 cm⁻¹; fwhm = 89 nm, 0.49 eV, 3912 cm⁻¹) could be measured on a single-crystal of LiGd₂Si₃N₅O₂:Ce³⁺. By comparison of LiGd₂Si₃N₅O₂:Ce³⁺ with literature known Ce³⁺ activated materials, this study investigates the hypothesis that the increase in size and distortion of the rare-earth coordination polyhedron within the distinct substance class correlates with a hypsochromic shift and a broadening of the emission band.

本文通过单晶x射线衍射、Rietveld细化和光谱研究，提供了第一颗稀土氧硝基硅烷的结构和发光信息。化合物lid2si3n5o2的结晶形式与矿物镁铝石相似，但在P4形式的四方空间群中以一种新颖的结构形式存在。晶格参数为a = 7.7178(1) Å， c = 4.9324(1) Å，胞体体积V = 293.80(2) Å3。用Eu2+活化后，在橙色光谱区（λmax = 644 nm, 1.93 eV, 15,528 cm−1;fwhm = 225 nm, 0.66 eV, 5291 cm−1）观察到发光。此外，在lid2si3n5o2:Ce3+单晶上可以测量到λmax = 460 nm, 2.70 eV, 21,739 cm−1;fwhm = 89 nm, 0.49 eV, 3912 cm−1。通过将LiGd2Si3N5O2:Ce3+与文献中已知的Ce3+活化材料进行比较，本研究探讨了在不同物质类别中稀土配位多面体尺寸和畸变的增加与次色移和发射带的加宽相关的假设。

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引用次数: 0

Laser printing of CdTe microstructures: spectroscopic and structural features 激光打印碲化镉微结构：光谱和结构特征

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2026-05-01 Epub Date: 2026-02-02 DOI: 10.1016/j.solidstatesciences.2026.108242

V.S. Zhigarkov , I.S. Volchkov , I.O. Koshelev , V.I. Yusupov

This article investigates the laser printing processes of cadmium telluride (CdTe) microparticles using the laser-induced forward transfer method and a nanosecond fiber laser source. Studies of the structural and optical characteristics of the obtained structures were carried out, including analysis by Raman spectroscopy, X-ray phase analysis, as well as atomic force and scanning electron microscopy. It is shown that the structure of the particles depends on the thickness of the source films, as well as on the transfer parameters. The formation of various modifications of CdTe, including cubic and hexagonal phases, as well as the formation of TeO₂ and Te precipitates, has been detected, which affects their properties and areas of application. An important result is the confirmation of the presence of luminescence in the printed structures, which indicates the preservation of their optical properties after laser transfer. It has been shown that the use of laser methods allows for the precise and controlled formation of structures on the surface of acceptor substrates which preserves their functional properties. The work demonstrates the potential of using laser methods to produce functional micro- and nanostructures with controlled structure and characteristics, which opens up new possibilities for their use in photonics, microelectronics, and biotechnology.

本文研究了利用激光诱导正向转移法和纳秒光纤激光源激光打印碲化镉（CdTe）微粒的工艺。对得到的结构进行了结构和光学特性的研究，包括拉曼光谱分析、x射线相分析、原子力和扫描电镜分析。结果表明，粒子的结构不仅取决于源膜的厚度，还取决于传递参数。检测到CdTe的各种修饰的形成，包括立方相和六方相，以及TeO2和Te沉淀的形成，这影响了它们的性能和应用领域。一个重要的结果是在印刷结构中确认了发光的存在，这表明激光转移后它们的光学性质得到了保存。研究表明，使用激光方法可以在受体衬底表面精确和受控地形成结构，从而保持其功能特性。这项工作证明了使用激光方法生产具有可控结构和特性的功能性微纳米结构的潜力，这为它们在光子学、微电子学和生物技术中的应用开辟了新的可能性。

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引用次数: 0

Tuning electrical properties of EVA polymer film by dual-doping CNT and SnO2 for cable applications 用CNT和SnO2双掺杂调整电缆用EVA聚合物薄膜的电学性能

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2026-05-01 Epub Date: 2026-02-10 DOI: 10.1016/j.solidstatesciences.2026.108255

Foziah F. Al-Fawzan , Amal F. Abd El-Gawad , S.A. Fayek , Mahmoud G.A. Saleh , Abdulaal Zuhayr Al-Khazaal , Nadiyah Alahmadi , A.I. Sharshir

This work examines the feasibility of integrating carbon nanotube (CNT) and tin oxide (SnO₂) nanoparticles into a poly(ethylene-co-vinyl acetate) (EVA) matrix to improve the durability of medium voltage cables. The integration of nanoparticles into the EVA insulation material aims to improve the electrical and dielectric properties of the cable. The nanocomposite films were made by dissolving EVA in tetrahydrofuran (THF) and incorporating a combination of 2 wt% SnO₂ nanoparticles and CNT at varying ratios (0.5%, 1%, and 1.5%). Fourier-transform infrared spectroscopy (FTIR) analysis validated the effective integration of the nanoparticles into the EVA matrix. The DC electrical conductivity has a value of (47∗10⁻¹⁰ S/m) for EVA/SnO₂@0.15 CNT. The dielectric characteristics of SnO₂ nanocomposites were examined, revealing that the sample with 1.5% CNT exhibited the highest AC conductivity (3.9 × 10⁻⁶ S/m), dielectric constant, and dielectric loss over the frequency spectrum. The Structural and morphological properties of the prepared flexible films were studied using XRD and SEM. The prepared SnO₂ by the sol-gel method has P4₂/mnm (136) space group, with a = 4.80500 Å and c = 3.20500 Å, and has the Tetragonal phase crystal planes PDF 01-080-6729. Also, it has a volume of 74.00A^o3 and a density of 6.764 g/cm³. Also, the thermal stability was investigated by TGA for the prepared flexible polymer films, and it increases with increasing CNT concentration.

本研究探讨了将碳纳米管（CNT）和氧化锡（SnO2）纳米颗粒整合到聚乙烯-醋酸乙烯酯（EVA）基体中以提高中压电缆耐久性的可行性。将纳米颗粒整合到EVA绝缘材料中，旨在改善电缆的电气和介电性能。通过将EVA溶解在四氢呋喃（THF）中，并以不同的比例（0.5%，1%和1.5%）加入2wt % SnO2纳米颗粒和碳纳米管的组合来制备纳米复合膜。傅里叶变换红外光谱（FTIR）分析验证了纳米颗粒与EVA矩阵的有效集成。EVA/SnO2@0.15碳纳米管的直流电导率值为（47 * 10−10 S/m）。研究了SnO2纳米复合材料的介电特性，结果表明，添加1.5%碳纳米管的样品在频谱上具有最高的交流电导率（3.9 × 10−6 S/m）、介电常数和介电损耗。利用XRD和SEM对制备的柔性薄膜的结构和形貌进行了研究。溶胶-凝胶法制备的SnO2具有P42/mnm（136）的空间基团，a = 4.80500 Å， c = 3.20500 Å，具有四方相晶体平面PDF 01-080-6729。此外，它的体积为74.00Ao3，密度为6.764 g/cm3。通过热重分析仪对制备的柔性聚合物薄膜的热稳定性进行了研究，发现薄膜的热稳定性随碳纳米管浓度的增加而增加。

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引用次数: 0

A natural fabric silk effectively inhibits the growth of lithium dendrites for Li metal batteries 天然织物丝有效抑制锂金属电池锂枝晶的生长

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2026-05-01 Epub Date: 2026-02-12 DOI: 10.1016/j.solidstatesciences.2026.108265

Qinghua Liu , Xuting Yuan , Ning Zhao , Xing Li , Jin-Peng Xue , Yanhong Zhu

Lithium (Li) metal is one of the most promising anode for the next generation of Li metal batteries owing to its high theoretical capacity (3860 mAh g⁻¹) and low electrode potential (−3.04 V vs the standard hydrogen electrode). However, the major obstacle of Li metal anode in practical applications is the growth of dendritic Li as evidenced by the poor Coulombic efficiency, the short cycle life and the safety concerns. Herein, a natural silk sinter with high graphitization and conductivity, was used as a protective film of lithium metal electrodes to effectively inhibit the dendrite growth by guiding uniform and homogeneous metallic Li deposition in Li symmetrical cells, which achieved a highly stable voltage profile for at least 800 h. The full cell composed of a LiFePO₄ cathode and a silk-film-modified Li anode exhibited low interfacial resistance and maintained a capacity of 131.7 mAh g⁻¹ after 400 cycles. This work highlights the ability of a protective film for dendrite-free Li metal anodes and provides a new and facile option for the practical application of Li metal batteries.

锂（Li）金属由于其高理论容量（3860 mAh g - 1）和低电极电位（- 3.04 V vs标准氢电极）而成为下一代锂金属电池最有前途的阳极之一。然而，锂金属阳极在实际应用中的主要障碍是枝晶锂的生长，表现为库仑效率差、循环寿命短和安全性问题。,天然丝绸烧结石墨化和电导率高,被用作保护膜的锂金属电极能够有效地抑制树突增长李指导制服和均匀的金属沉积在李对称细胞,达到一个高度稳定的电压概要文件至少800 h。完整的细胞组成的磷酸铁锂阴极和李silk-film-modified阳极表现出较低的界面电阻和维护一个容量为131.7 mAh g−1 400年以后周期。这项工作强调了保护膜对无枝晶锂金属阳极的保护能力，为锂金属电池的实际应用提供了一种新的、简便的选择。

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引用次数: 0

Self-supported tri-layer NiFe-LDH/GO/Ni3S2 on nickel foam for enhanced and durable alkaline OER 泡沫镍上自支撑三层NiFe-LDH/GO/Ni3S2增强持久碱性OER

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2026-05-01 Epub Date: 2026-02-11 DOI: 10.1016/j.solidstatesciences.2026.108260

Yun Seok Jang, Ji Woo Jang, Ye In Kim, Jeong Ho Ryu

Durable oxygen evolution at practical current densities demands electrodes that integrate efficient charge pathways with mechanically coherent interfaces. We report a self-supported tri-layer NiFe-LDH/GO/Ni₃S₂ architecture on Ni foam constructed by sequential sulfurization (Ni₃S₂ backbone), solution-phase GO deposition (π-conjugated wiring/strain buffer), and low-temperature hydrothermal growth of NiFe-LDH nanosheets. XRD, FE-SEM, and XPS verify the stacked phases and mixed Ni/Fe valence typical of catalytically competent (oxy)hydroxides. The tri-layer electrode delivers η₅₀ = 150 mV and η₁₀₀ = 203 mV with a 55 mV·dec⁻¹ Tafel slope, surpassing a GO-free NiFe-LDH/Ni₃S₂ control. Impedance analysis shows the smallest semicircle (lowest R_ct), while non-faradaic CVs yield the largest C_dl/ECSA, correlating the performance gains with multi-interface charge wiring and enhanced active-site accessibility. During CP operation at 50 mA cm⁻² for 300 h, the electrode maintains 100.38% of its initial operating potential with an ultralow potential drift of −0.0195 mV h⁻¹. Crucially, the electrode also exhibits robust durability at a higher current density of 100 mA cm⁻² for 100 h, confirming stable catalytic operation beyond the initial oxidation regime. Collectively, the results outline a generalizable strategy to wire NiFe-LDH nanophases to 3D scaffolds through a conductive sulfide backbone and an atomically thin carbon interlayer, advancing electrode-level design principles for fast and durable alkaline OER.

在实际电流密度下，持久的析氧要求电极将有效的电荷路径与机械相干界面集成在一起。通过顺序硫化（Ni3S2骨架）、液相氧化石墨烯沉积（π共轭线/应变缓冲）和低温水热生长NiFe-LDH纳米片，在Ni泡沫上构建了自支撑的三层NiFe-LDH/GO/Ni3S2结构。XRD， Fe - sem和XPS验证了具有催化活性（氧）氢氧化物典型的堆叠相和混合Ni/Fe价态。该三层电极的η值分别为50 = 150 mV和100 = 203 mV， Tafel斜率为55 mV·dec−1，优于不含氧化石墨烯的NiFe-LDH/Ni3S2。阻抗分析显示最小的半圆（最低的Rct），而非faradaic cv产生最大的Cdl/ECSA，将性能增益与多接口充电接线和增强的活性位点可达性相关联。在50 mA cm−2条件下工作300 h时，电极保持了其初始工作电位的100.38%，并具有- 0.0195 mV h−1的超低电位漂移。至关重要的是，该电极在100 mA cm−2的高电流密度下也表现出强大的耐用性，持续100小时，证实了在初始氧化状态之外的稳定催化操作。总的来说，研究结果概述了一种通过导电硫化物骨架和原子薄碳夹层将nfe - ldh纳米相连接到3D支架的通用策略，推进了快速耐用碱性OER的电极级设计原则。

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