Applied Surface Science最新文献_第10页

Enhancing supercapacitor performance through rapid charge transport induced by magnetic field-driven spin polarization 通过磁场驱动的自旋极化诱导快速电荷传输提高超级电容器性能

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2024-11-03 DOI: 10.1016/j.apsusc.2024.161690

Xiaobing Xu , Chensi Zhou , Yaqi Peng , Duanduan Liu , Lei Zhang , Shiming Yan , Xinglong Wu

Magnetic supercapacitors have garnered significant attention, with notable progress in recent years. However, the underlying mechanisms remain unclear and require further investigation for future energy storage applications. In this study, we designed and fabricated Mn-Fe₂O₃/reduced graphene oxide (Mn-Fe₂O₃/rGO) nanostructures by employing heteroatom doping and interface engineering. Theoretical calculations showed that incorporating Mn²⁺ into Fe₂O₃ modulates electron localization around Fe atoms, leading to spin polarization in Fe 3d orbital electrons. Our experiments demonstrated that the optimized Mn-Fe₂O₃/rGO nanostructure processes ferromagnetic properties with a negative magnetoresistance effect at room temperature, suggesting that substantial spin-polarized charges rapidly participate in surface charge–discharge reactions under an applied magnetic field. This phenomenon resulted in a remarkable specific capacitance of 2956.4 F g⁻¹ at 1 A g⁻¹, along with superior cyclic stability. Additionally, the asymmetric supercapacitor device achieved an energy density of 220.19 W h kg⁻¹ at a power density of 3.93 kW kg⁻¹, with excellent capacitance retention of 98.5 % after 5000 cycles. This work paves the way for improving the performance of magnetic supercapacitors based on metal oxide electrode materials.

磁性超级电容器备受关注，近年来取得了显著进展。然而，其基本机理仍不清楚，需要进一步研究，以适应未来的储能应用。在本研究中，我们利用杂原子掺杂和界面工程设计并制造了锰-Fe2O3/还原氧化石墨烯（Mn-Fe2O3/rGO）纳米结构。理论计算表明，在 Fe2O3 中掺入 Mn2+ 会改变铁原子周围的电子定位，从而导致铁 3d 轨道电子的自旋极化。我们的实验表明，优化的 Mn-Fe2O3/rGO 纳米结构具有铁磁特性，在室温下具有负磁阻效应，这表明在外加磁场作用下，大量自旋极化电荷迅速参与了表面电荷放电反应。这种现象导致在 1 A g-1 的条件下，比电容高达 2956.4 F g-1，并具有卓越的循环稳定性。此外，在功率密度为 3.93 kW kg-1 时，不对称超级电容器装置的能量密度达到 220.19 W h kg-1，5000 次循环后电容保持率高达 98.5%。这项工作为提高基于金属氧化物电极材料的磁性超级电容器的性能铺平了道路。

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引用次数: 0

Removing low-concentration methane via thermo-catalytic oxidation on CuOx/zeolite 在氧化铜/沸石上通过热催化氧化去除低浓度甲烷

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2024-11-03 DOI: 10.1016/j.apsusc.2024.161691

Yuyin Wang , Yun Wang , Zihan Liu , Ying Li , Lin Yao , Shibo Shao , Xianfeng Fan , Tingzhen Ming , Xiaohua Lu , Liwen Mu , Wei Li

Methane (CH₄) is the second most potent greenhouse gas that exists largely in low concentrations. This fact, coupled with its inert nature, brings both urgency and challenge for any mitigations (including thermo-catalytic oxidation). In this study, we address this challenge by synthesizing highly dispersed CuO_x species (∼6 wt%) loaded on mordenite zeolite (MOR), and enhancing the catalytic performance for the thermal oxidation of low-concentration CH₄. The optimized sample, Cu-MOR-11, demonstrates exceptional catalytic properties, including high activity with 100 % CH₄ total oxidation to CO₂ at 400 °C, low reaction temperature with a T₁₀ at 230 °C and T₉₀ at 350 °C, as well as excellent long-term stability and reusability over a 100-hour reaction period. These attributes make it a promising candidate for large scale CH₄ oxidation applications. To elucidate the mechanisms behind the enhanced catalytic performance of Cu-MOR-11, we conclude, 1) the generation of more Brønsted acid sites which facilitated the absorption and dissociation of CH₄; 2) the presence of Al³⁺ as acid sites in the MOR supports played a crucial role in achieving high CuO_x species dispersion, acting as anchoring sites to effectively stabilize and disperse CuO_x species, which provides more active sites; 3) variation in preparation environments (e.g., pH) led to different oxidation states of the catalysts, with alkaline conditions facilitating the deoxidation of CuO_x species, resulting in more Cu⁺&Cu⁰ compared to CuO; 4) the presence of Brønsted acid sites which mitigated coking at low temperatures and prevented the loss of structural stability at high temperatures.

甲烷（CH4）是第二大强效温室气体，主要以低浓度存在。这一事实加上其惰性，给任何减排措施（包括热催化氧化）带来了紧迫性和挑战性。在本研究中，我们通过合成负载在莫来石沸石（MOR）上的高分散 CuOx 物种（∼6 wt%）来应对这一挑战，并提高低浓度 CH4 热氧化的催化性能。优化后的 Cu-MOR-11 样品具有优异的催化性能，包括高活性（400 ℃ 时可将 100% 的 CH4 全部氧化为 CO2）、低反应温度（T10 为 230 ℃，T90 为 350 ℃）以及出色的长期稳定性和 100 小时反应期的重复使用性。这些特性使其成为大规模甲烷氧化应用的理想候选物质。为了阐明 Cu-MOR-11 催化性能增强背后的机理，我们得出以下结论：1）更多布氏酸位点的产生促进了 CH4 的吸收和解离；2）MOR 支撑物中 Al3+ 作为酸位点的存在对实现 CuOx 物种的高度分散起到了至关重要的作用，它作为锚定位点有效地稳定和分散了 CuOx 物种，从而提供了更多的活性位点；3）制备环境（如 pH 值）的变化导致了不同的氧化态、3）制备环境（如 pH 值）的不同导致催化剂的氧化态不同，碱性条件有利于 CuOx 物种的脱氧，从而产生比 CuO 更多的 Cu+&Cu0；4）布氏酸位点的存在减轻了低温下的结焦，并防止了高温下结构稳定性的丧失。

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引用次数: 0

Surface iron concentration gradient: A strategy to suppress Mn3+ Jahn-Teller effect in lithium manganese iron phosphate 表面铁浓度梯度：抑制磷酸锰铁锂中 Mn3+ Jahn-Teller 效应的策略

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2024-11-03 DOI: 10.1016/j.apsusc.2024.161689

Zhen Li , Yang You , Zhiqi Zhu , Lianghua Wang , Shengwen Ou , Jingyue Xu , Mingliang Yuan

To address the low energy density of LiFePO₄ (LFP) for electric vehicles and high-voltage energy storage, LiMn_0.5Fe_0.5PO₄ (LMFP) provides a potential solution but faces performance degradation due to Mn³⁺-induced Jahn-Teller distortion and Mn ion dissolution during cycling. This study proposes a surface engineering strategy to enhance LMFP’s electrochemical performance by increasing surface iron concentration and reducing manganese content, based on the electronic differences between Mn³⁺ and Fe³⁺ in MO₆ octahedra. Density Functional Theory (DFT) calculations confirmed the viability of this approach by analyzing volume changes and binding energies with HF during charging. Guided by DFT, an LMFP@LFP/C material was synthesized with a high-iron-concentration surface layer (∼2 nm), as observed through AC-STEM. Post-cycling TEM analysis and corrosion simulations demonstrated that LMFP@LFP/C suppresses Mn ion dissolution and stabilizes the crystal lattice compared to unmodified LMFP/C. Electrochemical tests showed that LMFP@LFP/C has superior electronic conductivity and faster lithium-ion diffusion. It delivered an initial discharge capacity of 150.82 mAh g⁻¹ at 0.1C, surpassing LMFP/C (147.65 mAh g⁻¹). At 1C, LMFP@LFP/C retained 95.85 % of its capacity after 500 cycles, significantly outperforming LMFP/C (74.18 %). This surface modification strategy advances phosphate-based cathode materials for electric vehicles and renewable energy applications.

为了解决用于电动汽车和高压储能的 LiFePO4（LFP）能量密度低的问题，LiMn0.5Fe0.5PO4（LMFP）提供了一种潜在的解决方案，但由于 Mn3+ 引发的 Jahn-Teller 畸变和循环过程中的锰离子溶解，LMFP 面临着性能下降的问题。本研究根据 Mn3+ 和 Fe3+ 在 MO6 八面体中的电子差异，提出了一种通过增加表面铁浓度和减少锰含量来提高 LMFP 电化学性能的表面工程策略。密度泛函理论（DFT）计算通过分析充电过程中的体积变化和与 HF 的结合能，证实了这种方法的可行性。在 DFT 的指导下，合成了一种 LMFP@LFP/C 材料，并通过 AC-STEM 观察到其具有高浓度铁表面层（2 nm）。循环后的 TEM 分析和腐蚀模拟表明，与未改性的 LMFP/C 相比，LMFP@LFP/C 可抑制锰离子溶解并稳定晶格。电化学测试表明，LMFP@LFP/C 具有优异的电子导电性和更快的锂离子扩散速度。它在 0.1C 时的初始放电容量为 150.82 mAh g-1，超过了 LMFP/C（147.65 mAh g-1）。在 1C 条件下，LMFP@LFP/C 在循环 500 次后仍能保持 95.85% 的容量，明显优于 LMFP/C（74.18%）。这种表面改性策略推动了磷酸盐基阴极材料在电动汽车和可再生能源领域的应用。

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引用次数: 0

Electrical properties and conduction mechanisms of ε-GaSe films for selector and phase-change memory applications 用于选择器和相变存储器的ε-GaSe 薄膜的电学特性和传导机制

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2024-11-02 DOI: 10.1016/j.apsusc.2024.161642

So-Young Lim , Chohyeon Park , Dae-Hyung Cho , Tae-Ha Hwang , Yong-Duck Chung , Woo-Jung Lee , Jung-Wook Lim

Owing to the pressing requirement for advanced memory solutions driven by explosive data growth, nonvolatile and fast-operating 1S1R structured XPoint memory has become a prominent focus, with recent interest shifting towards the 1S structured selector-only memory. The use of chalcogenide-based materials in these technologies constrains the application of such memories because of their complex quaternary compositions. This study investigated the previously unreported potential of GaSe, a simple binary Se-based chalcogenide, for applications as a selector and phase-change memory (PCM). In this study, ε-GaSe thin films were deposited using thermal evaporation and subsequently annealed in a Se atmosphere for 1 and 2 h. These ε-GaSe thin film devices incorporated metal–insulator–metal construction to exhibit both selector and PCM characteristics. The ε-GaSe device that was Se-annealed for 1 h demonstrated superior performance with a lower threshold voltage and off current, high selectivity as a selector, and reduced set voltage and reset power as a PCM. These characteristics render the proposed device a highly promising candidate for dual selector/PCM applications. To explain the electrical behavior of the ε-GaSe device, we propose the conduction mechanism model depending on the Se-annealing time, which is related to the change in the physical properties of ε-GaSe.

由于数据爆炸式增长对先进存储器解决方案的迫切需求，非易失性和快速运行的 1S1R 结构 XPoint 存储器已成为一个突出的焦点，最近人们的兴趣转向了 1S 结构纯选择器存储器。在这些技术中使用的是基于卤化镓的材料，由于其复杂的四元成分，限制了此类存储器的应用。本研究调查了以前未报道过的硒化镓（一种简单的二元硒基胆化物）作为选择器和相变存储器（PCM）的应用潜力。在这项研究中，ε-GaSe 薄膜采用热蒸发法沉积，随后在硒气氛中退火 1 小时和 2 小时。这些ε-GaSe 薄膜器件采用金属-绝缘体-金属结构，同时具有选择器和 PCM 特性。经过 1 小时硒退火处理的ε-GaSe 器件性能优越，具有较低的阈值电压和关断电流，作为选择器具有较高的选择性，作为 PCM 具有较低的设定电压和复位功率。这些特性使所提出的器件成为双选择器/PCM 应用中极具潜力的候选器件。为了解释ε-GaSe 器件的电学行为，我们提出了与ε-GaSe 物理性质变化有关的传导机制模型，该模型取决于硒退火时间。

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引用次数: 0

Understanding the adsorption mechanism of benzotriazole and its derivatives as effective corrosion inhibitors for cobalt in chemical mechanical polishing 了解苯并三唑及其衍生物在化学机械抛光中作为钴的有效缓蚀剂的吸附机理

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2024-11-02 DOI: 10.1016/j.apsusc.2024.161684

Jie Cheng , Yaran Lv , Fan Zhang , Peng Han , Qinhua Miao , Zhenxiang Huang

Cobalt is emerging as the next-generation interconnect material to replace copper for integrated circuit sub-10 nm technology nodes. Due to its susceptibility to corrosion, identifying effective corrosion inhibitors for Co during the chemical mechanical polishing (CMP) is crucial. In this study, theoretical computations and experimental approaches were employed to investigate the corrosion inhibition effects of benzotriazole (BTA) and its derivatives—methylbenzotriazole (TTA) and 5-carboxybenzotriazole—on Co surfaces. Quantum chemical calculations and molecular dynamics simulations were used to reveal the corrosion mechanism at the atomic level. The computational findings were further validated by electrochemical experiments. Among the inhibitors studied, TTA exhibited the highest adsorption affinity for the Co surface, achieving an inhibition efficiency of up to 91.71 %. This is attributed to the formation of a dense protective layer on the Co surface through both physical adsorption via intermolecular forces and chemical adsorption via charge transfer. CMP experiments demonstrated that all three inhibitors significantly reduce the material removal rate (MRR) of Co. Notably, when the TTA concentration reaches 9 mM, the MRR is reduced to 132.64 nm/min, meeting the requirements for Co bulk polishing. These findings suggest that TTA is a highly promising Co corrosion inhibitor for slurry development in CMP processes.

钴正在成为取代铜的下一代互连材料，用于 10 纳米以下技术节点的集成电路。由于钴易腐蚀，在化学机械抛光（CMP）过程中确定有效的钴腐蚀抑制剂至关重要。本研究采用理论计算和实验方法研究了苯并三唑（BTA）及其衍生物-甲基苯并三唑（TTA）和 5-羧基苯并三唑对 Co 表面的缓蚀效果。量子化学计算和分子动力学模拟用于揭示原子水平的腐蚀机理。电化学实验进一步验证了计算结果。在所研究的抑制剂中，TTA 对 Co 表面的吸附亲和力最高，抑制效率高达 91.71%。这是因为通过分子间作用力的物理吸附和电荷转移的化学吸附，在 Co 表面形成了一层致密的保护层。CMP 实验表明，这三种抑制剂都能显著降低 Co 的材料去除率 (MRR)，尤其是当 TTA 浓度达到 9 mM 时，MRR 降至 132.64 nm/min，满足了 Co 的批量抛光要求。这些研究结果表明，TTA 是一种非常有前途的 Co 腐蚀抑制剂，可用于 CMP 工艺中的浆料开发。

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引用次数: 0

Tungsten interior doping engineering induced sulfur vacancies of MoS2 for efficient charge transfer and nonlinear optical performance: Implications for optical limiting devices 钨内部掺杂工程诱导 MoS2 的硫空位，实现高效电荷转移和非线性光学性能：对光限制器件的影响

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2024-11-02 DOI: 10.1016/j.apsusc.2024.161686

Xiao-Yu Chen, Yuan Zhao, Zi-Han Liu, Yi-Tong Pang, Di-Gen Wei, Jing-Yi Wangchen, Cheng-Bao Yao

Modulating the photoelectric properties of molybdenum disulfide (MoS₂) through defect engineering and heterometal doping is crucial for its potential applications in electronic and optoelectronic devices. Herein, a comprehensive overview is provided on the advancements of two-dimensional materials with a ternary structure comprising sulfur (S), molybdenum (Mo), and tungsten (W) in the field of optoelectronic device. A ternary W-P/MoS₂ (P: direct current target power) nanomaterial was designed and synthesized using W interior doping engineering induced S vacancies. The experimental results reveal that the introduction of W metal causes lattice distortion in MoS₂, leading to the formation of S vacancies within W-P/MoS₂. Compared to pure MoS₂, W-P/MoS₂ with S vacancies demonstrates enhanced reverse saturable absorption and optical limiting. Density functional theory calculations suggest that the S vacancies introduced by W doping in MoS₂ introduce defect energy levels, which are believed to be the reason for the improved nonlinear optical (NLO) performance of W-P/MoS₂. Furthermore, transient absorption spectroscopy reveals the photophysical model of carrier relaxation and presents an explanation for the optimized NLO properties of W-P/MoS₂. This work provides a novel strategy for the design and synthesis of ternary transition metal dichalcogenides and modulating the NLO properties by doping transition metal-mediated vacancies.

通过缺陷工程和杂金属掺杂来调节二硫化钼（MoS2）的光电特性对其在电子和光电设备中的潜在应用至关重要。本文全面概述了由硫（S）、钼（Mo）和钨（W）组成的三元结构二维材料在光电器件领域的研究进展。利用 W 内部掺杂工程诱导 S 空位，设计并合成了一种三元 W-P/MoS2（P：直流目标功率）纳米材料。实验结果表明，W 金属的引入会导致 MoS2 的晶格畸变，从而在 W-P/MoS2 中形成 S 空位。与纯 MoS2 相比，含有 S 空位的 W-P/MoS2 具有更强的反向饱和吸收和光学限制。密度泛函理论计算表明，MoS2 中掺入 W 后形成的 S 空位引入了缺陷能级，这被认为是 W-P/MoS2 非线性光学（NLO）性能提高的原因。此外，瞬态吸收光谱揭示了载流子弛豫的光物理模型，并解释了 W-P/MoS2 优化非线性光学性能的原因。这项工作为设计和合成三元过渡金属二钙化物以及通过掺杂过渡金属介导的空位来调节 NLO 性能提供了一种新策略。

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引用次数: 0

GPa level pressures on the microstructure evolution of eutectic high-entropy alloys CoCrFeNi(TiNb)0.325 and corrosion resistance GPa 级压力对共晶高熵合金 CoCrFeNi(TiNb)0.325 的微观结构演变和耐腐蚀性的影响

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2024-11-02 DOI: 10.1016/j.apsusc.2024.161652

Yulei Deng , Ziyan Li , Xiaohong Wang , Tengfei Ma , Duo Dong , Dongdong Zhu

In this study, high-pressure solidification (HPS) was used to systematically investigate the microstructure evolution and corrosion resistance of the designed eutectic high-entropy alloy CoCrFeNi(TiNb)_0.325 under ambient pressure, 4 GPa and 7 GPa. With increasing solidification pressure, the eutectic component points continue to move toward the upper left of the phase diagram, and the microstructure of the EHEA changes from eutectic under AP to hypereutectic at 4 GPa. Finally, the eutectic lamellar structure disappears under 7 GPa pressure, and the microstructure shows a divorced eutectic morphology. Mott–Schottky and XPS analyses revealed that the passivation film defect density of the HPS sample was lower than that of the other samples, but because the increase in the FCC/Laves phase spacing promoted pitting nucleation, the sample was difficult to repassivate, thus weakening the pitting corrosion resistance of the HPS sample. This work provides new insights into the relationships among pressure, microstructure, and corrosion performance.

本研究采用高压凝固（HPS）系统研究了设计共晶高熵合金 CoCrFeNi(TiNb)0.325 在环境压力、4 GPa 和 7 GPa 下的微观结构演变和耐腐蚀性能。随着凝固压力的增加，共晶成分点继续向相图的左上方移动，EHEA 的微观结构从 AP 下的共晶转变为 4 GPa 下的超共晶。最后，共晶片状结构在 7 GPa 压力下消失，微观结构呈现出离析共晶形态。Mott-Schottky 和 XPS 分析表明，HPS 样品的钝化膜缺陷密度低于其他样品，但由于 FCC/Laves 相距的增加促进了点蚀成核，样品难以再钝化，从而削弱了 HPS 样品的抗点蚀能力。这项研究为压力、微观结构和腐蚀性能之间的关系提供了新的见解。

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引用次数: 0

Investigation of the effects of an excess of Ca2+ and Mg2+ ions in low salinity water in the process of oil removal, dissolution, and solvation in calcites 调查低盐度水中过量 Ca2+ 和 Mg2+ 离子对钙钛矿除油、溶解和溶解过程的影响

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2024-11-02 DOI: 10.1016/j.apsusc.2024.161645

L.I.M. Sinimbu , E. Annese , J.M. Loreto , L.S. Lima , A.C.M. Teixeira , L.G. Pedroni , F. Stavale

The transition from an oil-wet to a water-wet calcite surface is crucial for enhanced oil recovery and can be influenced by low salinity (LS) water. While previous studies have explored the effects of LS water or single-ion solutions on rock-oil interfaces, the impact of excess active ions in LS on wettability remains uncertain. This work aims to determine whether Ca²⁺ or Mg²⁺ ions are more effective in altering wettability and oil recovery and to identify the optimal salinity for the Nujol-calcite system. Oil-wet calcite surfaces were characterized before and after treatment with LS water rich in Ca²⁺ or Mg²⁺, diluted 25, 50, 75, and 100 times (LS25, LS50, LS75, and LS100) compared to formation water. LS75, with a salinity of 3173 ppm, was the most effective for oil removal, achieving 81 % oil recovery. LS75Mg removed 75 % of the oil, and LS75Ca removed 65 %, as confirmed by ATR-FTIR and contact angle measurements. LS75Mg also showed a larger contact angle (∼160°) than LS75Ca (145°), indicating better oil detachment. Surface changes, including dissolution and oil fragmentation (especially with LS75Mg and LS100Mg), were observed via topographical analysis. XPS results revealed higher Na⁺, Cl⁻, and Mg²⁺ levels on treated surfaces, with LS50Mg showing the most significant reduction of surface carbon content. While a combination of Ca²⁺ and Mg²⁺ at optimal salinity enhances oil removal, excess Mg²⁺ alone is less effective. The competitive mechanisms behind oil removal and their dependence on brine composition are discussed.

从油湿方解石表面到水湿方解石表面的转变对于提高石油采收率至关重要，而且会受到低盐度（LS）水的影响。以往的研究探讨了低盐水或单离子溶液对岩油界面的影响，但低盐水中过量的活性离子对润湿性的影响仍不确定。这项工作旨在确定 Ca2+ 或 Mg2+ 离子在改变润湿性和石油采收率方面是否更有效，并确定 Nujol 方解石系统的最佳盐度。使用富含 Ca2+ 或 Mg2+ 的 LS 水（LS25、LS50、LS75 和 LS100）处理油湿方解石表面之前和之后的特征，与地层水相比，LS 水稀释了 25、50、75 和 100 倍（LS25、LS50、LS75 和 LS100）。盐度为 3173 ppm 的 LS75 除油效果最好，采油率达到 81%。经 ATR-FTIR 和接触角测量证实，LS75Mg 可去除 75% 的油，LS75Ca 可去除 65% 的油。与 LS75Ca（145°）相比，LS75Mg 的接触角（∼160°）也更大，这表明它的脱油效果更好。通过地形分析可观察到表面变化，包括溶解和油破碎（尤其是 LS75Mg 和 LS100Mg）。XPS 结果显示，处理过的表面 Na+、Cl- 和 Mg2+ 含量较高，其中 LS50Mg 表面碳含量的减少最为显著。在最佳盐度下，Ca2+ 和 Mg2+ 的组合可提高除油效果，而过量的 Mg2+ 单独使用则效果较差。本文讨论了油类去除背后的竞争机制及其对盐水成分的依赖性。

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引用次数: 0

Microwave-assisted vanadium interpolated cobalt-MOF cathode assembled 3 V high performing asymmetric supercapacitor with ionic liquid gel polymer electrolyte 微波辅助钒插值钴-MOF 阴极与离子液体凝胶聚合物电解质组装 3 V 高性能不对称超级电容器

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2024-11-02 DOI: 10.1016/j.apsusc.2024.161682

Monojit Mondal , Arkaprava Datta , Tarun Kanti Bhattacharyya

To ameliorate energy storage and conversion, metal synergy, and structural stability, bimetal-assembled metal–organic frameworks (MOFs) are delved into. Augmented surface area, pseudo capacitance, and the ability to alter the MOF edifice of layered oxide have drawn interest in MOF-based oxide layered structures. Simple microwave and hydrothermal techniques use dimethyl formamide and water as solvents and annealing methods to generate the bimetallic organic framework’s Co₃V₂O₈ and Co₃VO₄ cathode material. Those customized shapes boost redox sites and reduce ion electron distance. Due to cobalt’s faradaic process and vanadium’s highly layered attributes, supercapacitor electrode response is significant. Co₃V₂O₈ has 1391F/g specific capacitance at 2 mV/s scan rate and 1309F/g at 4 mA/cm² implemented current value. After 10,000 cycles, the cathode material depicts 89 % capacity retention and 98 % coulombic efficiency. Biowaste-derived activated carbon is combined with a Co₃V₂O₈ cathode for asymmetric supercapacitor storage. That device works on 3 V windows with ionic liquid gel polymer electrolyte. With a maximum specific energy of 329.3 Wh/kg and specific power of 15250 W/kg, the achieved galvanometric capacitance is 263.5F/g and 220 mAh/g at the 9 mA/cm² current and showed 88.5 % potential stability after 10,000 cycles. These findings corroborate its use as a supercapacitor cathode.

为了改善能量存储和转换、金属协同作用和结构稳定性，双金属组装金属有机框架（MOFs）得到了深入研究。基于 MOF 的分层氧化物结构具有增大表面积、伪电容以及改变 MOF 结构的能力等特点，这引起了人们的兴趣。简单的微波和水热技术使用二甲基甲酰胺和水作为溶剂和退火方法，生成了双金属有机框架的 Co3V2O8 和 Co3VO4 阴极材料。这些定制的形状增加了氧化还原位点，减少了离子电子距离。由于钴的法拉第过程和钒的高分层属性，超级电容器电极的响应非常显著。Co3V2O8 在 2 mV/s 扫描速率下的比电容为 1391F/g，在 4 mA/cm2 实施电流值下的比电容为 1309F/g。经过 10,000 次循环后，阴极材料的容量保持率为 89%，库仑效率为 98%。生物废料衍生活性炭与 Co3V2O8 阴极相结合，用于非对称超级电容器存储。该装置使用离子液体凝胶聚合物电解质在 3 V 窗口工作。该装置的最大比能量为 329.3 Wh/kg，比功率为 15250 W/kg，在 9 mA/cm2 电流下的电容为 263.5F/g 和 220 mAh/g，并在 10,000 次循环后显示出 88.5% 的电位稳定性。这些发现证实了其作为超级电容器阴极的用途。

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引用次数: 0

High-temperature crack resistance of yttria-stabilized zirconia coatings enhanced by interfacial stress transfer 通过界面应力传递增强钇稳定氧化锆涂层的高温抗裂性

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2024-11-02 DOI: 10.1016/j.apsusc.2024.161688

Zhichen Meng , Weifeng Qian , Bingkun Ning , Shuang Wang , Yongnan Chen , Yong Zhang , Nan Wang , Yanchao Li , Wen Zhang , Guangrui Gao

This study investigated the high-temperature crack resistance properties of yttria-stabilized zirconia (YSZ) coatings prepared in electrolytes with varying amounts of Y³⁺ addition, within a temperature range from 800 °C to 1000 °C. The flexibility-enhanced YSZ coating enabled by obtaining tetragonal zirconia (t-ZrO₂) and cubic zirconia (c-ZrO₂) coherent interfaces with high stress transfer efficiency, which is achieved by adjusting the phase composition in ZrO₂ coatings. The high-quality toughened YSZ coating with 59 % lower crack density compared with traditional ZrO₂ coating. This phenomenon is attributed to the c-ZrO₂/t-ZrO₂ coherent interface alleviates interfacial deformation at high temperatures and maintains a good stress transfer capability through its stable structure, which helps to disperse the thermal stress within the coating and inhibits crack propagation. This work provides a straightforward strategy for tailoring ZrO₂ coatings crack propagation resistance property at high temperatures by interface enhancement.

本研究探讨了在不同Y3+添加量的电解质中制备的钇稳定氧化锆（YSZ）涂层在800 ℃至1000 ℃温度范围内的高温抗裂性能。通过调整 ZrO2 涂层中的相组成，获得了具有高应力传递效率的四方氧化锆（t-ZrO2）和立方氧化锆（c-ZrO2）相干界面，从而实现了柔韧性增强的 YSZ 涂层。与传统的 ZrO2 涂层相比，高质量增韧 YSZ 涂层的裂纹密度降低了 59%。这一现象归因于 c-ZrO2/t-ZrO2 相干界面可减轻高温下的界面变形，并通过其稳定的结构保持良好的应力传递能力，这有助于分散涂层内的热应力并抑制裂纹扩展。这项工作为通过界面增强来定制 ZrO2 涂层在高温下的抗裂纹扩展性能提供了一种直接的策略。

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引用次数: 0