Materials Research Bulletin最新文献_第5页

Bifunctional PAni@Bi/Ce metal organic framework-Chitosan composite for electrochemical sensing and energy storage applications 用于电化学传感和储能应用的双功能 PAni@Bi/Ce 金属有机框架-壳聚糖复合材料

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2024-10-15 DOI: 10.1016/j.materresbull.2024.113136

Sayfa Bano , Waris , Adil Shafi Ganie , Saima Sultana , Mohammad Zain Khan , Suhail Sabir

Tailoring pristine metal-organic frameworks (MOFs) offered a great opportunity in exploring electrochemical sensing and energy storage applications. This study presents a novel Polyaniline@Bi/Ce MOF-Chitosan composite synthesized via a solvothermal method and chemical oxidative polymerization. PXRD, FTIR, SEM, EDAX, and TEM characterization confirmed its structural and morphological properties. Electrochemical performance was evaluated using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and electrochemical surface area (ECSA) analysis. The composite exhibited excellent electrocatalytic activity for detecting azithromycin and toluene with low detection limits and broad concentration ranges, demonstrated by voltammetry and amperometry. It showed significant stability for long term applications. Additionally, the material's energy storage capabilities were assessed through CV and galvanostatic charge-discharge (GCD) studies, revealing a specific capacitance of 415.32 F/g at 1.0 A g^-1 and 90.48 % capacity retention after 5000 cycles at 6 A g^-1. These findings highlight the Polyaniline@Bi/Ce MOF-Chitosan composite as a promising candidate for electrochemical sensing and energy storage applications.

定制原始金属有机框架（MOFs）为探索电化学传感和储能应用提供了巨大的机遇。本研究介绍了一种新型聚苯胺@Bi/Ce MOF-壳聚糖复合材料，它是通过溶热法和化学氧化聚合法合成的。PXRD、FTIR、SEM、EDAX 和 TEM 表征证实了其结构和形态特性。使用循环伏安法（CV）、电化学阻抗光谱法（EIS）和电化学表面积分析法（ECSA）对其电化学性能进行了评估。伏安法和安培法显示，该复合材料在检测阿奇霉素和甲苯方面具有出色的电催化活性，检测限低，浓度范围广。它在长期应用中表现出明显的稳定性。此外，还通过 CV 和电静态充放电 (GCD) 研究评估了该材料的储能能力，结果显示，在 1.0 A g-1 的条件下，比电容为 415.32 F/g，在 6 A g-1 的条件下循环 5000 次后，电容保持率为 90.48%。这些研究结果表明，聚苯胺@铋/铈 MOF-壳聚糖复合材料是电化学传感和能量存储应用的理想候选材料。

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引用次数: 0

Structural designs and synthesis of co-polycarbonates with cyclohexyl and fluorene structures: Low-dielectric constant, high solubility, and superior mechanical properties 具有环己基和芴结构的共聚碳酸酯的结构设计和合成：低介电常数、高溶解性和优异的机械性能

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2024-10-15 DOI: 10.1016/j.materresbull.2024.113144

Yiming Han , Sheng Zou , Teng Sun , Yuansheng Bai , Changjiang Kang , Qingyin Wang , Gongying Wang

The rapid developments of high-speed communication and large-scale integrated circuits have accelerated the research for insulating dielectric materials with low dielectric constant, low dielectric loss, and good mechanical properties. In this study, a series of polycarbonate resins containing cyclohexyl and fluorene structures are synthesized by melt transesterification, which is low dielectric, highly thermally resistant, and soluble. The effects of fluorene structure contents on the properties of a co-polycarbonate resin were studied systematically. The results showed that the non-polar fluorene group could reduce the molecular polarization of co-polycarbonate, resulting in low permittivity of co-polycarbonate are 2.41–2.71@1 MHz. In addition, the resin has excellent solubility and can be dissolved in NMP, CH₂Cl₂, THF, and other solvents at room temperature. Furthermore, the co-polycarbonate resins also exhibit superior heat resistance with glass transition temperature (Tg) of 160.6–173.1 °C as well as admirable mechanical properties with a tensile strength of 50.54–70.72 MPa. This makes it a promising candidate for high-speed communications and large-scale integrated circuits.

高速通信和大规模集成电路的快速发展加速了对低介电常数、低介电损耗和良好机械性能的绝缘介电材料的研究。本研究通过熔融酯交换反应合成了一系列含有环己基和芴结构的聚碳酸酯树脂，具有低介电常数、高耐热性和可溶性等特点。系统研究了芴结构含量对共聚碳酸酯树脂性能的影响。结果表明，非极性芴基团可降低共聚碳酸酯的分子极化，从而使共聚碳酸酯的介电常数较低，为 2.41-2.71@1 MHz。此外，该树脂还具有良好的溶解性，可在室温下溶解于 NMP、CH2Cl2、THF 等溶剂中。此外，共聚碳酸酯树脂还具有优异的耐热性（玻璃化转变温度（Tg）为 160.6-173.1 °C）和机械性能（拉伸强度为 50.54-70.72 兆帕）。这使其成为高速通信和大规模集成电路的理想候选材料。

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引用次数: 0

Novel red mud-based FeS2 composite used as an effective heterogeneous catalyst for the degradation of levofloxacin: Preparation, application and degradation mechanism 新型红泥基 FeS2 复合材料用作降解左氧氟沙星的有效异相催化剂：制备、应用和降解机理

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2024-10-15 DOI: 10.1016/j.materresbull.2024.113143

Junchi Gu , Linye Zhang , Yuhang Ji , Ruihua Xue , Guangxiang Duan , Guangtao Wei , Baiying Li

Red mud (RM), as industrial waste, was considered as the base material in this study. A heterogeneous catalyst of RM based-FeS₂ (RM-FeS₂) was prepared using a simple one-step calcination method. RM-FeS₂, as an effective activator of peroxymonosulfate (PMS), was utilized in the levofloxacin (LVF) degradation progress. The effect of the preparation conditions on crystal structure and catalytic activity of RM-FeS₂ was investigated. The systematic characterizations indicated that the surface area, electrical conductivity and the number of Fe(II) sites of RM were improved after compounding with FeS₂. According to the investigation of catalytic performance of RM-FeS₂, approximately 87 % of LVF (10 mg/L) was degraded in 60 min with the reaction conditions: [RM-FeS₂] = 0.2 g/L, [PMS] = 1 mmol/L and initial pH of 6.2. The RM-FeS₂ possessed excellent stability and reusability. ·OH, SO₄^•−, ¹O₂ and Fe(Ⅳ) were the dominant active species in RM-FeS₂/PMS system. Several possible degradation pathways of LVF were proposed. The toxicity of the treated LVF solution was effectively reduced in the RM-FeS₂/PMS system. In a word, this study not only realized the resource utilization of RM, but also presented a novel perspective for the effective degradation of organic pollutants in wastewater.

本研究以工业废弃物赤泥（RM）为基础材料。采用简单的一步煅烧法制备了一种基于赤泥-FeS2（RM-FeS2）的异相催化剂。RM-FeS2 作为过一硫酸盐（PMS）的有效活化剂，被用于左氧氟沙星（LVF）的降解过程。研究了制备条件对 RM-FeS2 晶体结构和催化活性的影响。系统表征表明，与 FeS2 复合后，RM 的比表面积、电导率和 Fe(II) 位点的数量都得到了提高。根据对 RM-FeS2 催化性能的研究，在反应条件为 [RM-FeS2] = [RM-FeS2] 时，60 分钟内可降解约 87% 的 LVF（10 mg/L）：[RM-FeS2] = 0.2 g/L，[PMS] = 1 mmol/L，初始 pH 为 6.2。RM-FeS2 具有优异的稳定性和可重复使用性。-OH、SO4--、1O2 和 Fe(Ⅳ) 是 RM-FeS2/PMS 体系中的主要活性物种。提出了几种可能的 LVF 降解途径。在 RM-FeS2/PMS 系统中，经处理的 LVF 溶液的毒性被有效降低。总之，该研究不仅实现了 RM 的资源化利用，而且为有效降解废水中的有机污染物提供了一个新的视角。

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引用次数: 0

Modeling and design for metal hydride-based hydrogen storage systems in underwater PEMFC applications 水下 PEMFC 应用中基于金属氢化物的储氢系统的建模和设计

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2024-10-13 DOI: 10.1016/j.materresbull.2024.113139

Berna Sezgin , Tayfur Ozturk , Inci Eroglu

Utilizing metal hydride materials presents a promising avenue for establishing a highly concentrated hydrogen medium suitable for onboard vehicle applications, including underwater contexts. This paper introduces a design solution devised to estimate the characteristics of a metal hydride-based hydrogen storage system tailored for underwater vehicle deployment. The solution facilitates sensitivity analysis across various parameters by offering system mass and volume estimations. The findings highlight the significance of thermodynamic properties and operational conditions in determining the suitability of metal hydrides for compact and efficient hydrogen storage. The study underscores the importance of refueling time, L/D ratio, cooling fluid temperature and velocity, and hydrogen storage capacity in influencing system mass, volume, and thermal management. The model provides insights into the design and optimization of metal hydride-based hydrogen storage systems, offering a comprehensive approach to enhancing performance and reliability for underwater applications.

利用金属氢化物材料为建立适合车载应用（包括水下应用）的高浓度氢介质提供了一条大有可为的途径。本文介绍了一种设计方案，用于估算为水下车辆部署量身定制的金属氢化物储氢系统的特性。通过提供系统质量和体积估算，该解决方案有助于对各种参数进行敏感性分析。研究结果强调了热力学特性和操作条件在确定金属氢化物是否适合用于紧凑高效储氢方面的重要性。研究强调了加氢时间、长径比、冷却液温度和速度以及储氢容量在影响系统质量、体积和热管理方面的重要性。该模型为基于金属氢化物的储氢系统的设计和优化提供了见解，为提高水下应用的性能和可靠性提供了一种全面的方法。

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引用次数: 0

Electrochemical behavior of tantalum ions in molten salt electrolysis for nano-powder preparation 用于制备纳米粉体的熔盐电解中钽离子的电化学行为

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2024-10-13 DOI: 10.1016/j.materresbull.2024.113142

Teng Liu , Liwen Zhang , Xiaoli Xi , Zuoren Nie

This research focused on analyzing the electrochemical properties of tantalum ions in NaCl-KCl molten salt during the extraction of tantalum and the synthesis of tantalum nano-powder. Tantalum ions were dissolved from the anode. Linear sweep voltammetry, cyclic voltammetry, square wave voltammetry, and chronoamperometry were employed to delve into the reduction and diffusion processes of tantalum ions. The study determined the diffusion coefficient, the nucleation process, and the deposition potential for tantalum ions. The findings revealed that the electrode reduction process of tantalum ions involved a three-step reaction: Ta⁵⁺→Ta³⁺→Ta⁺→Ta. This reaction was shown to be reversible and diffusion-controlled. The nucleation mode of tantalum ions was identified as instantaneous nucleation followed by progressive nucleation as the potential increased by chronoamperometry analysis. The cathodic deposition product was characterized using XRD, SEM, EDS, and TEM techniques, confirming the nanoscale granular nature and microstructure of the deposition products.

本研究的重点是分析钽离子在 NaCl-KCl 熔盐中提取钽和合成钽纳米粉体过程中的电化学特性。钽离子从阳极溶出。研究采用了线性扫描伏安法、循环伏安法、方波伏安法和计时变阻法来深入研究钽离子的还原和扩散过程。研究确定了钽离子的扩散系数、成核过程和沉积电位。研究结果表明，钽离子的电极还原过程涉及三步反应：Ta5+→Ta3+→Ta+→Ta。结果表明，这一反应是可逆的，并且是扩散控制的。通过计时器分析，确定了钽离子的成核模式为瞬时成核，然后随着电位的增加而逐渐成核。利用 XRD、SEM、EDS 和 TEM 技术对阴极沉积产物进行了表征，证实了沉积产物的纳米级颗粒性质和微观结构。

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引用次数: 0

Enhancement in the performance of a vanadium-manganese redox flow battery using electrospun carbon metal-based electrode catalysts 使用电纺碳金属基电极催化剂提高钒锰氧化还原液流电池的性能

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2024-10-11 DOI: 10.1016/j.materresbull.2024.113140

Barun Kumar Chakrabarti , Mengzheng Ouyang , Baidaa Alkhateab , J. Rubio-Garcia , Koray Bahadır Dönmez , Zehra Çobandede , Reza Afshar Ghotli , Serap Hayat Soytaş , Mustafa Kemal Bayazıt , Yashar S. Hajimolana , Pejman Kazempoor , Metin Gençten , Chee Tong John Low , Nigel P. Brandon

This study investigates the performance of both a vanadium/manganese redox flow battery (V/Mn RFB) and an all-vanadium redox flow battery (VRFB), employing carbon metal fabrics (CMFs) prepared through electrospinning followed by carbonization. Noteworthy advancements are observed in both systems upon coupling CMFs with thermally treated graphite felt (GF) electrodes. Nearly doubled peak power density and 50 % higher capacity utilization over 150 charge/discharge cycles at 75 mA cm⁻² are achieved for the V/Mn RFB with the incorporation of CMFs alongside graphite felt as catalysts. The VRFB demonstrates notable enhancements too, achieving approximately 200 cycles at a current density of 80 mA cm⁻², with high efficiencies (85 %) and electrolyte utilization (79 %) when CMFs are used in combination with graphite felts. These advancements may facilitate pilot-scale testing and integration of the V/Mn RFB for the employment in the renewable energy storage sector and grid-balancing studies.

本研究调查了钒/锰氧化还原液流电池（V/Mn RFB）和全钒氧化还原液流电池（VRFB）的性能，这两种电池都采用了先电纺再碳化的碳金属织物（CMF）。在将 CMF 与热处理石墨毡（GF）电极耦合后，两种系统都取得了显著进步。将 CMF 与石墨毡一起作为催化剂，V/Mn RFB 的峰值功率密度几乎翻了一番，在 75 mA cm-2 的条件下进行 150 次充电/放电循环后，容量利用率提高了 50%。VRFB 的性能也有显著提高，在电流密度为 80 mA cm-2 时可实现约 200 个循环，在 CMF 与石墨毡结合使用时，效率高（85%），电解液利用率高（79%）。这些进步可能会促进 V/Mn RFB 的试点规模测试和集成，以用于可再生能源存储领域和电网平衡研究。

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引用次数: 0

Co-addition of insulator-conductor (Dy2O3-Ag) nanoparticles as efficient pinning centers for YBa2Cu3O7-d superconducting ceramic 作为 YBa2Cu3O7-d 超导陶瓷高效引脚中心的绝缘体-导体（Dy2O3-Ag）纳米粒子的共添加物

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2024-10-10 DOI: 10.1016/j.materresbull.2024.113134

Ghadeer M. Alharbi , Yassine Slimani , Munirah A. Almessiere , Faten Ben Azzouz

The single inclusion of nanoparticles (NPs) into high-temperature superconductor materials was widely reported and proved its ability to enhance the pinning properties. The current research work aims to evaluate the influence of the combined addition effect of conductor (Ag) and insulator (

D y_{2} O_{3}

) NPs on the structure, morphology, critical current densities, and flux pinning properties of Ya₂Cu₃O_7-d (Y123) superconducting ceramics. We established that adding this route has a positive effect on the superconducting and pinning properties of the material. Specifically, it is observed that the co-addition of Dy₂O₃-Ag-NPs substantially enhances the critical current density by >330 % for in-field up to 3 Tesla and by 450 % for in-field up to 5 Tesla as compared to the pristine Y123 sample. Moreover, the energy of the centers that pin the vortex was strengthened and the critical current density at grain boundaries has also risen by more than ten times.

在高温超导体材料中单一加入纳米粒子（NPs）的研究已被广泛报道，并证明了其增强引脚特性的能力。目前的研究工作旨在评估导体（Ag）和绝缘体（Dy2O3）纳米粒子的联合添加效应对 Ya2Cu3O7-d （Y123）超导陶瓷的结构、形态、临界电流密度和磁通引脚特性的影响。我们发现，添加这一途径对材料的超导和引脚特性有积极影响。具体来说，与原始的 Y123 样品相比，Dy2O3-Ag-NPs 的共同添加大大提高了临界电流密度，在高达 3 特斯拉的磁场中提高了 330%，在高达 5 特斯拉的磁场中提高了 450%。此外，漩涡中心的能量得到加强，晶界处的临界电流密度也提高了十倍以上。

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引用次数: 0

Carbon dots-mediated plant adaptive responses to abiotic stress 碳点介导的植物对非生物胁迫的适应性反应

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2024-10-09 DOI: 10.1016/j.materresbull.2024.113137

Fengqiong Chen , Ziyu Shen , Ruokai Shi , Xuejie Zhang , Haoran Zhang , Wei Li , Bingfu Lei

Global agricultural productivity and food security are facing severe challenges from abiotic stresses, necessitating sustainable agricultural innovations to address this issue. Nanotechnology, as a pioneering approach, holds great promise for improving crop yields, with carbon dots (CDs) emerging as a particularly attractive solution due to their ease of synthesis, excellent biocompatibility, and low toxicity. This review summarizes the synthetic strategies of CDs, their structural characteristics, potential properties, and toxicity evaluation, as well as their capacity to enhance crop productivity by improving photosynthesis, nutrient uptake efficiency, and antioxidant defense systems. Additionally, we discuss the application of CDs in alleviating abiotic stresses that affect plants, such as drought, salinity, heavy metal toxicity, and extreme temperatures. We also discuss the physiological, biochemical, and molecular mechanisms through which CDs enhance plant tolerance to these stresses. The versatility and effectiveness of CDs in sustainable agriculture position them as promising candidates for future agricultural practices aimed at mitigating the impacts of abiotic stress.

全球农业生产率和粮食安全正面临着非生物胁迫的严峻挑战，需要可持续的农业创新来解决这一问题。纳米技术作为一种开创性的方法，在提高作物产量方面大有可为，其中碳点（CD）因其易于合成、生物相容性好和毒性低，成为一种特别有吸引力的解决方案。本综述概述了碳点的合成策略、结构特征、潜在特性和毒性评估，以及它们通过改善光合作用、养分吸收效率和抗氧化防御系统来提高作物产量的能力。此外，我们还讨论了 CD 在缓解干旱、盐碱、重金属毒性和极端温度等影响植物的非生物胁迫方面的应用。我们还讨论了 CD 增强植物对这些胁迫的耐受性的生理、生化和分子机制。CDs在可持续农业中的多功能性和有效性使其成为未来农业实践中旨在减轻非生物胁迫影响的有前途的候选物质。

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引用次数: 0

Enhancing glycerol dry reforming performance through metal promoters: A study on 10Ni/La.Al catalyst with Mo, Sn, and Cd additions 通过金属促进剂提高甘油干转化性能：添加钼、锡和镉的 10Ni/La.Al 催化剂研究

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2024-10-09 DOI: 10.1016/j.materresbull.2024.113135

Mohadeseh Golestani Kashani , Yalda Ramezani , Fereshteh Meshkani

The effect of metal promoters (Mo, Sn, and Cd) on the performance of the 10Ni/La.Al nanocrystalline catalyst in Glycerol Dry Reforming (GDR) was investigated. 2x.10Ni/La.Al (x = Mo, Sn, and Cd) catalysts were prepared using the solid-state method and 10 wt.% Ni and 2 wt.% Mo, Sn, and Cd were added to the catalyst using the impregnation method. The catalysts were characterized by BET, X-ray diffraction, temperature-programmed reduction (TPR), oxidation (TPO), Raman, and scanning electron microscopies (SEM) techniques. It was found that adding Mo caused an increase in glycerol conversion and improved the long-term stability of the 10Ni/La.Al. Furthermore, catalysts with different amounts of promoter loading (2, 4, and 6 wt%) were synthesized to evaluate the optimum amount of Mo. 4Mo.10Ni/La.Al was selected to achieve 58 % glycerol conversion and the best stability.

研究了金属促进剂（钼、锡和镉）对 10Ni/La.Al 纳米晶催化剂在甘油干转化（GDR）中性能的影响。采用固态法制备了 2x.10Ni/La.Al（x = Mo、Sn 和 Cd）催化剂，并采用浸渍法在催化剂中添加了 10 wt.% Ni 和 2 wt.% Mo、Sn 和 Cd。通过 BET、X 射线衍射、温度编程还原 (TPR)、氧化 (TPO)、拉曼和扫描电子显微镜 (SEM) 技术对催化剂进行了表征。研究发现，添加 Mo 可提高甘油转化率，并改善 10Ni/La.Al 的长期稳定性。此外，还合成了不同促进剂负载量（2、4 和 6 wt%）的催化剂，以评估 Mo 的最佳用量。结果表明，4Mo.10Ni/La.Al 的甘油转化率为 58%，稳定性最佳。

引用次数: 0

Ti3C2Tx MXene coated 3D ordered macroporous germanium anodes for Li-ion batteries with enhanced cycling stability and fast Li-ion mobility 用于锂离子电池的 Ti3C2Tx MXene 涂层三维有序大孔锗阳极，具有更高的循环稳定性和快速锂离子迁移率

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2024-10-09 DOI: 10.1016/j.materresbull.2024.113138

Zhaoliang Yu , Duo Wang , Ming Lu , Jiaming Li , Xiangdong Meng , Haibo Li

The current trend in electronic device development and electric vehicle technology has resulted in A growing need for negative electrode materials that possess high capacity and quick Li-ion transport properties. Ge-based materials are considered the very promising candidates owing to their high theoretical capacity and facile alloying reaction with Li. In order to enhance the rate of Li-ion diffusion and account for the volume change of over 300 %, a Ti₃C₂T_x MXene coated 3D ordered macroporous germanium (3DOM Ge@MXene) structure was successfully developed. The 3DOM Ge@MXene provides a 1490 mAh g⁻¹ initial reversible capacity at 0.32 A g⁻¹. Additionally, after 100 cycles, it displays a consistent cycling ability of 1034 mAh g⁻¹. The MXene coating also improves the material's Li-ion rapid transfer performance, with Li-ion diffusion coefficient of 1.35 × 10⁻¹⁰ cm² s⁻¹ for anodic and 2.2 × 10⁻¹⁰ cm² s⁻¹ for cathodic.

当前电子设备和电动汽车技术发展的趋势导致对具有高容量和快速锂离子传输特性的负极材料的需求与日俱增。锗基材料因其理论容量高且易于与锂发生合金反应而被认为是非常有前途的候选材料。为了提高锂离子的扩散速度并使体积变化超过 300%，我们成功开发了一种 Ti3C2Tx MXene 涂层三维有序大孔锗（3DOM Ge@MXene）结构。3DOM Ge@MXene 在 0.32 A g-1 的条件下可提供 1490 mAh g-1 的初始可逆容量。此外，经过 100 次循环后，它显示出 1034 mAh g-1 的稳定循环能力。MXene 涂层还提高了材料的锂离子快速转移性能，阳极锂离子扩散系数为 1.35 × 10-10 cm2 s-1，阴极锂离子扩散系数为 2.2 × 10-10 cm2 s-1。

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引用次数: 0