Journal of Alloys and Compounds最新文献

{"title":"Effect of optical bandgap variation induced by morphology difference on the luminescence properties of narrow-band green SrMgAl10O17:Mn2+ phosphors","authors":"Haoran Li, Yujun Liang, Jiaxin Zheng, Jiabin Hao, Shang Zhao, Xiaodong Liu, Xiaoxuan Li, Xin Guan, Xiaodeng Wu, Xiangfu Meng","doi":"10.1016/j.jallcom.2025.184485","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184485","url":null,"abstract":"Mn²⁺-activated narrow-band green phosphors are promising candidates for wide-gamut displays, yet their practical application in LED backlighting is often hindered by the intrinsic spin-forbidden nature of Mn²⁺ d-d transitions, which limits luminescence efficiency. In this work, we demonstrate that the morphology of SrMgAl₁₀O₁₇:Mn²⁺ (SMAO:Mn²⁺) phosphors plays a critical role in modulating their optical bandgap and luminescence properties. The phosphor exhibits strong blue-light-excited green emission peaking at 515<!-- --> <!-- -->nm with a narrow full width at half maximum (FWHM) of 25-29<!-- --> <!-- -->nm. By employing AlF₃ as a flux in synthesis, the resulting sample (AF-SMAO:Mn²⁺) shows well-crystallized, near-spherical hexagonal blocks, which contribute to a larger optical bandgap and reduced surface defects compared to the H₃BO₃-fluxed sample. High-resolution XPS spectra of O 1<!-- --> <!-- -->s analysis reveals AF-SMAO:Mn²⁺ possesses a higher lattice-to-defect oxygen ratio (5.14:1) versus the H₃BO₃-fluxed sample (3.96:1), confirming reduced surface defects. These characteristics suppress nonradiative recombination, leading to a higher photoluminescence quantum yield (internal/external quantum efficiencies = 86.56%/31.19%) and a shorter decay time. Furthermore, the phosphor displays excellent thermal stability, maintaining over 80% of its initial emission intensity at 423<!-- --> <!-- -->K after five thermal cycles, with the FWHM broadening only to 31<!-- --> <!-- -->nm. A prototype white LED fabricated with the green SMAO:Mn²⁺ and red K₂SiF₆:Mn²⁺ on a 450<!-- --> <!-- -->nm blue chip achieves a color gamut of 114% NTSC. These findings not only underscore the potential of SMAO:Mn²⁺ for advanced backlight displays but also provide a generalizable strategy for enhancing the performance of Mn²⁺-based phosphors through morphology and bandgap engineering.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"104 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145305920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Manipulating the metal-insulator transitions in correlated vanadium dioxide through bandwidth and band-filling control","authors":"Xiaohui Yao, Jiahui Ji, Xuanchi Zhou","doi":"10.1016/j.jallcom.2025.184458","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184458","url":null,"abstract":"The metal-insulator transition (MIT) in correlated oxide systems opens up a new paradigm to trigger the abruption in multiple physical functionalities, enabling the possibility in unlocking exotic quantum states beyond conventional phase diagram. Nevertheless, the critical challenge for practical device implementation lies in achieving the precise control over the MIT behavior of correlated system across a broad temperature range, ensuring the operational adaptability in diverse environments. Herein, correlated vanadium dioxide (VO₂) serves as a model system to demonstrate effective modulations on the MIT functionality through bandwidth and band-filling control. Leveraging the lattice mismatching between RuO₂ buffer layer and TiO₂ substrate, the <em>in-plane</em> tensile strain states in VO₂ films can be continuously adjusted by simply altering the thickness of buffer layer, leading to a tunable MIT property over a wide range exceeding 20 K. Beyond that, proton evolution is unveiled to drive the structural transformation of VO₂, with a pronounced strain dependence, which is accompanied by hydrogenation-triggered collective carrier delocalization through hydrogen-related band filling in <em>t</em>_2 g band. The present work establishes an enticing platform for tailoring the MIT properties in correlated electron systems, paving the way for the rational design in exotic electronic phases and physical phenomena.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"33 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145306004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Low-Voltage Enhancement-Mode p-Type SnO TFTs enabled by Surface Passivation and High-κ Dielectric Integration","authors":"Zugang Li, Yu Yang, Linhan Li, Chunfeng Wang, Xiaolin Nie, Shun Han, Peijiang Cao, Ming Fang, Wenjun Liu, Deliang Zhu","doi":"10.1016/j.jallcom.2025.184459","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184459","url":null,"abstract":"Tin monoxide (SnO), with its high theoretical hole mobility, holds great promise as a p-type semiconductor for complementary metal-oxide semiconductor (CMOS) thin-film transistors (TFTs). However, its low thermal stability and tendency to oxidize into n-type SnO₂ have hindered practical device fabrication. Additionally, most reported SnO-TFTs operate in depletion mode and utilize low-κ SiO₂ gate dielectrics, resulting in high static power consumption and operating voltages. In this work, we systematically investigate the electrical evolution of p-type SnO films and TFTs by tuning the oxygen partial pressure (Opp) and annealing temperature. We demonstrate that an optimal Opp of 5% combined with annealing at 250 °C effectively suppresses the transformation of p-type SnO into n-type SnO₂, while yielding high device performance with a saturation mobility of 3.06 cm²/Vs, an on/off current ratio of 7.15 × 10², a threshold voltage of 18.41<!-- --> <!-- -->V, and a subthreshold swing of 19.72<!-- --> <!-- -->V/dec. Moreover, passivating the SnO film with a thin SiO₂ layer increases the channel resistance due to the added resistive path and decreases the carrier concentration by partially screening the gate electric field. This electrostatic modulation converts the TFT operation from depletion mode to enhancement mode, reducing static power dissipation and shifting the threshold voltage to -0.17<!-- --> <!-- -->V. Finally, replacing the conventional 300<!-- --> <!-- -->nm SiO₂ gate dielectric with a solution-processed 30<!-- --> <!-- -->nm high-κ ZrO₂ layer significantly enhances the gate capacitance. This substitution reduces the operating voltages from <em>V</em>_GS = -50 V and <em>V</em>_DS = -50 V to <em>V</em>_GS = -5 V and <em>V</em>_DS = -5 V. These findings highlight the importance of synergistic control over the channel, dielectric, and interface engineering to achieve high-performance, low-power p-type SnO TFTs, opening new possibilities for advanced and energy-efficient electronic applications.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"3 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145305970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Luminescence properties and energy transfer behavior of novel KGd(WO4)2: Tb3 + , Eu3+ phosphors for ultraviolet-excited white light-emitting diodes","authors":"Weimin Jiang, Chuangyu Wang, Shengwei Guan, Zengming Qin, Hongwei Ding, Feng Wang","doi":"10.1016/j.jallcom.2025.184470","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184470","url":null,"abstract":"A series of KGd(WO₄)₂: Tb³⁺ phosphors and Tb³⁺, Eu³⁺ co-doped KGd(WO₄)₂ phosphors were synthesized by high-temperature solid-state method. The structure, luminescence properties and energy transfer mechanism of the synthesized phosphors were systematically investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), excitation spectra and emission spectra. Under 315 nm excitation, the optimal doping concentration of Tb³⁺ was 0.04 mol. Beyond this concentration, the luminescence intensity of Tb³⁺ gradually decreased due to the concentration quenching effect. In KGd(WO₄)₂: Tb³⁺ samples, the dominant energy transfer mechanism was determined to be the dipole-dipole interaction. In addition, energy transfer from Tb³ ⁺ to Eu³ ⁺ was observed in the Tb³ ⁺/Eu³ ⁺-doped KGd(WO₄)₂ emission spectra, which was further verified by the fluorescence lifetime measurements of Tb³ ⁺. Calculations based on the CIE chromaticity coordinates revealed that luminescence color of the phosphors gradually shifted from green to yellow-green with the increase of Eu³⁺ doping concentration, realizing effective tunability of the luminescence color. The temperature-dependent emission spectra also indicated that KGd(WO₄)₂: Tb³⁺, Eu³⁺ phosphors had excellent thermal stability. The as-packaged white LED device exhibited an outstanding color rendering index of 96.4. The results mentioned above show that all the synthesized phosphors have potential application value in near-ultraviolet excited white light-emitting diodes.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145306005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fe-based metallic glass ribbons as dual electrodes for ultrasonic cavitation-enhanced electro-Fenton degradation of ofloxacin","authors":"Yu Zhang, Zhenxuan Zhang, Kunheng Zou, Mengting Yang, Wenqing Ruan, Changyong Liu, Xiong Liang, Jiang Ma","doi":"10.1016/j.jallcom.2025.184422","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184422","url":null,"abstract":"Electrochemical degradation holds significant promise for wastewater treatment. This study introduces an ultrasonic cavitation-enhanced electrochemical degradation system that employs Fe-Si-B metallic glass ribbons as both cathodic and anodic materials for the degradation of ofloxacin (OFL) in wastewater. Under acidic conditions (pH = 3) with a 25<!-- --> <!-- -->mA applied current, the system achieves a good degradation efficiency (98.4%) for 25<!-- --> <!-- -->mg/L OFL within 30<!-- --> <!-- -->min. The OFL removal efficiency increases with rising current. Anodic oxidation induces the formation of cluster-like oxidized structures on the ribbon surface, which enhances the hydrophilicity of the electrodes. Ultrasonication further promotes the development of these clustered morphologies and improves the electrodes’ hydrophilicity. Moreover, ultrasonic assistance boosts degradation performance, particularly during the initial reaction stage by increasing the removal efficiency from 33.4% to 61.5% within the first 15<!-- --> <!-- -->min. It also enhances the mineralization efficiency 3-fold (from 12.1% to 36.3%) and raises the reaction rate constant by 1.52 times (from 0.02361<!-- --> <!-- -->min^-1 to 0.03587<!-- --> <!-- -->min^-1). Hydroxyl radicals and hydrogen radicals are identified as the dominant reactive species involved in the degradation mechanism. After 10 reuse cycles, the Fe-based amorphous ribbon maintained a degradation rate of nearly 90%, highlighting its remarkable stability. This work provides an efficient and robust strategy for antibiotic wastewater treatment and highlights the potential of amorphous materials for advanced oxidation processes.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145305966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fe-Doping Strategy Enhances Reversible Hydrogen Capacity and Cycle Stability of V-Ti-Cr Solid Solution Alloy","authors":"Shuling Chen, Wenbin Jiang, Mili Liu, Shaoyang Shen, Lin Jiang, Hui Wang, Liuzhang Ouyang","doi":"10.1016/j.jallcom.2025.184362","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184362","url":null,"abstract":"The vanadium-based solid solution alloy that features high volumetric hydrogen density is a competitive solution for hydrogen storage system. However, the strong V-H bonding fundamentally limits its reversible hydrogen storage capacity (C_<em>re</em>) and cycling performance. Herein, we design a series of Fe-doped BCC single-phase alloys, V₈₀Ti_6.67Cr_{13.3.3-<em>x</em>}Fe_<em>x</em> (x=0,1,2,3), to systematically investigate the Fe doping effect. DFT calculations reveal that in the alloys and hydrides phases, vanadium atoms donate electrons to iron through charge transfer, reducing both the electron density of states near hydrogen sites and the V-H bond strength. This electronic modulation leads to a measurable increase in V-H bond length from 1.76<!-- --> <!-- -->Å of V₈₀Ti_6.67Cr_13.33 hydride to 1.80<!-- --> <!-- -->Å of V₈₀Ti_6.67Cr_12.33Fe₁ hydride. PCT measurements demonstrate a non-monotonic trend in reversible capacity with Fe content, peaking at 2.34<!-- --> <!-- -->wt.% for the 1% Fe-doped alloy. Notably, under experimental conditions (273<!-- --> <!-- -->K absorption/343<!-- --> <!-- -->K desorption), V₈₀Ti_6.67Cr_12.33Fe₁ alloy achieves a C_<em>re</em> of 2.58<!-- --> <!-- -->wt.%. Moreover, the V₈₀Ti_6.67Cr_12.33Fe₁ alloy exhibits exceptional cycling stability with 93.6% capacity retention after 500 cycles at 298<!-- --> <!-- -->K, demonstrating the critical role of Fe in enhancing cycling performance. This achievement opens new insight into bonding structure engineering for developing advanced alloys with enhanced hydrogen storage capability.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"33 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145305968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microstructural regulation and specific strength optimization of lightweight porous eutectic high-entropy alloys by thermal treatment","authors":"Subo Yu, Borui Zhang, Kaiwen Kang, Saike Liu, Yiteng Jiang, Mingkun Xu, Yuheng Zhao, Gong Li","doi":"10.1016/j.jallcom.2025.184456","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184456","url":null,"abstract":"Porous metallic materials, offering a unique combination of lightweight characteristics and mechanical load-bearing capability, have demonstrated great potential in aerospace, energy conversion, and multifunctional structural applications. In this study, a triple-phase eutectic high-entropy alloy (EHEA) with the composition Co₁₈Cr₁₈Fe₁₈Ni₂₆Al₁₀Nb₁₀ was employed as the precursor for fabricating stable porous structures via a chemical dealloying process. Prior to dealloying, the as-cast alloy was subjected to annealing at 750 °C, 900 °C, and 1050 °C to induce microstructural evolution with varying phase scales and distributions, thereby influencing subsequent pore formation behavior. A comprehensive characterization was conducted to evaluate the effects of annealing on microstructure evolution, dealloying depth, ligament size, and room-temperature compressive performance. Among the tested conditions, the sample annealed at 900 °C exhibited an optimized combination of structural integrity and mechanical performance after dealloying, achieving a high specific strength of 177.25 kN·m/kg while maintaining a low density of 5.65<!-- --> <!-- -->g/cm³. This work establishes an effective strategy for tuning porous architecture and mechanical properties through thermal treatment, providing new insights and experimental evidence for the development of high-performance porous high-entropy alloys.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"104 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145306001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the Enhancement of Al5Ti1B Refining Capacity by Rare Earth La and its effect on the Mechanical Properties of A6111 Aluminum Alloy","authors":"Zhengshang Qin, Qin Feng, Youbin Wang, Hui You, Xinpeng Wang, Chenglei Wang","doi":"10.1016/j.jallcom.2025.184479","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184479","url":null,"abstract":"In this study, a novel Al5Ti1B-<em>x</em>La (<em>x</em>=1, 3, 5) refiner was prepared via the fluoride salt aluminum-thermal method (Al, KBF₄, K₂TiF₆) to investigate the effects of varying La concentrations on the refining phases Al₃Ti, TiB₂, and Ti₂Al₂₀La as well as on anti-fading capability, and to evaluate the influence of the refiner on the microstructure and properties of A6111 aluminum alloy. The results indicate that Al5Ti1B-1La exhibited the best refining performance and anti-fading capability. La suppressed the growth of Al₃Ti, and the core–shell structure formed by Ti₂Al₂₀La and Al₃Ti resulted in a more uniform distribution and denser microstructure of the secondary phases in Al5Ti1B-1La compared with commercial Al5Ti1B. TEM observations revealed that La was adsorbed on the TiB₂(0001) surface, forming Al–La two-dimensional compounds (2DC), which prevented the growth and agglomeration of TiB₂ particles. The addition of 1.0<!-- --> <!-- -->wt% Al5Ti1B-1La successfully reduced the grain size of as-cast A6111 to 40.47±14.81μm, representing reductions of 80.7% and 47.8% compared with the unrefined alloy and commercial 1.0<!-- --> <!-- -->wt% Al5Ti1B, respectively. After T6 heat treatment, the tensile strength, elongation, and hardness reached 320.2<!-- --> <!-- -->MPa, 9.3%, and 98.6HV, respectively, corresponding to increases of 104.8%, 113.3%, and 32.7% over the unrefined alloy and 83.2%, 55.4%, and 18.1% over commercial 1.0<!-- --> <!-- -->wt% Al5Ti1B. The fracture morphology transformed into ductile dimples. The introduction of La facilitated the transformation of β-Fe into α-Fe and converted the needle-like eutectic Si into short rod-like structures, thereby enhancing the mechanical properties of the aluminum alloy.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"12 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145306002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tunable color emission is achieved in Lu3Al5O12: Tb3+, Eu3+ phosphors for multimode anti-counterfeiting","authors":"Liangchun Wei, Xiuling Liu, He Tang, Xiaoyun Mi, Quansheng Liu","doi":"10.1016/j.jallcom.2025.184452","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184452","url":null,"abstract":"This study successfully synthesized a new type of color-adjustable Lu₃Al₅O₁₂: Tb³⁺, Eu³⁺ (LuAG) phosphor through the solid-state reaction approach. A comprehensive characterization of this phosphor was conducted, covering aspects such as its crystal structure, luminescence spectra, decay lifetimes, thermal stability, and the mechanism of energy transfer. Tb³⁺ and Eu³⁺ emit distinct green and red luminescence respectively, with the green emission peaking at 543<!-- --> <!-- -->nm (corresponding to the ⁵D₄→⁷F₅ transition) and the red emission at 591<!-- --> <!-- -->nm (attributed to the ⁵D₀→⁷F₁ transition). As the doping concentration of Eu³⁺ rises, the emission color shifts from green to yellow, which is due to the energy transfer from Tb³⁺ to Eu³⁺. Using Dexter’s theory of energy transfer in conjunction with Reisfeld’s approximation, it was determined that the dominant mechanism for energy migration involves electric quadrupole-quadrupole interactions. When the temperature of the phosphor varies from 303<!-- --> <!-- -->K to 533<!-- --> <!-- -->K, it shows an excellent abnormal thermal quenching property. In addition, based on the thermal sensitivity of fluorescence intensity ratio, the non-thermal coupled levels of Tb³⁺ and Eu³⁺ are used for optical temperature measurements. Therefore, this phosphor can be used as a multi-mode dynamic anti-counterfeiting material, providing complex anti-counterfeiting performance and making the anti-counterfeiting strategy more secure.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"93 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145305949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of Bilayer High-Strength Nanoporous Copper Current Collector via Electrodeposition-Dealloying","authors":"Feixiang Guo, Bin Yang, Weiwei Lu, Xiaowen Peng, Qianqian Zhu, Haitao Liu, Kexing Song","doi":"10.1016/j.jallcom.2025.184309","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.184309","url":null,"abstract":"High-performance lithium-metal batteries are prone to lithium dendrite growth and volume expansion in commercial applications, leading to a significant decrease in the cycling stability of the battery system and safety hazards. The construction of a three-dimensional porous current collector can effectively suppress lithium dendrite growth and improve the electrochemical performance of batteries. Therefore, in this study, we designed a simple and efficient electrodeposition-chemical dealloying process. Initially, a highly dense and uniform copper-zinc alloy coating was successfully prepared on the substrate copper foil through a two-step electrodeposition process. The effects of the substrate copper foil condition and electrodeposition parameters on the microstructure and properties of the alloy coating were systematically investigated. Subsequently, the copper-zinc alloy foil was subjected to chemical dealloying treatment, resulting in a high-porosity, high-performance porous copper current collector with a thickness of 12<!-- --> <!-- -->µm, a porosity of 36.9% and a mechanical strength of 362<!-- --> <!-- -->MPa. Electrochemical tests on the prepared porous copper current collector showed that the Coulombic efficiency of the half-cell remained 98.05% after 240 cycles; the capacity of Li@3DCu@5<!-- --> <!-- -->min//LFP reached 124 mAh·g^-1 after 300 cycles, with a capacity retention rate of 84.9%, and the de-alloyed porous copper current collector demonstrated more excellent Coulombic efficiency and cycle stability.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"19 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145305969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}