Journal of Alloys and Compounds最新文献

{"title":"Negative Thermal Expansion in Ti2O3-SiC Composites Induced by Microstructural Effect","authors":"Naike Shi, Xuyang Yan, Longlong Fan, Meng Xu, Yiming Yang, Mengzhe Hou, Takumi Nishikubo, Masaki Azuma, Jun Chen","doi":"10.1016/j.jallcom.2025.180077","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180077","url":null,"abstract":"Regulating and reducing the thermal expansion of materials has long been a challenge. In this study, a composite with negative thermal expansion (NTE) has been obtained by combining two intrinsically positive thermal expansion (PTE) materials—Ti₂O₃ and SiC via microstructural effect. We have realized the successful retention and amplification of the microstructural effect of Ti₂O₃ within the composite. The synchrotron X-ray computed tomography and mercury injection porosimeter reveals that the composite exhibits a unique pore distribution and enhanced porosity, enabling NTE properties that exceed theoretical predictions. This work provides a novel approach to transforming the intrinsic thermal expansion behavior of materials via microstructural effect, paving the way for innovative applications of NTE materials in precision engineering.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"30 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734017","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":"Coherent Interface Design in Sintered GeO₂@Sn-MOF for High-Performance Lithium-Ion Anodes","authors":"Jianfang Chen, Junwu Ma, Yinhua Ma, Jiajin Luo, Gao Cheng, Wei Ran, Zhengyan Liu, Guangrui Wang, Tang Tang, Zan Tang, Meng Xu, Lei Shen, Qiang Wang","doi":"10.1016/j.jallcom.2025.180054","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180054","url":null,"abstract":"Tin-based metal-organic frameworks (Sn-MOFs) are promising anode materials but suffer from structural instability and unstable solid-electrolyte interphase (SEI), leading to capacity fading and poor cycling performance. We employ coherent interface engineering to address these issues to develop sintered GeO₂@Sn-MOF with coherent grain boundaries, enhancing structural stability, lithium-ion transport, and cycling durability. X-ray diffraction (XRD) and transmission electron microscopy (TEM) confirm the formation of stable SnO₂/GeO₂ interfaces, mitigating volume expansion and improving mechanical integrity. Electrochemical tests show that the optimized Sn-3Ge composition achieves a high initial capacity of 1968 mAh g⁻¹ at 0.1<!-- --> <!-- -->C, excellent rate capability of 480 mAh g⁻¹ at 5<!-- --> <!-- -->C, and superior cycling stability, retaining 77% capacity after 500 cycles at 1<!-- --> <!-- -->A<!-- --> <!-- -->g⁻¹. These findings highlight the role of coherent interfaces in enhancing lithium-ion diffusion and SEI stability, offering a promising strategy for high-performance lithium-ion battery anodes.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"18 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734182","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":"Structural, electrical and magnetic characterization of nanoparticles of the Pr1-xSrxCoO3 (0.1≤ x ≤ 0.5) system synthesized by a chemical route","authors":"C.J. Aguilar, J.E. Diosa, E. Mosquera, J.E Rodríguez-Páez, D.G. Lamas","doi":"10.1016/j.jallcom.2025.180049","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180049","url":null,"abstract":"Ceramic powders of the strontium-doped praseodymium cobaltite system, Pr_1-xSr_xCoO₃ - PSCO, were synthesized in concentrations (0.1≤ x ≤ 0.5), using the Pechini polymeric precursor method. The synthesized powders, heat treated at 1000 °C, had a single crystalline phase with an orthorhombic perovskite type <em>Pnma</em> structure and a primary particle size &lt;100<!-- --> <!-- -->nm, a characteristic determined using SEM and TEM techniques. The results of Raman spectroscopy allowed us to determine the distortions in the lattice vibrations caused by the ions that replace the A sites (Pr for Sr). The PSCO samples with concentrations between x = 0.2 and x = 0.5, had energy gap values of ∼3.3<!-- --> <!-- -->eV, while for the concentration x = 0.1 a value close to 4<!-- --> <!-- -->eV was obtained. In addition, the indirect gap calculations, carried out for all samples, showed a value close to 2.5<!-- --> <!-- -->eV. These results suggest that the substitution of the corresponding transition metal ion allowed the modification of the gap energy, obtaining wide-gap semiconductors. The magnetic characterization showed that T_c - the temperature of transition from the PM to the FM state - increased for the concentration of x = 0.4 of strontium, being very close to room temperature (T_c = 290<!-- --> <!-- -->K). In addition, a second anomalous magnetic transition was observed at T_A = 115<!-- --> <!-- -->K for the PSCO (x = 0.5) sample, behavior that has also been reported by other researchers.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"15 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734190","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":"Electrochemical performance of Ag nanoparticles-integrated surface-terminated V2CTx MXene for enhanced energy storage","authors":"Alishbah Zaka, Muhammad Adil Mansoor, Abdul Karim, Sajjad Haider, Kamran Alam, Mudassir Iqbal","doi":"10.1016/j.jallcom.2025.180025","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180025","url":null,"abstract":"The incorporation of metal nanoparticles into two-dimensional (2D) MXene has emerged as a promising strategy for enhancing energy storage capabilities, offering a potential solution to the global energy crisis. MXene are considered highly effective electrode materials for electrochemical energy storage devices due to its exceptional electrical conductivity, unique layered structure, and diverse surface functional groups. However, the strong van der Waals interactions between MXene layers often result in stacking and agglomeration, leading to a reduction in active sites and diminished electrochemical performance. This study investigates the incorporation of silver nanoparticles (AgNPs) into surface-terminated vanadium carbide MXene (V₂CT_x) using a facile sonication method, which preserves the integrity of the MXene layers. The conductive AgNPs not only act as spacers to prevent layer stacking but also enhance the electrical conductivity of V₂CT_x. X-ray diffraction spectroscopy (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) are employed to support the successful synthesis of nanocomposite. Furthermore, the nanocomposite was electrochemically evaluated as an electrode material for electrochemical energy devices. The resulting V₂CT_x-Ag nanocomposites exhibit a specific capacitance of 1122<!-- --> <!-- -->F/g with excellent specific capacitance retention of 105% after 10,000 cycles. Moreover, the MXene-Ag nanocomposite also showed energy and power densities of 21.67<!-- --> <!-- -->Wh/kg and 1000<!-- --> <!-- -->W/kg, respectively in a two-electrode setup.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"22 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734178","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":"Improved low-stress thermoplastic forming of TiAl alloys via dislocation behavior under mechanical vibration","authors":"Minghan Sun, Xiong Nie, Zhenwei Chen, Lunsu Liang, Lu Guo, Mingjie Wang, Chao Zhao, Lingxiao Li","doi":"10.1016/j.jallcom.2025.180030","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180030","url":null,"abstract":"Despite their lightweight and high-temperature advantages, TiAl alloys have limited thermoplastic forming capacity, which considerably restricts their use in complex structural components for aerospace applications. To improve their thermoplastic forming ability while preserving performance, this study introduced a mechanical vibration-assisted forming technology and independently developed a mechanical vibration tensile test platform. In a vibration-assisted tensile test (VT), a low-frequency vibration of 1.5<!-- --> <!-- -->Hz was applied, resulting in a peak stress of 194<!-- --> <!-- -->MPa for the specimen, which was nearly 21% lower than the 242<!-- --> <!-- -->MPa in the non-vibration-assisted tensile tests (NT). This study demonstrates, for the first time, that mechanical vibration–assisted forming technology can considerably reduce molding stress in TiAl alloys. Subsequent characterization results showed that vibration improved the long-range slip capacity of dislocations and promoted their rearrangement and annihilation, resulting in a substantially improved dynamic recrystallization (DRX) capacity. Furthermore，active dislocation movement and dissociation in the α₂ and γ phases provided nucleation sites for the formation of metastable phase Ti₂Al and promoted twinning, this was accompanied by considerable dislocation consumption. Vibration also promoted the uniform deformation of the α₂ and γ phases and reduced the strain gradients at the phase interfaces, thereby weakening back-stress strengthening to reduce deformation resistance. These findings provide an effective pathway for overcoming the intrinsic brittleness of TiAl alloys and are expected to extend to other hard-to-deform metals, offering transformative potential in precision forming technologies.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"58 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734179","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":"Effect of tantalum addition on precipitate coarsening kinetics and mechanical properties of the γ′-strengthened chemically complex alloys","authors":"Haoyang Yu, Wei Fang, Tiexu Peng, Chang Liu, Xin Zhang, Jia Li, Fuxing Yin","doi":"10.1016/j.jallcom.2025.180062","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180062","url":null,"abstract":"The application of &lt;span&gt;&lt;span style=\"\"&gt;&lt;/span&gt;&lt;span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msup is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;&amp;#x3B3;&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mo is=\"true\"&gt;&amp;#x2032;&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"&gt;&lt;svg aria-hidden=\"true\" focusable=\"false\" height=\"2.663ex\" role=\"img\" style=\"vertical-align: -0.697ex;\" viewbox=\"0 -846.5 845.9 1146.6\" width=\"1.965ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"&gt;&lt;g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"&gt;&lt;g is=\"true\"&gt;&lt;g is=\"true\"&gt;&lt;g is=\"true\"&gt;&lt;use xlink:href=\"#MJMATHI-3B3\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(551,362)\"&gt;&lt;g is=\"true\"&gt;&lt;use transform=\"scale(0.707)\" xlink:href=\"#MJMAIN-2032\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;/g&gt;&lt;/g&gt;&lt;/svg&gt;&lt;span role=\"presentation\"&gt;&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msup is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;γ&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mo is=\"true\"&gt;′&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;&lt;/span&gt;&lt;script type=\"math/mml\"&gt;&lt;math&gt;&lt;msup is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;γ&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mo is=\"true\"&gt;′&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/script&gt;&lt;/span&gt;-strengthened chemically complex alloys (CCAs) at high temperature critically depends on the thermal stability of &lt;span&gt;&lt;span style=\"\"&gt;&lt;/span&gt;&lt;span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msup is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;&amp;#x3B3;&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mo is=\"true\"&gt;&amp;#x2032;&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"&gt;&lt;svg aria-hidden=\"true\" focusable=\"false\" height=\"2.663ex\" role=\"img\" style=\"vertical-align: -0.697ex;\" viewbox=\"0 -846.5 845.9 1146.6\" width=\"1.965ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"&gt;&lt;g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"&gt;&lt;g is=\"true\"&gt;&lt;g is=\"true\"&gt;&lt;g is=\"true\"&gt;&lt;use xlink:href=\"#MJMATHI-3B3\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(551,362)\"&gt;&lt;g is=\"true\"&gt;&lt;use transform=\"scale(0.707)\" xlink:href=\"#MJMAIN-2032\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;/g&gt;&lt;/g&gt;&lt;/svg&gt;&lt;span role=\"presentation\"&gt;&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msup is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;γ&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mo is=\"true\"&gt;′&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;&lt;/span&gt;&lt;script type=\"math/mml\"&gt;&lt;math&gt;&lt;msup is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;γ&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mo is=\"true\"&gt;′&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/script&gt;&lt;/span&gt; precipitates. In this paper, the effects of Ta on the microstructural evolution, the coarsening behavior of &lt;span&gt;&lt;span style=\"\"&gt;&lt;/span&gt;&lt;span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msup is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;&amp;#x3B3;&lt","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"6 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723515","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":"Optimizing the Pore Structure and Properties of Alumina-Based Foamed Ceramics through Curing Condition Prioritization","authors":"Wenying Zhou, Zhenyou Ma, Guotian Ye, Bo Yuan, Zheng Zhang, Degang Zhao","doi":"10.1016/j.jallcom.2025.180065","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180065","url":null,"abstract":"The alumina-based foamed ceramics were prepared using α-alumina powder as raw materials by direct-foaming method. Calcium aluminate cement (CAC) was chosen as a binder to accelerate the solidification of foamed suspensions, and the effect of curing temperature on the rheological properties of suspensions, phase composition, microstructure, pore characteristics, compressive strength and thermal conductivity of foamed ceramics was investigated. What’s more important, the thermal conductivity was analyzed using the Grey relational degree model to explore the effect of the pore characteristics on the thermal conductivity of foamed ceramics. The findings revealed that the higher curing temperature led to the increase in viscosity and stability of the foamed suspensions, as well as a faster hydration rate of CAC, which resulted in a reduction in the pore size of the fired ceramics from 312 μm to 160 μm and the thermal conductivity (1000 ºC) from 0.309<!-- --> <!-- -->W/(m·K) to 0.248<!-- --> <!-- -->W/(m·K). It is worth noting that as the curing temperature rose, the porosity of the ceramics increased while the compressive strength improved from 0.83<!-- --> <!-- -->MPa to 1.26<!-- --> <!-- -->MPa, due to the smaller pore size, the more uniform pore size distribution and more regular pore roundness. According to the Grey relational degree model, pores in the range of 250-300 μm had the most significant impact on the thermal conductivity of the foamed ceramics.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"25 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734188","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":"Structure properties and supercapacitive behavior of hydrothermally synthesized spinel lithium doped manganese cobaltite nanoparticles","authors":"Gh. Abbady, Abdulaziz Abu El-Fadl, A.A. Abu-Sehly, Heba R. Mansour","doi":"10.1016/j.jallcom.2025.179959","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.179959","url":null,"abstract":"Spinel nanostructures of Mn_1–xLi_xCo₂O₄ (x=0.0, 0.5, and 1.0) were synthesized by the hydrothermal method. The structural and morphology properties of Mn_1–xLi_xCo₂O₄ were investigated by X-ray powder diffraction (XRD) spectra, scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), and BET surface area measured from N₂ adsorption-desorption isotherms. The analyzed surface area demonstrated significant improvements after adding the polyvinyl pyrrolidone (PVP) surfactant and the particles are formed uniformly with the presence of some agglomeration in the cubic shape. Supercapacitive measurements were made during electrochemical testing by using the three-electrode system. A brief description of the structure of the prepared samples and the energy storage mechanism of supercapacitors are presented. The behavior of the capacitance for the samples was improved with the addition of the PVP surfactant, reaching the value of 3415.93<!-- --> <!-- -->F<!-- --> <!-- -->g^–1 for LiCo₂O₄+PVP.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"36 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734181","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":"Synthesis of Thick-shell Cu@Ag Particles with Nanorod-shape Surface Morphology for Printed Electronics","authors":"Minghan Yu, Jiayun Feng, SenPei Xie, Yiping Wang, Yongsheng Li, Runze Wang, Guofeng Lu, Kang Li, Rui Wu, Weiwei Zhao, Yanhong Tian","doi":"10.1016/j.jallcom.2025.179870","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.179870","url":null,"abstract":"This paper introduces a method to synthesize thick-shell Cu@Ag particles, with nanorod-shape silver wrapped on the copper surface after substitution and reduction reactions. The average size of silver nanorods is less than 50<!-- --> <!-- -->nm and that of the copper particles is about 1 μm. The surface morphology, structure, and sintering properties of Cu@Ag particles were characterized in detail. The results show that the sintering temperature of thick-shell Cu@Ag is 127.5 °C, which is lower than that of Cu@Ag particles covered with island-shape and block-shape silver nanoparticles. The conductive ink was prepared by mixing it with resin paste, and the bulk conductivity of the conductive paste under different sintering conditions was investigated. The optimal -process parameters were chosen to conduct the printing of radio frequency identification (RFID) antennas. The farthest reading distances achieved by the ultra-high frequency RFID (UHF RFID) and the high-frequency RFID (HF RFID) were 9.4<!-- --> <!-- -->m and 3.5<!-- --> <!-- -->cm, respectively, which have good prospect of practical application.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"34 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734177","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":"High-performance asymmetric supercapacitor applications enabled by nickel foam-supported CoTe/NiCo2S4 core-shell nanorods","authors":"Songyuan Wu, Jiaheng Wang, Linheng Zhao, Yulong Cao, Haoxiang Yang, Xiao Jing, Jiarui Li, Yang Zhao, Jiaxu Gong, Yatang Dai","doi":"10.1016/j.jallcom.2025.180023","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180023","url":null,"abstract":"The quest to achieve high energy density and superior stability in supercapacitors is both attractive and challenging. This work reports a simple method to grow CoTe/NiCo₂S₄ composite electrode materials with core-shell structure. When used as a cathode material, the unique core-shell structure exhibits outstanding electrochemical characteristics, including a superior specific capacitance (1470.45<!-- --> <!-- -->F<!-- --> <!-- -->g^-1 at 1<!-- --> <!-- -->A<!-- --> <!-- -->g^-1), outstanding cycling stability (86.69% after 5000 cycles), and impressive rate performance (77.17% at 10<!-- --> <!-- -->A<!-- --> <!-- -->g^-1). Notably, the asymmetric hybrid supercapacitor constructed using CoTe/NiCo₂S₄ as the cathode and AC/NF as the anode can provide an operating voltage of 1.8<!-- --> <!-- -->V, achieving a peak energy density of 39.8<!-- --> <!-- -->Wh<!-- --> <!-- -->kg^-1 and a highest power density of 832<!-- --> <!-- -->W<!-- --> <!-- -->kg^-1. Moreover, the supercapacitor demonstrates satisfactory rate performance (81.25% at 10<!-- --> <!-- -->A<!-- --> <!-- -->g^-1) and excellent cycling stability (86.61% after 8000 cycles). Furthermore, when assembled into a quasi-solid-state flexible supercapacitor, the device can support a small toy fan to run for 66<!-- --> <!-- -->seconds, thereby highlighting its viability for practical energy storage applications.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"49 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734187","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}