To address volume expansion of bismuth-based anode materials for sodium-ion batteries, a double-carbon layer protection strategy is proposed to fabricate Bi nanoparticles uniformly dispersed in porous dual-layer carbon nanofibers (Bi@C@CNFs). It is found that the Kirkendall effect in the process of high-temperature carbonization can realize the double-carbon layer construction from the pyrolysis of Cu-H3BTC@PAN, while the displacement reaction introduces Bi and evenly disperses it in carbon nanofibers. As anode material evaluated for sodium-ion batteries, Bi@C@CNFs(Cu) anode exhibits an high initial discharge capacity of 825.2 mA h g-1 at 1.0 A g-1, remaining 372.9 mA h g-1 after 200 cycles. Even at a high current density of 2.0 A g-1, Bi@C@CNFs(Cu) anode demonstrates remarkable performance with a specific capacity of 301.2 mAh g-1. Notably, when the current density is decreased back to 0.1 A g-1, the specific capacity recovers to 551 mAh g-1. The excellent sodium storage is ascribed to the synergistic effect of the homogeneous dispersion and porous double-carbon layer fiber network. The homogeneous Bi distribution of Bi alleviates volume expansion, while the porous dual-layer carbon fiber network not only accommodates volume expansion, but also accelerates the kinetics of electrochemical reaction and enhances the electroconductivity.
{"title":"Double-carbon layer protection strategy for enhancing the sodium storage of Bi@C@CNFs composites with three-dimensional structure","authors":"Ben Hu, Shuya Zhang, Zhenpeng Zhu, Xingmei Guo, Yuanjun Liu, Xiangjun Zheng, Qianqian Fan, Zhongyao Duan, Qinghong Kong, Junhao Zhang","doi":"10.1016/j.jallcom.2026.186672","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186672","url":null,"abstract":"To address volume expansion of bismuth-based anode materials for sodium-ion batteries, a double-carbon layer protection strategy is proposed to fabricate Bi nanoparticles uniformly dispersed in porous dual-layer carbon nanofibers (Bi@C@CNFs). It is found that the Kirkendall effect in the process of high-temperature carbonization can realize the double-carbon layer construction from the pyrolysis of Cu-H<sub>3</sub>BTC@PAN, while the displacement reaction introduces Bi and evenly disperses it in carbon nanofibers. As anode material evaluated for sodium-ion batteries, Bi@C@CNFs(Cu) anode exhibits an high initial discharge capacity of 825.2<!-- --> <!-- -->mA<!-- --> <!-- -->h g<sup>-1</sup> at 1.0<!-- --> <!-- -->A<!-- --> <!-- -->g<sup>-1</sup>, remaining 372.9<!-- --> <!-- -->mA<!-- --> <!-- -->h g<sup>-1</sup> after 200 cycles. Even at a high current density of 2.0<!-- --> <!-- -->A<!-- --> <!-- -->g<sup>-1</sup>, Bi@C@CNFs(Cu) anode demonstrates remarkable performance with a specific capacity of 301.2 mAh g<sup>-1</sup>. Notably, when the current density is decreased back to 0.1<!-- --> <!-- -->A<!-- --> <!-- -->g<sup>-1</sup>, the specific capacity recovers to 551 mAh g<sup>-1</sup>. The excellent sodium storage is ascribed to the synergistic effect of the homogeneous dispersion and porous double-carbon layer fiber network. The homogeneous Bi distribution of Bi alleviates volume expansion, while the porous dual-layer carbon fiber network not only accommodates volume expansion, but also accelerates the kinetics of electrochemical reaction and enhances the electroconductivity.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"9 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122160","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":"Synergistic Regulation of the TRIP Effect and Phase Stability on the Microstructural Evolution and Mechanical Behavior of Metastable TiZrHfNb Alloys","authors":"Liang Li, Zefeng Chen, Shiwen Hu, Dandan Zhu, Lanfeng Li, Wu Yang, Hui Quan, Dexue Liu","doi":"10.1016/j.jallcom.2026.186669","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186669","url":null,"abstract":"","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"17 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134284","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":"Synergistic nanocrystallization via high-entropy design and containerless solidification for transparent luminescent glass-ceramics","authors":"Jingrong Zhang, Runqiu Lang, Xiaoyan Zhang, Xiwei Qi","doi":"10.1016/j.jallcom.2026.186675","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186675","url":null,"abstract":"","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"92 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134275","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":"Simultaneous Strength and Ductility Enhancement in In-situ Alloying Ti6Al4V Alloy by Trace Carbon Addition via Laser Powder Bed Fusion (LPBF)","authors":"Hamidreza Shahriari, Homam Naffakh-Moosavy, Mohammad Hossein Mosallanejad, Luca Iuliano, Abdollah Saboori","doi":"10.1016/j.jallcom.2026.186673","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186673","url":null,"abstract":"","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"95 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134288","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}
Pub Date : 2026-02-06DOI: 10.1016/j.jallcom.2026.186463
Abdelhamid Ait M’hid, Guojian Li, Zhe Wang, Shang Sun, Mourad Boughrara, Mohamed Kerouad, Qiang Wang
We present a combined experimental and theoretical study on the thermoelectric properties of undoped, Al-doped, Co-doped, and (Al, Co)-co-doped ZnO thin films deposited on AlO substrates. All films crystallize in the hexagonal wurtzite structure, while doping markedly modifies their microstructure and transport behavior. Al incorporation improves crystallinity and surface smoothness, whereas Co doping introduces structural disorder and enhanced carrier scattering; co-doping results in an intermediate morphology. Electrical measurements reveal that Al doping significantly lowers resistivity, while Co doping suppresses charge transport. Notably, the (Al, Co)-co-doped film exhibits a strong temperature-dependent resistivity reduction and achieves the highest power factor of approximately 350 W m−1 K−2 at 250 °C. Hall measurements confirm n-type conduction for all films and show that Al doping enhances both carrier concentration and mobility, while Co reduces mobility due to increased scattering. First-principles density functional theory calculations demonstrate that Al shifts the Fermi level into the conduction band, whereas Co introduces localized in-gap states and reduces lattice thermal conductivity. These modifications in electronic and thermal properties directly affect the thermoelectric performance, as evidenced by a calculated figure of merit approaching 0.18 at 1000 K for the (Al, Co)-co-doped film. This improvement in highlights the potential of Al/Co co-doping to optimize both electrical conductivity and thermal conductivity, making ZnO-based thin films promising candidates for high-performance thermoelectric applications.
{"title":"Power factor optimization in Al–, Co–, and Al–Co co-doped ZnO thin films deposited on Al2O3 substrates: Experimental and theoretical insights","authors":"Abdelhamid Ait M’hid, Guojian Li, Zhe Wang, Shang Sun, Mourad Boughrara, Mohamed Kerouad, Qiang Wang","doi":"10.1016/j.jallcom.2026.186463","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186463","url":null,"abstract":"We present a combined experimental and theoretical study on the thermoelectric properties of undoped, Al-doped, Co-doped, and (Al, Co)-co-doped ZnO thin films deposited on Al<span><span><math><msub is=\"true\"><mrow is=\"true\"></mrow><mrow is=\"true\"><mn is=\"true\">2</mn></mrow></msub></math></span><script type=\"math/mml\"><math><msub is=\"true\"><mrow is=\"true\"></mrow><mrow is=\"true\"><mn is=\"true\">2</mn></mrow></msub></math></script></span>O<span><span><math><msub is=\"true\"><mrow is=\"true\"></mrow><mrow is=\"true\"><mn is=\"true\">3</mn></mrow></msub></math></span><script type=\"math/mml\"><math><msub is=\"true\"><mrow is=\"true\"></mrow><mrow is=\"true\"><mn is=\"true\">3</mn></mrow></msub></math></script></span> substrates. All films crystallize in the hexagonal wurtzite structure, while doping markedly modifies their microstructure and transport behavior. Al incorporation improves crystallinity and surface smoothness, whereas Co doping introduces structural disorder and enhanced carrier scattering; co-doping results in an intermediate morphology. Electrical measurements reveal that Al doping significantly lowers resistivity, while Co doping suppresses charge transport. Notably, the (Al, Co)-co-doped film exhibits a strong temperature-dependent resistivity reduction and achieves the highest power factor of approximately 350 <span><span><math><mi is=\"true\" mathvariant=\"normal\">μ</mi></math></span><script type=\"math/mml\"><math><mi mathvariant=\"normal\" is=\"true\">μ</mi></math></script></span>W m<sup>−1</sup> K<sup>−2</sup> at 250 °C. Hall measurements confirm n-type conduction for all films and show that Al doping enhances both carrier concentration and mobility, while Co reduces mobility due to increased scattering. First-principles density functional theory calculations demonstrate that Al shifts the Fermi level into the conduction band, whereas Co introduces localized in-gap states and reduces lattice thermal conductivity. These modifications in electronic and thermal properties directly affect the thermoelectric performance, as evidenced by a calculated figure of merit <span><span><math><mrow is=\"true\"><mi is=\"true\">z</mi><mi is=\"true\">T</mi></mrow></math></span><script type=\"math/mml\"><math><mrow is=\"true\"><mi is=\"true\">z</mi><mi is=\"true\">T</mi></mrow></math></script></span> approaching 0.18 at 1000 K for the (Al, Co)-co-doped film. This improvement in <span><span><math><mrow is=\"true\"><mi is=\"true\">z</mi><mi is=\"true\">T</mi></mrow></math></span><script type=\"math/mml\"><math><mrow is=\"true\"><mi is=\"true\">z</mi><mi is=\"true\">T</mi></mrow></math></script></span> highlights the potential of Al/Co co-doping to optimize both electrical conductivity and thermal conductivity, making ZnO-based thin films promising candidates for high-performance thermoelectric applications.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"223 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122149","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 Ta addition on microstructure characteristic and tensile property of hard-to-deform Ni-based superalloys","authors":"Tianliang Cui, Xingfei Xie, Wugang Yu, Chao Tang, Jinglong Qu, Jinhui Du","doi":"10.1016/j.jallcom.2026.186655","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186655","url":null,"abstract":"","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"31 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134270","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}
Pub Date : 2026-02-06DOI: 10.1016/j.jallcom.2026.186646
Han Wang, Jian-Xi Li, Jian-Min Pan, Yi Zhan, Li Niu
{"title":"Engineering α-MnO2 morphology and electronic structure through phosphate doping for high-performance NH4+ storage","authors":"Han Wang, Jian-Xi Li, Jian-Min Pan, Yi Zhan, Li Niu","doi":"10.1016/j.jallcom.2026.186646","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186646","url":null,"abstract":"","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"95 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134277","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}
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