Additive manufacturing (AM) has become a crucial technique for fabricating high-performance superalloys. K447A, a promising candidate for high-temperature applications, exhibits significant cracking issues during AM processing. In this study, a mixture of K447A and IN718 powders was processed via selective laser melting (SLM) to enhance mechanical properties and minimize cracking. The optimal composition was identified as KI28 (20% K447A, 80% IN718). Microstructural analysis revealed that KI28 exhibited the smallest laser melt pool area and a short-chain Laves phase morphology, reducing crack formation. Additionally, mechanical testing demonstrated that the increased IN718 content improved tensile strength and ductility. These findings provide valuable insights for optimizing Ni-based superalloys through AM processing.
{"title":"Microstructures and properties of selective laser melted K447A/IN718 Ni-based superalloy composites","authors":"Yu Zhang , Zhen Ding , Bing Tian , Fengchun Jiang , Mehrdad Zarinejad , Yunxiang Tong","doi":"10.1016/j.matlet.2025.138598","DOIUrl":"10.1016/j.matlet.2025.138598","url":null,"abstract":"<div><div>Additive manufacturing (AM) has become a crucial technique for fabricating high-performance superalloys. K447A, a promising candidate for high-temperature applications, exhibits significant cracking issues during AM processing. In this study, a mixture of K447A and IN718 powders was processed via selective laser melting (SLM) to enhance mechanical properties and minimize cracking. The optimal composition was identified as KI28 (20% K447A, 80% IN718). Microstructural analysis revealed that KI28 exhibited the smallest laser melt pool area and a short-chain Laves phase morphology, reducing crack formation. Additionally, mechanical testing demonstrated that the increased IN718 content improved tensile strength and ductility. These findings provide valuable insights for optimizing Ni-based superalloys through AM processing.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"393 ","pages":"Article 138598"},"PeriodicalIF":2.7,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-04-18DOI: 10.1016/j.matlet.2025.138574
Zhiyuan Lu , Yongjiao Sun , Bingliang Wang , Yuchen Hou , Wenyuan Zhao , Zihan Wei , Wendong Zhang , Koichi Suematsu , Jie Hu
In this work, two-dimensional (2D) conductive metal–organic frameworks Mg3(HITP)2 nanosheet functionalized with MoS2 and Pd NPs hybrid structures were synthesized toward NO2 detection under ultrahigh humid atmosphere at room temperature (RT). The morphology, chemical state and element composition were systematically investigated by different methods, and gas sensing experiments were conducted on the as-proposed sensors toward NO2 at RT under 95 %RH. Obviously, the optimum Pd1/Mo10/MgHI sensor exhibits high response, good linearity, excellent selectivity and repeatability, and the measured response can reach to 55 toward 100 ppm NO2, which is almost two times higher than that of Mo10/MgHI sensor (28). The enhanced NO2 sensing performance can be attributed to the synergistic effect between the interfaces of the sensing nanocomponents, which opens a new way for detecting NO2 under ultrahigh humid environment at RT.
{"title":"Synthesis and gas sensing properties of MoS2 and Pd NPs functionalized conductive Mg3(HITP)2 hybrid structures toward NO2 detection in ultrahigh humidity environment at room temperature","authors":"Zhiyuan Lu , Yongjiao Sun , Bingliang Wang , Yuchen Hou , Wenyuan Zhao , Zihan Wei , Wendong Zhang , Koichi Suematsu , Jie Hu","doi":"10.1016/j.matlet.2025.138574","DOIUrl":"10.1016/j.matlet.2025.138574","url":null,"abstract":"<div><div>In this work, two-dimensional (2D) conductive metal–organic frameworks Mg<sub>3</sub>(HITP)<sub>2</sub> nanosheet functionalized with MoS<sub>2</sub> and Pd NPs hybrid structures were synthesized toward NO<sub>2</sub> detection under ultrahigh humid atmosphere at room temperature (RT). The morphology, chemical state and element composition were systematically investigated by different methods, and gas sensing experiments were conducted on the as-proposed sensors toward NO<sub>2</sub> at RT under 95 %RH. Obviously, the optimum Pd<sub>1</sub>/Mo<sub>10</sub>/MgHI sensor exhibits high response, good linearity, excellent selectivity and repeatability, and the measured response can reach to 55 toward 100 ppm NO<sub>2</sub>, which is almost two times higher than that of Mo<sub>10</sub>/MgHI sensor (28). The enhanced NO<sub>2</sub> sensing performance can be attributed to the synergistic effect between the interfaces of the sensing nanocomponents, which opens a new way for detecting NO<sub>2</sub> under ultrahigh humid environment at RT.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"394 ","pages":"Article 138574"},"PeriodicalIF":2.7,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this work, a high-performance Joule heater is proposed, which is composed of LIG as the heating layer and medical band-aids as the substrate. Thanks to the sodium lignosulfonate as carbon source, laser-induced graphene (LIG), is successfully prepared on the medical band-aids. The Joule heater exhibits remarkable electrothermal performance, capable of reaching a high temperature of 96.6 °C at a low operating voltage of 8 V. The band-aid-assisted LIG-based Joule heater is demonstrated for thermotherapy applications, showing good heating temperature controllability. This work can provide a solution for the development of comfortable LIG-based flexible electronics based on medical band-aids.
{"title":"Band-aid-assisted Joule heater based on laser-induced graphene for thermotherapy applications","authors":"Yexiong Huang, Zikai Bao, Tingyu Liu, Chunxin Hao, Xinyuan Wang, Jinmin Li","doi":"10.1016/j.matlet.2025.138602","DOIUrl":"10.1016/j.matlet.2025.138602","url":null,"abstract":"<div><div>In this work, a high-performance Joule heater is proposed, which is composed of LIG as the heating layer and medical band-aids as the substrate. Thanks to the sodium lignosulfonate as carbon source, laser-induced graphene (LIG), is successfully prepared on the medical band-aids. The Joule heater exhibits remarkable electrothermal performance, capable of reaching a high temperature of 96.6 °C at a low operating voltage of 8 V. The band-aid-assisted LIG-based Joule heater is demonstrated for thermotherapy applications, showing good heating temperature controllability. This work can provide a solution for the development of comfortable LIG-based flexible electronics based on medical band-aids.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"393 ","pages":"Article 138602"},"PeriodicalIF":2.7,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-04-18DOI: 10.1016/j.matlet.2025.138599
Lin Fu , Hongjie Jiang , Kai Huang , Hao Cheng , Chongyu Liu , Hongfeng Huang , Shuhui Liu
FSP-ZA27/7075Al composites with enhanced high-temperature damping capacity were fabricated using friction stir processing. The interface bonding between the ZA27 and 7075Al alloys is strong, with no apparent defects or new phase formation in the composites. The improved damping capacity and comprehensive damping index of the composites, in comparison to the 7075Al alloy, result from the contributions of grain refinement and the inherent damping capacity of the reinforcement phase. At 300 °C, the internal friction value of the composites is 798 % and 1258 % greater than that of FSP-7075Al and 7075-T651 Al alloys, respectively. At 275 °C, the composites show internal friction peaks similar to those of the ZA27 alloy.
{"title":"Microstructure and damping capacity of high-temperature damping ZA27/7075Al composites prepared by friction stir processing","authors":"Lin Fu , Hongjie Jiang , Kai Huang , Hao Cheng , Chongyu Liu , Hongfeng Huang , Shuhui Liu","doi":"10.1016/j.matlet.2025.138599","DOIUrl":"10.1016/j.matlet.2025.138599","url":null,"abstract":"<div><div>FSP-ZA27/7075Al composites with enhanced high-temperature damping capacity were fabricated using friction stir processing. The interface bonding between the ZA27 and 7075Al alloys is strong, with no apparent defects or new phase formation in the composites. The improved damping capacity and comprehensive damping index of the composites, in comparison to the 7075Al alloy, result from the contributions of grain refinement and the inherent damping capacity of the reinforcement phase. At 300 °C, the internal friction value of the composites is 798 % and 1258 % greater than that of FSP-7075Al and 7075-T651 Al alloys, respectively. At 275 °C, the composites show internal friction peaks similar to those of the ZA27 alloy.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"393 ","pages":"Article 138599"},"PeriodicalIF":2.7,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-04-18DOI: 10.1016/j.matlet.2025.138605
V. Shivani , S. Sriram
This study identifies Moiré Bilayer MoS2 (mBL-MoS2) as a viable anode for sodium-ion batteries (SIBs). The structure demonstrates a favorable formation energy of –49.54 meV, with thermodynamic stability during Na-ion incorporation. With a low intercalation energy of –2.38 eV mBL-MoS2 exhibits an ultra-low diffusion barrier energy of 0.0214 eV, which facilitates rapid ion transport with an optimal open-circuit voltage (OCV) of 2.38 V. Sodium ions preferentially adsorb at sulfur sites, with a high theoretical specific capacity of 167.5 mAh/g for single Na+ insertion. Additionally, the enhanced electronic conductivity further substantiates the potential of mBL-MoS2 as a high-performance anode material.
{"title":"Moiré bilayer MoS2 as a next-generation sodium-ion battery anode: A DFT analysis","authors":"V. Shivani , S. Sriram","doi":"10.1016/j.matlet.2025.138605","DOIUrl":"10.1016/j.matlet.2025.138605","url":null,"abstract":"<div><div>This study identifies Moiré Bilayer MoS<sub>2</sub> (mBL-MoS<sub>2</sub>) as a viable anode for sodium-ion batteries (SIBs). The structure demonstrates a favorable formation energy of –49.54 meV, with thermodynamic stability during Na-ion incorporation. With a low intercalation energy of –2.38 eV mBL-MoS<sub>2</sub> exhibits an ultra-low diffusion barrier energy of 0.0214 eV, which facilitates rapid ion transport with an optimal open-circuit voltage (OCV) of 2.38 V. Sodium ions preferentially adsorb at sulfur sites, with a high theoretical specific capacity of 167.5 mAh/g for single Na<sup>+</sup> insertion. Additionally, the enhanced electronic conductivity further substantiates the potential of mBL-MoS<sub>2</sub> as a high-performance anode material.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"393 ","pages":"Article 138605"},"PeriodicalIF":2.7,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The stability of two metastable structures (D019 and D03) in Fe3Ga-type alloy was investigated using EBSD analysis on stepwise annealing at elevated temperatures 475 and 550 °C. Initially, the Fe-28 Ga alloy quenched from 640 °C in liquid nitrogen, i.e. from the range of equilibrium D019 phase, exhibits a dominant metastable D019 phase (97 % or more) at room temperature. Being subjected to annealing at 475 °C, the D019 phase demonstrates much higher stability, compared with D03 structure, at early annealing stages, with only a little amount transitioning to L12 phase after 60 min. With an increase in annealing temperature to 550 °C, the D019 structure transforms more rapidly to L12 over the same annealing period. The little amount of D03 phase (∼3%) in the structure of the quenched sample exhibits priority in the transition to L12 compared to D019 at both temperatures, fully transforming within 5 min at 550 °C and disappearing after 60 min at 475 °C, which is additionally proved using a 26 %Ga sample with a mixture of D03 and D019 phases. These findings highlight distinct kinetic differences between D019 and D03 transitions and proposed dependence on their equilibrium temperature, as summarized in the constructed TTT-diagrams. This phase stability study provides insights into tailoring functional properties of Fe-Ga alloys.
{"title":"Relative stability of the metastable D019 and D03 structures in Fe3Ga-type alloys at elevated temperatures","authors":"D.O. Uyi , V.V. Cheverikin , V.V. Palacheva , I.S. Golovin","doi":"10.1016/j.matlet.2025.138590","DOIUrl":"10.1016/j.matlet.2025.138590","url":null,"abstract":"<div><div>The stability of two metastable structures (D0<sub>19</sub> and D0<sub>3</sub>) in Fe<sub>3</sub>Ga-type alloy was investigated using EBSD analysis on stepwise annealing at elevated temperatures 475 and 550 °C. Initially, the Fe-28 Ga alloy quenched from 640 °C in liquid nitrogen, i.e. from the range of equilibrium D0<sub>19</sub> phase, exhibits a dominant metastable D0<sub>19</sub> phase (97 % or more) at room temperature. Being subjected to annealing at 475 °C, the D0<sub>19</sub> phase demonstrates much higher stability, compared with D0<sub>3</sub> structure, at early annealing stages, with only a little amount transitioning to L1<sub>2</sub> phase after 60 min. With an increase in annealing temperature to 550 °C, the D0<sub>19</sub> structure transforms more rapidly to L1<sub>2</sub> over the same annealing period. The little amount of D0<sub>3</sub> phase (∼3%) in the structure of the quenched sample exhibits priority in the transition to L1<sub>2</sub> compared to D0<sub>19</sub> at both temperatures, fully transforming within 5 min at 550 °C and disappearing after 60 min at 475 °C, which is additionally proved using a 26 %Ga sample with a mixture of D0<sub>3</sub> and D0<sub>19</sub> phases. These findings highlight distinct kinetic differences between D0<sub>19</sub> and D0<sub>3</sub> transitions and proposed dependence on their equilibrium temperature, as summarized in the constructed TTT-diagrams. This phase stability study provides insights into tailoring functional properties of Fe-Ga alloys.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"393 ","pages":"Article 138590"},"PeriodicalIF":2.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-04-16DOI: 10.1016/j.matlet.2025.138589
Gökhan Özer , İbrahim Tütük , Umut Can Cingöz , Ebubekir Koç , Ahmet Karaaslan
In this study, AlSi10Mg samples were produced using the Powder Bed Laser Fusion (PBLF) method with standard parameters. Specimens were retrogression and re-aging (RRA) heat-treated at various conditions. The effects of the RRA heat treatments on the properties of PBLF parts were examined by microstructure, electrical conductivity, and electrochemical corrosion tests. Microstructural properties were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy-dispersive X-ray (EDS) analysis. The results showed that after RRA heat treatment, the electrical conductivity of the material decreased slightly, and the corrosion resistance increased.
{"title":"The Role of RRA heat treatments on corrosion behaviour of AlSi10Mg produced by additive manufacturing","authors":"Gökhan Özer , İbrahim Tütük , Umut Can Cingöz , Ebubekir Koç , Ahmet Karaaslan","doi":"10.1016/j.matlet.2025.138589","DOIUrl":"10.1016/j.matlet.2025.138589","url":null,"abstract":"<div><div>In this study, AlSi10Mg samples were produced using the Powder Bed Laser Fusion (PBLF) method with standard parameters. Specimens were retrogression and re-aging (RRA) heat-treated at various conditions. The effects of the RRA heat treatments on the properties of PBLF parts were examined by microstructure, electrical conductivity, and electrochemical corrosion tests. Microstructural properties were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy-dispersive X-ray (EDS) analysis. The results showed that after RRA heat treatment, the electrical conductivity of the material decreased slightly, and the corrosion resistance increased.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"393 ","pages":"Article 138589"},"PeriodicalIF":2.7,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-04-16DOI: 10.1016/j.matlet.2025.138588
Priyabrata Das , Pulak Mohan Pandey
The study focuses on the preparation of a medium entropy alloy (MEA) reinforced Magnesium foam using carbamide particles as space holders for energy absorption application. A refractory BCC MEA (TiMoNb) prealloyed powder was used as reinforcement in the Mg matrix to improve mechanical properties. The carbamide particles were removed through sintering dissolution process at 300℃, followed by microwave sintering at 550℃ for 15 min with a heating rate of 20 K/min. The homogeneous mixing of TiMoNb reinforcement in the Mg matrix was confirmed through XRD analysis and EDX color mapping. The reinforcement content was varied from 0 to 10 wt% (wt %) while keeping the porosity of foam within the range of 33–38 %. The foam containing 7.5 wt% reinforcement showed an improvement of 81.6 % and 210.6 % in peak strength and energy absorption values respectively as compared to the Mg foam.
{"title":"TiMoNb reinforced magnesium composite foam for enhanced mechanical performance and energy absorption","authors":"Priyabrata Das , Pulak Mohan Pandey","doi":"10.1016/j.matlet.2025.138588","DOIUrl":"10.1016/j.matlet.2025.138588","url":null,"abstract":"<div><div>The study focuses on the preparation of a medium entropy alloy (MEA) reinforced Magnesium foam using carbamide particles as space holders for energy absorption application. A refractory BCC MEA (TiMoNb) prealloyed powder was used as reinforcement in the Mg matrix to improve mechanical properties. The carbamide particles were removed through sintering dissolution process at 300℃, followed by microwave sintering at 550℃ for 15 min with a heating rate of 20 K/min. The homogeneous mixing of TiMoNb reinforcement in the Mg matrix was confirmed through XRD analysis and EDX color mapping. The reinforcement content was varied from 0 to 10 wt% (wt %) while keeping the porosity of foam within the range of 33–38 %. The foam containing 7.5 wt% reinforcement showed an improvement of 81.6 % and 210.6 % in peak strength and energy absorption values respectively as compared to the Mg foam.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"393 ","pages":"Article 138588"},"PeriodicalIF":2.7,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, we develop a novel TMB-derived colorimetric probe system by successfully loading gold nanoparticles on wood-derived carbon-based materials by thermal decomposition method, and the colorimetric detection performance of the composites was studied. The results show that the wood-derived carbon-based composites (Au/C) with high sensitivity (the lowest detection limit of Au/C composites for Hg2+ was 0.2 nM), anti-interference and strong specificity in detecting Hg2+. In addition, the Au/C composite material presented a good linear relationship in the low concentration range of 0–200 nM.
{"title":"Preparation of wood-derived carbon-based composites for highly efficient detection of Hg2+","authors":"Jingwei Tian, Dongxu Yang, Ge Li, Yu Song, Erli Ding, Benhua Xu","doi":"10.1016/j.matlet.2025.138591","DOIUrl":"10.1016/j.matlet.2025.138591","url":null,"abstract":"<div><div>In this study, we develop a novel TMB-derived colorimetric probe system by successfully loading gold nanoparticles on wood-derived carbon-based materials by thermal decomposition method, and the colorimetric detection performance of the composites was studied. The results show that the wood-derived carbon-based composites (Au/C) with high sensitivity (the lowest detection limit of Au/C composites for Hg<sup>2+</sup> was 0.2 nM), anti-interference and strong specificity in detecting Hg<sup>2+</sup>. In addition, the Au/C composite material presented a good linear relationship in the low concentration range of 0–200 nM.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"393 ","pages":"Article 138591"},"PeriodicalIF":2.7,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-04-15DOI: 10.1016/j.matlet.2025.138586
Zengmou Li , Xiaoling Liu , Qianwen Wang, Xinyu Jiang, Rui Yan, Keyu Zhang, Yaochun Yao, Shaoze Zhang, Yin Li, Junxian Hu
Serious volume expansion for silicon-based material has extremely restricted its widespread application. Herein, Si@Na2SiO3 composite with grape-liked structure was fabricated by a simple metal salt-assisted chemical etching method, which is enabled by the high corrosivity of NaHCO3. The gelatinous Na2SiO3 can evenly coat the surface of Si nanoparticles, then efficiently inhibiting volume expansion. Meanwhile, porous structures etched by NaHCO3 provide more diffusion channels for Li+. Si@Na2SiO3 exhibits excellent cycling and rate properties: the discharge capacity of 1140.16mAh g−1 at 0.5 A g-1after 100th cycling and the stable discharge capacity of 1565.64 mAh g−1 at 2.0 A g−1. This research provides a simple and effective technology to exploit the high-capacity silicon-based anode material.
{"title":"Grape-liked Si@Na2SiO3 composites for stable lithium storage though a metal salt-assisted chemical etching approach","authors":"Zengmou Li , Xiaoling Liu , Qianwen Wang, Xinyu Jiang, Rui Yan, Keyu Zhang, Yaochun Yao, Shaoze Zhang, Yin Li, Junxian Hu","doi":"10.1016/j.matlet.2025.138586","DOIUrl":"10.1016/j.matlet.2025.138586","url":null,"abstract":"<div><div>Serious volume expansion for silicon-based material has extremely restricted its widespread application. Herein, Si@Na<sub>2</sub>SiO<sub>3</sub> composite with grape-liked structure was fabricated by a simple metal salt-assisted chemical etching method, which is enabled by the high corrosivity of NaHCO<sub>3</sub>. The gelatinous Na<sub>2</sub>SiO<sub>3</sub> can evenly coat the surface of Si nanoparticles, then efficiently inhibiting volume expansion. Meanwhile, porous structures etched by NaHCO<sub>3</sub> provide more diffusion channels for Li<sup>+</sup>. Si@Na<sub>2</sub>SiO<sub>3</sub> exhibits excellent cycling and rate properties: the discharge capacity of 1140.16mAh g<sup>−1</sup> at 0.5 A g<sup>-1</sup>after 100th cycling and the stable discharge capacity of 1565.64 mAh g<sup>−1</sup> at 2.0 A g<sup>−1</sup>. This research provides a simple and effective technology to exploit the high-capacity silicon-based anode material.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"393 ","pages":"Article 138586"},"PeriodicalIF":2.7,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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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