Construction of WO3 nanowires artificial solid electrolyte interphase on silicon nanoparticles with sea urchin like structure for improving silicon anode stability
Giant volumetric variation of silicon during repeat lithiation/delethiation process leads to structure failure of silicon-based anodes and thus their initial high capacitance is hard to be maintained under long-run cyclic charging/discharging. Construction porous structure silicon composites and for...
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| Language: | English |
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Elsevier
2025-04-01
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| Series: | Next Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949822824002879 |
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| author | Qiao Wu Xiaolai Luo Lisha Zhou Xiang Shen Luhua Lu |
| author_facet | Qiao Wu Xiaolai Luo Lisha Zhou Xiang Shen Luhua Lu |
| author_sort | Qiao Wu |
| collection | DOAJ |
| description | Giant volumetric variation of silicon during repeat lithiation/delethiation process leads to structure failure of silicon-based anodes and thus their initial high capacitance is hard to be maintained under long-run cyclic charging/discharging. Construction porous structure silicon composites and formation of artificial solid electrolyte interphase (SEI) coating on silicon particles are two effective ways to improve stability of silicon-based anodes. In this work, above two strategies are combined to construct a composite of inorganic artificial SEI WO3 nanowires/Si nanoparticles with sea urchin like porous structure via simple hydrothermal method. The silicon nanoparticles act as seeds for around 70 nm average diameter WO3 nanowires formation in compared with that of WO3 nano-rods around 500 nm diameter without Si nanoparticle seeds. The WO3 nanowire artificial SEI coating is found to be effective in preventing SEI overgrowth and their network provides spaces for volumetric variation of silicon nanoparticles in the bulk anode matrix during cyclic test, leading to reversible charging/discharging of stable bulk anode in compared with pure silicon anode of fast capacitance decay. The gravimetric capacitance of optimized composite reaches 1410.6 mAh·g−1 and its capacity remains 1039 mAh·g−1 after 200 cycles. |
| format | Article |
| id | doaj-art-bef6927ba0944e4f9105cd30c223399b |
| institution | DOAJ |
| issn | 2949-8228 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Next Materials |
| spelling | doaj-art-bef6927ba0944e4f9105cd30c223399b2025-08-20T03:14:32ZengElsevierNext Materials2949-82282025-04-01710039010.1016/j.nxmate.2024.100390Construction of WO3 nanowires artificial solid electrolyte interphase on silicon nanoparticles with sea urchin like structure for improving silicon anode stabilityQiao Wu0Xiaolai Luo1Lisha Zhou2Xiang Shen3Luhua Lu4Faculty of Materials Science and Chemistry, China University of Geosciences Wuhan, 388 Lumo Road, Wuhan 430074, PR ChinaFaculty of Materials Science and Chemistry, China University of Geosciences Wuhan, 388 Lumo Road, Wuhan 430074, PR ChinaMontavista Energy Technologies Corporation (Anhui), No.4 Intelligent Technology Park Phase V, 8213 Fanhua Avenue, Hefei 230601, PR ChinaFaculty of Materials Science and Chemistry, China University of Geosciences Wuhan, 388 Lumo Road, Wuhan 430074, PR ChinaFaculty of Materials Science and Chemistry, China University of Geosciences Wuhan, 388 Lumo Road, Wuhan 430074, PR China; Key Laboratory of Geological Survey and Evaluation of Ministry of Education, China University of Geosciences Wuhan, 388 Lumo Road, Wuhan 430074, PR China; Corresponding author at: Faculty of Materials Science and Chemistry, China University of Geosciences Wuhan, 388 Lumo Road, Wuhan 430074, PR China.Giant volumetric variation of silicon during repeat lithiation/delethiation process leads to structure failure of silicon-based anodes and thus their initial high capacitance is hard to be maintained under long-run cyclic charging/discharging. Construction porous structure silicon composites and formation of artificial solid electrolyte interphase (SEI) coating on silicon particles are two effective ways to improve stability of silicon-based anodes. In this work, above two strategies are combined to construct a composite of inorganic artificial SEI WO3 nanowires/Si nanoparticles with sea urchin like porous structure via simple hydrothermal method. The silicon nanoparticles act as seeds for around 70 nm average diameter WO3 nanowires formation in compared with that of WO3 nano-rods around 500 nm diameter without Si nanoparticle seeds. The WO3 nanowire artificial SEI coating is found to be effective in preventing SEI overgrowth and their network provides spaces for volumetric variation of silicon nanoparticles in the bulk anode matrix during cyclic test, leading to reversible charging/discharging of stable bulk anode in compared with pure silicon anode of fast capacitance decay. The gravimetric capacitance of optimized composite reaches 1410.6 mAh·g−1 and its capacity remains 1039 mAh·g−1 after 200 cycles.http://www.sciencedirect.com/science/article/pii/S2949822824002879SiliconVolumetric variationCompositeAnodeLithium-ion batteries |
| spellingShingle | Qiao Wu Xiaolai Luo Lisha Zhou Xiang Shen Luhua Lu Construction of WO3 nanowires artificial solid electrolyte interphase on silicon nanoparticles with sea urchin like structure for improving silicon anode stability Next Materials Silicon Volumetric variation Composite Anode Lithium-ion batteries |
| title | Construction of WO3 nanowires artificial solid electrolyte interphase on silicon nanoparticles with sea urchin like structure for improving silicon anode stability |
| title_full | Construction of WO3 nanowires artificial solid electrolyte interphase on silicon nanoparticles with sea urchin like structure for improving silicon anode stability |
| title_fullStr | Construction of WO3 nanowires artificial solid electrolyte interphase on silicon nanoparticles with sea urchin like structure for improving silicon anode stability |
| title_full_unstemmed | Construction of WO3 nanowires artificial solid electrolyte interphase on silicon nanoparticles with sea urchin like structure for improving silicon anode stability |
| title_short | Construction of WO3 nanowires artificial solid electrolyte interphase on silicon nanoparticles with sea urchin like structure for improving silicon anode stability |
| title_sort | construction of wo3 nanowires artificial solid electrolyte interphase on silicon nanoparticles with sea urchin like structure for improving silicon anode stability |
| topic | Silicon Volumetric variation Composite Anode Lithium-ion batteries |
| url | http://www.sciencedirect.com/science/article/pii/S2949822824002879 |
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