Scalable Fabrication of Si-Graphene Composite as Anode for Li-ion Batteries
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| הוצא לאור ב: | Applied Sciences vol. 12, no. 21 (2022), p. 10926 |
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| מחבר ראשי: | |
| מחברים אחרים: | , , , , , , , |
| יצא לאור: |
MDPI AG
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| נושאים: | |
| גישה מקוונת: | Citation/Abstract Full Text + Graphics Full Text - PDF |
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| Resumen: | A facile and scalable method is reported to fabricate Si-graphene nanocomposite as anode material for Li-ion batteries (LIBs) with high capacity and capacity retention performance. The Si-graphene electrode showed an initial discharge capacity of 1307 mAh g−1 at a current rate of 0.1C. At the 25th cycle, the electrode retained a discharge capacity of 1270 mAh g−1, with an excellent capacity retention of 97%. At the 50th cycle, the electrode still retained high capacity retention of 89%. The improved capacity retention of Si-graphene anode compared with Si anode is attributed to the mechanical flexibility of graphene that compromises the volume expansion of Si during the lithiation/delithiation process. The electrochemical impedance measurement further confirms the enhanced electrical conductivity and the denser solid-electrolyte-interface of the Si-graphene electrode. This fabrication approach is cost-effective and easy to scale up compared to known techniques, making it a promising candidate for commercializing Si-based anode for LIBs. |
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| ISSN: | 2076-3417 |
| DOI: | 10.3390/app122110926 |
| Fuente: | Publicly Available Content Database |