A novel 3D porous pseudographite/Si/Ni composite anode material fabricated by a facile method
A novel 3D porous pseudographite/Si/Ni (PG/Si/Ni) composite was prepared by a facile low-temperature calcination method using saturable starch and NiCl2·6H2O as precursors. The pseudographite matrix of PG/Si/Ni was obtained from the reaction between starch and NiCl2·6H2O during the calcination process. Compared to the C/Si electrode, the PG/Si/Ni electrode delivers a high reversible specific capacity of 659.66 mA h g-1 at a current density of 1 A g-1 even after 2000 cycles. In addition, the PG/Si/Ni electrode shows superior rate performance and still maintains a high specific capacity of 1324.01 mA h g-1 when the cycle current density returns to 0.1 A g-1. The porous pseudographite structure is able to improve Li+ diffusion efficiency, reduce pulverization and lead to the formation of stable SEI layers during the cycling process. Therefore, these results suggest that the 3D porous pseudographite/Si/Ni composite is a promising novel anode material. Besides, the low-temperature synthesis method of the pseudographite matrix can be applied for further modification of carbon-based Si anode materials.
Medienart: |
E-Artikel |
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Erscheinungsjahr: |
2020 |
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Erschienen: |
2020 |
Enthalten in: |
Zur Gesamtaufnahme - volume:49 |
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Enthalten in: |
Dalton transactions (Cambridge, England : 2003) - 49(2020), 21 vom: 07. Juni, Seite 7166-7173 |
Sprache: |
Englisch |
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Beteiligte Personen: |
Su, Weiming [VerfasserIn] |
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Links: |
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Themen: |
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Anmerkungen: |
Date Revised 02.06.2020 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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doi: |
10.1039/d0dt00856g |
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funding: |
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Förderinstitution / Projekttitel: |
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PPN (Katalog-ID): |
NLM309952751 |
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520 | |a A novel 3D porous pseudographite/Si/Ni (PG/Si/Ni) composite was prepared by a facile low-temperature calcination method using saturable starch and NiCl2·6H2O as precursors. The pseudographite matrix of PG/Si/Ni was obtained from the reaction between starch and NiCl2·6H2O during the calcination process. Compared to the C/Si electrode, the PG/Si/Ni electrode delivers a high reversible specific capacity of 659.66 mA h g-1 at a current density of 1 A g-1 even after 2000 cycles. In addition, the PG/Si/Ni electrode shows superior rate performance and still maintains a high specific capacity of 1324.01 mA h g-1 when the cycle current density returns to 0.1 A g-1. The porous pseudographite structure is able to improve Li+ diffusion efficiency, reduce pulverization and lead to the formation of stable SEI layers during the cycling process. Therefore, these results suggest that the 3D porous pseudographite/Si/Ni composite is a promising novel anode material. Besides, the low-temperature synthesis method of the pseudographite matrix can be applied for further modification of carbon-based Si anode materials | ||
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700 | 1 | |a Tang, Yuefeng |e verfasserin |4 aut | |
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