Si (at) SiOx composite material with yolk structure as well as preparation method and application of Si (at) SiOx composite material
The invention discloses a Si-coated SiOx composite material with an egg yolk structure as well as a preparation method and application of the Si-coated SiOx composite material. The average size of the Si-coated SiOx composite material with the yolk structure is 0.03-30 [mu] m, the Si-coated SiOx composite material with the yolk structure is composed of an inner core and a shell, a cavity structure exists between the inner core and the shell, the inner core is porous silicon, the shell is a SiOx layer with the thickness of 2-50 nm, the SiOx layer is free of holes, and x is larger than 0 and smaller than or equal to 2; in the Si (at) SiOx composite material with the yolk structure, the cavity structure accounts for 10-70% of the total volume. According to the invention, the yolk-structured Si-coated SiOx composite material is prepared by a simple one-step etching method, and the yolk-structured Si-coated SiOx composite material has the characteristics of high capacity, good cycle performance and high initial coulombic efficiency when being used as a negative electrode active material of a lithium ion battery..
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Patent| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Europäisches Patentamt - (2023) vom: 22. Dez. Zur Gesamtaufnahme - year:2023 |
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| Sprache: |
Englisch |
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| Beteiligte Personen: |
WU HAO [VerfasserIn] |
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| Links: |
Volltext [kostenfrei] |
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| Anmerkungen: |
Source: www.epo.org (no modifications made), First posted: 2023-12-22, Last update posted on www.tib.eu: 2024-03-13, Last updated: 2024-03-22 |
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| Patentnummer: |
CN117276500 |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
EPA000079731 |
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| 245 | 1 | 0 | |a Si (at) SiOx composite material with yolk structure as well as preparation method and application of Si (at) SiOx composite material |
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| 520 | |a The invention discloses a Si-coated SiOx composite material with an egg yolk structure as well as a preparation method and application of the Si-coated SiOx composite material. The average size of the Si-coated SiOx composite material with the yolk structure is 0.03-30 [mu] m, the Si-coated SiOx composite material with the yolk structure is composed of an inner core and a shell, a cavity structure exists between the inner core and the shell, the inner core is porous silicon, the shell is a SiOx layer with the thickness of 2-50 nm, the SiOx layer is free of holes, and x is larger than 0 and smaller than or equal to 2; in the Si (at) SiOx composite material with the yolk structure, the cavity structure accounts for 10-70% of the total volume. According to the invention, the yolk-structured Si-coated SiOx composite material is prepared by a simple one-step etching method, and the yolk-structured Si-coated SiOx composite material has the characteristics of high capacity, good cycle performance and high initial coulombic efficiency when being used as a negative electrode active material of a lithium ion battery. | ||
| 650 | 4 | |a C01B: Non-metallic elements; compounds thereof (fermentation or enzyme-using processes for the preparation of elements or inorganic compounds except carbon dioxide c12p0003000000; production of non-metallic elements or inorganic compounds by electrolysis or electrophoresis c25b) | |
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| 650 | 4 | |a B82Y: Specific uses or applications of nanostructures; measurement or analysis of nanostructures; manufacture or treatment of nanostructures | |
| 650 | 4 | |a H01M: Processes or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy | |
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