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Low-temperature de-alloying and unique self-filling interface optimization mechanism of layered silicon for enhanced lithium storage.
- Source :
-
Chemical Communications . 9/28/2024, Vol. 60 Issue 76, p10500-10503. 4p. - Publication Year :
- 2024
-
Abstract
- Layered silicon (L–Si) anodes are celebrated for their high theoretical capacity but face significant challenges regarding safety and material purity during preparation. This study addresses these challenges by employing NH4Cl–CaSi2 as the raw material in a gas-solid de-alloying process, which enhances both safety and purity compared to traditional methods. The L–Si anodes produced demonstrate outstanding electrochemical performance, delivering a high reversible lithium storage capacity of 1497.7 mA h g−1 at a current density of 0.5 A g−1, and exhibiting stable performance over 1200 charge–discharge cycles. In situ and ex situ characterizations reveal that electrolyte decomposition products effectively fill the voids within the electrode, while the gradual disintegration of the L–Si structure contributes to the formation of a dense, conductive network. This process enhances lithium ion transport and exploits the capacitive storage benefits of layered silicon. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ION transport (Biology)
*LITHIUM ions
*RAW materials
*ANODES
*ELECTROLYTES
Subjects
Details
- Language :
- English
- ISSN :
- 13597345
- Volume :
- 60
- Issue :
- 76
- Database :
- Academic Search Index
- Journal :
- Chemical Communications
- Publication Type :
- Academic Journal
- Accession number :
- 179735819
- Full Text :
- https://doi.org/10.1039/d4cc03857f