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Lithium Pre‐Storage Enables High Initial Coulombic Efficiency and Stable Lithium‐Enriched Silicon/Graphite Anode.
- Source :
-
Angewandte Chemie . Jul2024, Vol. 136 Issue 27, p1-9. 9p. - Publication Year :
- 2024
-
Abstract
- Application of silicon‐based anodes is significantly challenged by low initial Coulombic efficiency (ICE) and poor cyclability. Traditional pre‐lithiation reagents often pose safety concerns due to their unstable chemical nature. Achieving a balance between water‐stability and high ICE in prelithiated silicon is a critical issue. Here, we present a lithium‐enriched silicon/graphite material with an ultra‐high ICE of ≥110 % through a high‐stable lithium pre‐storage methodology. Lithium pre‐storage prepared a nano‐drilled graphite material with surficial lithium functional groups, which can form chemical bonds with adjacent silicon during high‐temperature sintering. This results in an unexpected O−Li−Si interaction, leading to in situ pre‐lithiation of silicon nanoparticles and providing high stability in air and water. Additionally, the lithium‐enriched silicon/graphite materials impart a combination of high ICE, high specific capacity (620 mAh g−1), and long cycling stability (>400 cycles). This study opens up a promising avenue for highly air‐ and water‐stable silicon anode prelithiation methods. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00448249
- Volume :
- 136
- Issue :
- 27
- Database :
- Academic Search Index
- Journal :
- Angewandte Chemie
- Publication Type :
- Academic Journal
- Accession number :
- 178279936
- Full Text :
- https://doi.org/10.1002/ange.202404637