Lithium Permeation through Thin Lithium–Silicon Films for Battery Applications Investigated by Neutron Reflectometry
- verfasst von
- Florian Strauß, Erwin Hüger, Paul Heitjans, Thomas Geue, Jochen Stahn, Harald Schmidt
- Abstract
In the ongoing search for new negative electrode materials for lithium-ion batteries, amorphous silicon with a theoretical specific capacity of almost 4000 mA h g−1 is still one of the most promising candidates. In order to optimize cycling behavior, prelithiation of silicon is discussed as possible solution. Yet, little is known about kinetics in the Li-Si system, especially with a low lithium content. Using neutron reflectometry as a tool, lithium permeation through amorphous LixSi layers was probed during annealing. From the results a lithium permeability (diffusivity×solubility) of P=(3.3±0.9)×10−21 m2 s−1 is derived for LixSi (x≈0.1), which is identical to that of pure amorphous silicon.
- Organisationseinheit(en)
-
Institut für Physikalische Chemie und Elektrochemie
ZFM - Zentrum für Festkörperchemie und Neue Materialien
- Externe Organisation(en)
-
Technische Universität Clausthal
Paul Scherrer Institut (PSI)
- Typ
- Artikel
- Journal
- Energy technology
- Band
- 4
- Seiten
- 1582-1587
- Anzahl der Seiten
- 6
- ISSN
- 2194-4288
- Publikationsdatum
- 01.12.2016
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Allgemeine Energie
- Ziele für nachhaltige Entwicklung
- SDG 7 – Erschwingliche und saubere Energie
- Elektronische Version(en)
-
https://doi.org/10.1002/ente.201600209 (Zugang:
Offen)
