Lithium Permeation through Thin Lithium–Silicon Films for Battery Applications Investigated by Neutron Reflectometry
- authored by
- 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.
- Organisation(s)
-
Institute of Physical Chemistry and Electrochemistry
Center for Solid State Chemistry and New Materials (ZFM)
- External Organisation(s)
-
Clausthal University of Technology
Paul Scherrer Institut (PSI)
- Type
- Article
- Journal
- Energy technology
- Volume
- 4
- Pages
- 1582-1587
- No. of pages
- 6
- ISSN
- 2194-4288
- Publication date
- 01.12.2016
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- General Energy
- Sustainable Development Goals
- SDG 7 - Affordable and Clean Energy
- Electronic version(s)
-
https://doi.org/10.1002/ente.201600209 (Access:
Open)
