Details
| Original language | English |
|---|---|
| Pages (from-to) | 1582-1587 |
| Number of pages | 6 |
| Journal | Energy technology |
| Volume | 4 |
| Issue number | 12 |
| Publication status | Published - 1 Dec 2016 |
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.
Keywords
- diffusivity, energy materials, neutron reflectometry, permeability, thin films
ASJC Scopus subject areas
- Energy(all)
- General Energy
Sustainable Development Goals
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In: Energy technology, Vol. 4, No. 12, 01.12.2016, p. 1582-1587.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Lithium Permeation through Thin Lithium–Silicon Films for Battery Applications Investigated by Neutron Reflectometry
AU - Strauß, Florian
AU - Hüger, Erwin
AU - Heitjans, Paul
AU - Geue, Thomas
AU - Stahn, Jochen
AU - Schmidt, Harald
N1 - Publisher Copyright: © 2016 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - 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.
AB - 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.
KW - diffusivity
KW - energy materials
KW - neutron reflectometry
KW - permeability
KW - thin films
UR - http://www.scopus.com/inward/record.url?scp=85006190524&partnerID=8YFLogxK
U2 - 10.1002/ente.201600209
DO - 10.1002/ente.201600209
M3 - Article
AN - SCOPUS:85006190524
VL - 4
SP - 1582
EP - 1587
JO - Energy technology
JF - Energy technology
SN - 2194-4288
IS - 12
ER -