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Updated: Jan 24, 2026

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
Published on: November 10, 2014
Neutron reflectometry to measure in situ the rate determining step of lithium ion transport through thin silicon
Erwin Hüger1, Jochen Stahn2, Paul Heitjans3
1AG Mikrokinetik, Institut für Metallurgie, TU Clausthal, D-38678 Clausthal-Zellerfeld, Germany. erwin.hueger@tu-clausthal.de.
Abstract:
Li ion transport through thin (14-22 nm) amorphous silicon layers adjacent to lithium metal oxide layers (lithium niobate) was studied by in situ neutron reflectometry experiments and the control mechanism was determined. It was found that the interface between amorphous silicon and the oxide material does not hinder Li transport. It is restricted by Li diffusion in the silicon material. This finding based on in situ experiments confirms results obtained ex situ and destructively by secondary ion mass spectrometry (SIMS) depth profiling investigations. The Li permeabilities obtained from the present experiments are in agreement with those obtained from ex situ SIMS measurements showing similar activation enthalpies.
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