Details
| Original language | English |
|---|---|
| Pages (from-to) | 3031-3036 |
| Number of pages | 6 |
| Journal | SOLID STATE IONICS |
| Volume | 177 |
| Issue number | 35-36 |
| Publication status | Published - 30 Nov 2006 |
Abstract
The measurement of diffusion parameters like activation energies and translational jump rates of small cations plays a key role in materials science. Especially the in-depth investigation of Li diffusion in ionic conductors is of great interest, because suitable ionic conductors are needed for, e.g., the development of new secondary ion battery systems. As the standard tracer method is not applicable to study Li diffusion due to the lack of a suitable radioactive isotope, Li diffusion is alternatively probed by solid state NMR techniques. With the different NMR methods being available, diffusion processes can be studied on different length- and timescales. In the present paper we use two-time spin-alignment echo (SAE) NMR for the direct, i.e., model independent, measurement of extremely small translational Li jump rates. To this end, different crystalline and glassy ion conductors like LixTiS2, Li4SiO4 as well as LiNbO3 served as model substances to reveal the special features of this technique. SAE-NMR, which was originally developed for deuterons, has also been applied in a few cases to spin-3/2 nuclei, like 7Li, before. The corresponding correlation functions yield not only information about diffusion parameters but also about geometric properties of the diffusion pathways, making SAE-NMR a powerful method which complements well-established NMR techniques.
Keywords
- Extremely slow motions, Li diffusion, Solid state NMR, Spin-alignment echoes
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: SOLID STATE IONICS, Vol. 177, No. 35-36, 30.11.2006, p. 3031-3036.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - New prospects in studying Li diffusion-two-time stimulated echo NMR of spin-3/2 nuclei
AU - Wilkening, Martin
AU - Heitjans, Paul
N1 - Funding Information: Financial support of the DFG (Deutsche Forschungsgemeinschaft) is gratefully acknowledged.
PY - 2006/11/30
Y1 - 2006/11/30
N2 - The measurement of diffusion parameters like activation energies and translational jump rates of small cations plays a key role in materials science. Especially the in-depth investigation of Li diffusion in ionic conductors is of great interest, because suitable ionic conductors are needed for, e.g., the development of new secondary ion battery systems. As the standard tracer method is not applicable to study Li diffusion due to the lack of a suitable radioactive isotope, Li diffusion is alternatively probed by solid state NMR techniques. With the different NMR methods being available, diffusion processes can be studied on different length- and timescales. In the present paper we use two-time spin-alignment echo (SAE) NMR for the direct, i.e., model independent, measurement of extremely small translational Li jump rates. To this end, different crystalline and glassy ion conductors like LixTiS2, Li4SiO4 as well as LiNbO3 served as model substances to reveal the special features of this technique. SAE-NMR, which was originally developed for deuterons, has also been applied in a few cases to spin-3/2 nuclei, like 7Li, before. The corresponding correlation functions yield not only information about diffusion parameters but also about geometric properties of the diffusion pathways, making SAE-NMR a powerful method which complements well-established NMR techniques.
AB - The measurement of diffusion parameters like activation energies and translational jump rates of small cations plays a key role in materials science. Especially the in-depth investigation of Li diffusion in ionic conductors is of great interest, because suitable ionic conductors are needed for, e.g., the development of new secondary ion battery systems. As the standard tracer method is not applicable to study Li diffusion due to the lack of a suitable radioactive isotope, Li diffusion is alternatively probed by solid state NMR techniques. With the different NMR methods being available, diffusion processes can be studied on different length- and timescales. In the present paper we use two-time spin-alignment echo (SAE) NMR for the direct, i.e., model independent, measurement of extremely small translational Li jump rates. To this end, different crystalline and glassy ion conductors like LixTiS2, Li4SiO4 as well as LiNbO3 served as model substances to reveal the special features of this technique. SAE-NMR, which was originally developed for deuterons, has also been applied in a few cases to spin-3/2 nuclei, like 7Li, before. The corresponding correlation functions yield not only information about diffusion parameters but also about geometric properties of the diffusion pathways, making SAE-NMR a powerful method which complements well-established NMR techniques.
KW - Extremely slow motions
KW - Li diffusion
KW - Solid state NMR
KW - Spin-alignment echoes
UR - http://www.scopus.com/inward/record.url?scp=33750962668&partnerID=8YFLogxK
U2 - 10.1016/j.ssi.2006.07.037
DO - 10.1016/j.ssi.2006.07.037
M3 - Article
AN - SCOPUS:33750962668
VL - 177
SP - 3031
EP - 3036
JO - SOLID STATE IONICS
JF - SOLID STATE IONICS
SN - 0167-2738
IS - 35-36
ER -