TY  - JOUR
AU  - Moradipour, Fariba
AU  - Markert, Andreas
AU  - Rudszuck, Thomas
AU  - Röttgen, Niklas
AU  - Dück, Gerald
AU  - Finsterbusch, Martin
AU  - Gerbig, Felix
AU  - Nirschl, Hermann
AU  - Guthausen, Gisela
PY  - 2023
DA  - 2023/11/02
TI  - Na<sup>+</sup> Mobility in PEO-Based Composite Solid-State Electrolytes by NMR
JO  - Journal of Energy and Power Technology
SP  - 032
VL  - 05
IS  - 04
AB  - Charge transfer and mobility are essential for electrochemical processes in batteries, which need to be understood in detail for optimization, especially in the case of all-solid-state batteries. Wide line NMR is well-known in solid-state NMR and allows the quantification of ion mobility in ordered crystalline and amorphous structures. Temperature-dependent 23Na-NMR is sensitive to ion mobility via longitudinal relaxation, but also via line analysis and transverse relaxation. As 23Na is a spin 3/2 nucleus, 23Na-NMR is also susceptible to electric field gradients caused by their nearest neighbor environment and, therefore, reflects not only the mobility of 23Na+ but also the molecular dynamics in the neighborhood, which are investigated in this paper. The named NMR methods were explored to study 23Na+ mobility in the solid electrolytes NaSICON (sodium (Na) Super Ionic CONductor, here Na3.4Zr2Si2.4P0.6O12), the salt NaTFSI (sodium bis(trifluoromethyl sulfonyl)imide), as well as in the polymer-based electrolytes PEO-NaSICON, PEO-NaTFSI, and PEO-NaTFSI-NaSICON.
SN  - 2690-1692
UR  - https://doi.org/10.21926/jept.2304032
DO  - 10.21926/jept.2304032
ID  - Moradipour2023
ER  -