TY  - JOUR
AU  - Taoussi, S.
AU  - Ouaha, A.
AU  - Naji, M.
AU  - Hoummada, K.
AU  - Lahmar, A.
AU  - Alami, J.
AU  - Manoun, B.
AU  - El bouari, A.
AU  - Frielinghaus, H.
AU  - Bih, L.
TI  - Next-generation Li1.3+xAl0.3AsxTi1.7-x(PO4)3 NASICON electrolytes with outstanding ionic conductivity performance
JO  - Journal of power sources
VL  - 644
SN  - 0378-7753
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2025-02402
SP  - 237103
PY  - 2025
AB  - NASICON-type solid electrolytes feature prominently in the improved safety and energy density of solid-state lithium batteries (ASSLBs). Achieving high ionic conductivity in these electrolytes is key to optimizing their performance. In this study, we introduced a new class of NASICON-type materials by doping arsenic into the Li1.3Al0.3Ti1.7(PO4)3 framework, creating a series of Li1.3+xAl0.3AsxTi1.7-x(PO4)3 phases with varying arsenic content (x = 0, 0.1, 0.2, 0.3), synthesized using the standard solid-state reaction method. X-ray diffraction confirmed the successful formation of the Li1.3+xAl0.3AsxTi1.7-x(PO4)3 phases, which was further validated by Rietveld refinement. Structural analyses through FT-IR, Raman spectroscopy, NMR, and ICP-AES studies validate the effective incorporation of arsenic into the lattice. Among the different compositions, Li1.5As0.2Al0.3Ti1.5(PO4)3 phase stood out due to its high relative density of 89% and its pore-free microstructure, as observed through scanning electron microscopy results, revealing the largest grain and crystallite size. Notably, doping with arsenic resulted in a significant enhancement in ionic conductivity, increasing from 5.34×10-5 Ω-1.cm-1 for Li1.3Al0.3Ti1.7(PO4)3 to 8.57×10-4 Ω-1.cm-1 for the Li1.5As0.2Al0.3Ti1.5(PO4)3 at 25°C. With a lithium transference number of 0.99, and a conduction mechanism largely unaffected by changes in temperature or composition, demonstrating its suitability as a promising candidate for solid electrolyte applications.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001478616300001
DO  - DOI:10.1016/j.jpowsour.2025.237103
UR  - https://juser.fz-juelich.de/record/1041722
ER  -