Solid State Ionics, volume 393, pages 116174
Structural and electrical studies of B3+-and-In3+-ion co-doped Li1.3Al0.3Ti1.7(PO4)3 solid electrolytes
Publication type: Journal Article
Publication date: 2023-05-01
General Chemistry
Condensed Matter Physics
General Materials Science
Abstract
In this study, B3+ and In3+ ions were co-doped at the Al3+ sites of Li1.3Al0.3Ti1.7(PO4)3 electrolyte using a solid-state reaction with the goal of obtaining electrolytes with remarkable Li-ion conductivities. B3+-ion doping enhanced the densification of Li1.3Al0.3-yByTi1.7(PO4)3 electrolytes, and Li1.3Al0.22B0.08Ti1.7(PO4)3 electrolyte delivered the highest relative density of 97.6%. Subsequent In3+-ion doping further enhanced densification, and Li1.3Al0.21B0.08In0.01Ti1.7(PO4)3 electrolyte delivered the highest relative density of 98.2%. However, the electrolyte densification diminished rapidly upon further increasing the In3+-ion content. The peaks in the X-ray diffraction patterns of the Li1.3Al0.3-yByTi1.7(PO4)3 and Li1.3Al0.22-xB0.08InxTi1.7(PO4)3 electrolytes were indexed to rhombohedral NASICON-type LiTi2(PO4)3 with the space group R3¯c with trace amounts of LiTiPO5 secondary phase. Upon incorporating In3+ ions into the lattice of Li1.3Al0.3Ti1.7(PO4)3 solid electrolyte, the cell volume and the transport channels for Li+ ions were expanded, while B3+-ion incorporation slightly contracted the cell. The scanning electron microscopy and Raman spectroscopy results indicated that B3+-ion substitution into the Li1.3Al0.3Ti1.7(PO4)3 lattice to obtain Li1.3Al0.3-yByTi1.7(PO4)3 electrolytes, which led to the increase in the structural order of the lattices and promoted the formation of microstructures with superior crystallinity and smaller and more uniform grain sizes. Further, B3+ and In3+-ions co-doped Li1.3Al0.22-xB0.08InxTi1.7(PO4)3 electrolytes showed lower structural order, larger grain size, lower grain-size uniformity, and more pore contents than those of undoped Li1.3Al0.3Ti1.7(PO4). The ionic conductivities of the Li1.3Al0.3-yByTi1.7(PO4)3 electrolytes increased with increasing concentration of B3+-ion dopant and reached a maximum of 8.35× 10−4 S/cm for Li1.3Al0.22B0.08Ti1.7(PO4)3. Among the Li1.3Al0.22-xB0.08InxTi1.7(PO4)3 electrolytes, Li1.3Al0.21B0.08In0.01Ti1.7(PO4)3 presented the highest ionic conductivity of 1.08 × 10−3 S/cm, which was closely correlated to its high relative density. The contribution of electronic conductivity to total conductivity was found to be trivial.
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Wang S. et al. Structural and electrical studies of B3+-and-In3+-ion co-doped Li1.3Al0.3Ti1.7(PO4)3 solid electrolytes // Solid State Ionics. 2023. Vol. 393. p. 116174.
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Wang S., Shieh D., Ko Y., Hsu Y., Wu M. Structural and electrical studies of B3+-and-In3+-ion co-doped Li1.3Al0.3Ti1.7(PO4)3 solid electrolytes // Solid State Ionics. 2023. Vol. 393. p. 116174.
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TY - JOUR
DO - 10.1016/j.ssi.2023.116174
UR - https://doi.org/10.1016/j.ssi.2023.116174
TI - Structural and electrical studies of B3+-and-In3+-ion co-doped Li1.3Al0.3Ti1.7(PO4)3 solid electrolytes
T2 - Solid State Ionics
AU - Wang, Sea-Fue
AU - Shieh, Derrick
AU - Ko, Yi-An
AU - Hsu, Yung-Fu
AU - Wu, Mingxuan
PY - 2023
DA - 2023/05/01 00:00:00
PB - Elsevier
SP - 116174
VL - 393
SN - 0167-2738
ER -
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@article{2023_Wang,
author = {Sea-Fue Wang and Derrick Shieh and Yi-An Ko and Yung-Fu Hsu and Mingxuan Wu},
title = {Structural and electrical studies of B3+-and-In3+-ion co-doped Li1.3Al0.3Ti1.7(PO4)3 solid electrolytes},
journal = {Solid State Ionics},
year = {2023},
volume = {393},
publisher = {Elsevier},
month = {may},
url = {https://doi.org/10.1016/j.ssi.2023.116174},
pages = {116174},
doi = {10.1016/j.ssi.2023.116174}
}
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