2022
DOI: 10.1007/s10853-021-06773-6
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Conductivity, microstructure and mechanical properties of tape-cast LATP with LiF and SiO2 additives

Abstract: LATP sheets with LiF and SiO2 addition prepared by tape cast as electrolytes for solid-state batteries were characterized regarding conductivity, microstructure and mechanical properties aiming toward an optimized composition. The use of additives permitted a reduction of the sintering temperature. Rietveld analyses of the samples with additives revealed a phase mixture of NaSICON modifications crystallizing with rhombohedral and orthorhombic symmetry as a superstructure with space group Pbca. It seems that Li… Show more

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Cited by 16 publications
(7 citation statements)
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“…Careful analysis of the crystal structure of LATP showed that it was completely converted to the orthorhombic modification after sintering under Ar in all samples (with and without LWO). The conversion to the orthorhombic phase was previously reported for LATP sintered in a reducing atmosphere in the presence of carbon and an excess of Li 2 O. Therefore, the best agreement with the observed XRD pattern was obtained with a mixture of olivine-type LFP ( Pnma , ICSD no. 15445), orthorhombic LATP (Pbna, ICSD no.…”
Section: Results and Discussionsupporting
confidence: 79%
“…Careful analysis of the crystal structure of LATP showed that it was completely converted to the orthorhombic modification after sintering under Ar in all samples (with and without LWO). The conversion to the orthorhombic phase was previously reported for LATP sintered in a reducing atmosphere in the presence of carbon and an excess of Li 2 O. Therefore, the best agreement with the observed XRD pattern was obtained with a mixture of olivine-type LFP ( Pnma , ICSD no. 15445), orthorhombic LATP (Pbna, ICSD no.…”
Section: Results and Discussionsupporting
confidence: 79%
“…Attention needs to be paid that the used intermediate LATP powders in our work were prepared with an excess of Li by 10 wt%, which implies the formation of Al-and Li-rich orthorhombic NASICON-like Pbna phase could be attributed to the synergic effects of Al 3+ inhomogeneous distribution and Li-excess. [30,50] As both LATP phases contain similar elements but are only different in stoichiometry, we name the NASICON-type rhombohedral and orthorhombic phases as r-LATP and o-LATP, respectively. Unlike LATP, LFP maintains the structural integrity after sintering in Ar, evidenced by the monophase composition (ICSD code: 97764) and the nearly unchanged lattice parameters compared with those of the literature data (Figure S2a and Table S1, Supporting Information).…”
Section: Structural Properties Of Lfp Latp and Co-fired Lfp/latp Samplesmentioning
confidence: 99%
“…A small amount of LATP (4 wt% for LATP-c and 5 wt% for LATP-e) crystallizes in the orthorhombic phase structure (space group Pbca , structure similar to that of Li 2 Mn 2 (SO 4 ) 3 type, ICSD 51332, indicated by asterisks (*) in Fig. 3d) first reported by Gross et al 6 and observed in virtually all reported LATP materials. While the occurrence of this orthorhombic LATP has been associated with sintering temperature, its effect on the electrochemical stability and ionic conductivity is still unclear.…”
Section: Resultsmentioning
confidence: 66%