Solid-state sintering at high temperatures is commonly used to densify solid electrolytes. Yet, optimizing phase purity, structure, and grain sizes of solid electrolytes is challenging due to the lack of understanding of relevant processes during sintering. Here, we use an environmental scanning electron microscopy (ESEM) to monitor the sintering behavior of NASICON-type LiAlTi(PO) (LATP) at low environmental pressures. Our results show that while no major morphological changes are observed at 10 Pa and only coarsening is induced at 10 Pa, environmental pressures of 300 and 750 Pa lead to the formation of typically sintered LATP electrolytes. Furthermore, the use of pressure as an additional parameter in sintering allows the grain size and shape of electrolyte particles to be controlled.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9983001 | PMC |
| http://dx.doi.org/10.1021/acs.cgd.2c01098 | DOI Listing |
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