{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,16]],"date-time":"2026-10-16T07:13:09Z","timestamp":1792134789851,"version":"4.4.0"},"reference-count":88,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2024,7,30]],"date-time":"2024-07-30T00:00:00Z","timestamp":1722297600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Federal Ministry of Education and Research of Germany","award":["03XPO273B (FestBatt)"],"award-info":[{"award-number":["03XPO273B (FestBatt)"]}]},{"name":"Federal Ministry of Education and Research of Germany","award":["FestBatt2 (FB-2 Hybrid) 03XPO428B"],"award-info":[{"award-number":["FestBatt2 (FB-2 Hybrid) 03XPO428B"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>Since solid electrolytes have a broad electrochemical stability window, are exceptionally electrochemically stable against Li metal, and function as a physical separator to prevent dendrite growth, they are at the forefront of alternate possibilities, further increasing the stability and energy density of Li-ion batteries. NASICON-type electrolytes are a promising candidate due to their negligible moisture sensitivity, which results in outstanding stability and a lower probability of Li2CO3 passivity under the ambient atmosphere. However, one of the most promising representatives, Li1+xYxZr2\u2212x(PO4)3 (LYZP), has multiple stable phases with significant variation in their corresponding Li-ion conductivity. In this paper, we have successfully synthesized the highly ionically conductive rhombohedral phase of LYZP via spray-flame synthesis. Two different solvent mixtures (e.g., 2-ethyl hexanoic acid\/ethanol, propanol\/propanoic acid) were chosen to explore the effect of precursor composition and combustion enthalpy on the phase composition of the nanoparticle. The as-synthesized nanoparticles from spray-flame synthesis consisted of the crystalline tetragonal zirconia (t-ZrO2) phase, while lithium, yttrium, and phosphate were present on the nanoparticles\u2019 surface as amorphous phases. However, a short annealing step (1 h) was sufficient to obtain the NASICON phase. Moreover, we have shown the gradual phase conversion from orthorhombic \u03b2 phase to rhombohedral \u03b1 phase as the annealing temperature increased from 700 \u00b0C to 1300 \u00b0C (complete removal of \u03b2 phase). In this context, Y3+ doping was also crucial, along with the appropriate solvent mixture and annealing temperature, for obtaining the much-desired rhombohedral \u03b1 phase. Further, 0.2 at% Y3+ doping was added to the solvent mixture of 2-ethyl hexanoic acid\/ethanol, and annealing at 1300 \u00b0C for 1 h resulted in a high ionic conductivity of 1.14\u221910\u22125 S cm\u22121.<\/jats:p>","DOI":"10.3390\/nano14151278","type":"journal-article","created":{"date-parts":[[2024,7,30]],"date-time":"2024-07-30T11:02:27Z","timestamp":1722337347000},"page":"1278","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Spray-Flame Synthesis of NASICON-Type Rhombohedral (\u03b1) Li1+xYxZr2\u2212x(PO4)3 [x = 0\u20130.2] Solid Electrolytes"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6581-576X","authenticated-orcid":false,"given":"Md Yusuf","family":"Ali","sequence":"first","affiliation":[{"name":"Institute for Energy and Materials Processes\u2014Reactive Fluids, University of Duisburg-Essen, 47057 Duisburg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-3820-5777","authenticated-orcid":false,"given":"Tianyu","family":"Chen","sequence":"additional","affiliation":[{"name":"Institute for Energy and Materials Processes\u2014Reactive Fluids, University of Duisburg-Essen, 47057 Duisburg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hans","family":"Orthner","sequence":"additional","affiliation":[{"name":"Institute for Energy and Materials Processes\u2014Reactive Fluids, University of Duisburg-Essen, 47057 Duisburg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8487-9937","authenticated-orcid":false,"given":"Hartmut","family":"Wiggers","sequence":"additional","affiliation":[{"name":"Institute for Energy and Materials Processes\u2014Reactive Fluids, University of Duisburg-Essen, 47057 Duisburg, Germany"},{"name":"CENIDE, Center for Nanointegration Duisburg-Essen, 47057 Duisburg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,7,30]]},"reference":[{"key":"ref_1","first-page":"55","article-title":"Financial instability and oil price fluctuations: Evidence from oil exporting developing countries","volume":"17","author":"Gaies","year":"2020","journal-title":"Eur. 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