{"title":"Synthesis of α-LiAlO2 Powders with a Controlled Granulometric Composition for a Carbonate-Melt-Based Matrix Electrolyte","authors":"A. S. Tolkacheva, M. A. Konopel’ko","doi":"10.1134/S0036029524701386","DOIUrl":null,"url":null,"abstract":"<p><b>Abstract</b>—Three methods of synthesizing α-LiAlO<sub>2</sub> powders for the manufacture of a matrix electrolyte for a molten carbonate fuel cell are considered. A submicron fraction with a specific surface area of 79 m<sup>2</sup>/g is fabricated by spray pyrolysis from an aqueous solution, and coarse rod-shaped fractions with a particle length of up to 19 μm are synthesized from a halide melt and an aqueous solution. Ceramic matrices prepared by belt casting are tested in a single fuel cell filled with the 53Li<sub>2</sub>CO<sub>3</sub>–47Na<sub>2</sub>CO<sub>3</sub> melt as an electrolyte. The matrices showed good gas tightness: the nitrogen flow into an anode through the matrix does not exceed 0.6% during life tests for 1100 h, which included 15 thermal cycles with cooling of the fuel cell until the melt freezes.</p>","PeriodicalId":769,"journal":{"name":"Russian Metallurgy (Metally)","volume":"2024 1","pages":"72 - 78"},"PeriodicalIF":0.3000,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Metallurgy (Metally)","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S0036029524701386","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
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Abstract—Three methods of synthesizing α-LiAlO2 powders for the manufacture of a matrix electrolyte for a molten carbonate fuel cell are considered. A submicron fraction with a specific surface area of 79 m2/g is fabricated by spray pyrolysis from an aqueous solution, and coarse rod-shaped fractions with a particle length of up to 19 μm are synthesized from a halide melt and an aqueous solution. Ceramic matrices prepared by belt casting are tested in a single fuel cell filled with the 53Li2CO3–47Na2CO3 melt as an electrolyte. The matrices showed good gas tightness: the nitrogen flow into an anode through the matrix does not exceed 0.6% during life tests for 1100 h, which included 15 thermal cycles with cooling of the fuel cell until the melt freezes.
期刊介绍：
Russian Metallurgy (Metally) publishes results of original experimental and theoretical research in the form of reviews and regular articles devoted to topical problems of metallurgy, physical metallurgy, and treatment of ferrous, nonferrous, rare, and other metals and alloys, intermetallic compounds, and metallic composite materials. The journal focuses on physicochemical properties of metallurgical materials (ores, slags, matters, and melts of metals and alloys); physicochemical processes (thermodynamics and kinetics of pyrometallurgical, hydrometallurgical, electrochemical, and other processes); theoretical metallurgy; metal forming; thermoplastic and thermochemical treatment; computation and experimental determination of phase diagrams and thermokinetic diagrams; mechanisms and kinetics of phase transitions in metallic materials; relations between the chemical composition, phase and structural states of materials and their physicochemical and service properties; interaction between metallic materials and external media; and effects of radiation on these materials.
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