期刊
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
卷 84, 期 2, 页码 368-374出版社
SPRINGER
DOI: 10.1007/s10971-017-4495-8
关键词
Sol-gel method; MgF2-MgO immobilizing agent; High-temperature cell; Thermal battery
A MgF2-MgO system was tested as an immobilizing agent for the electrolyte KCl-LiCl-RbCl in high temperature cells. Samples of MgF2-MgO with different contents of MgF2 (0-20 mol%) were prepared by one-step sol-gel method in the reaction of magnesium methoxide dissolved in methanol with aqueous solution of hydrofluoric acid. The immobilizing agents were characterized by X-ray powder diffraction, low-temperature nitrogen adsorption and thermogravimetric measurements. Dimensional stability, mechanical strength and unfilled spaces were characterized using pellets containing 40 wt% of immobilizing agents. Finally, the pellets were used in an electric cell at 400 A degrees C and the changes in current and voltage were recorded in time. The introduction of MgF2 to MgO in the synthesis by the sol-gel method significantly improves the textural and mechanical properties of immobilizing agent and ensures longer and more stable work of high temperature cell. [GRAPHICS] .
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