The Effect of MgO‐MgF2 Synthesis Method on the Electrolyte Binding Ability in Thermal Batteries. Issue 1 (3rd January 2018)

• Record Type: Journal Article
• Authors: Zieliński, Michał; Czajka, Bogdan; Pietrowski, Mariusz; Kiderys, Angelika; Tomska‐Foralewska, Iwona; Przystajko, Wiesław; Wojciechowska, Maria
• Is Part Of: ChemistrySelect. Volume 3:Issue 1(2018)
• Page Start: 294
• Page End: 296
• Publication Date: 2018-01-03
• Subjects: high temperature cell -- magnesium fluoride -- MgF2-MgO immobilizing agent -- reserve batteries -- sol-gel method; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201700894
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: This paper describes a comparative study of synthesis (sol‐gel and suspension methods) of MgF2 ‐MgO material used as an immobilizing agent of the electrolyte (KCl‐LiCl‐RbCl) for high temperature cells. Samples containing 20 mol.% MgF2 obtained by the sol‐gel method, followed by calcination at 500 and 600 o C, were characterized by large specific surface areas greater than those of samples obtained by the suspension method. It was demonstrated that pellets containing 40 wt.% immobilizing agent composed of 20 mol.% MgF2 – 80 mol.% MgO, obtained by the sol‐gel method, and calcinated at 500 °C, were good electrolyte immobilizers. This mixture remains dimensionally stable at 400 °C and under 60 kPa pressure (no leakage of the electrolyte was observed) and reveals good ionic conductivity during tests in a model cell ‐ the voltage was not less than 1.0 V and current more than 0.75 A for approximately 400 s. Abstract : A mixed MgF2 ‐MgO system has been tested as an immobilizing agent of the electrolyte (KCl‐LiCl‐RbCl) for high temperature cells. The addition of MgF2 to MgO significantly improves the textural and mechanical properties of the immobilizing agent and ensures longer and more stable work of high temperature cells.