Synthesis and Thermodynamic Investigation of Energy Materials in the Ag–Te–Cl System by the Solid-State Galvanic Cells

Mykola Moroz*, Fiseha Tesfaye, Pavlo Demchenko, Myroslava Prokhorenko, Serhiy Prokhorenko, Daniel Lindberg, Oleksandr Reshetnyak, Leena Hupa

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Discoveries of new energy materials with unique properties and wider thermal stability ranges enable sustainable developments toward a low-carbon society. In this work, phase stabilities and thermodynamic properties of selected compounds in the Ag-Te-Cl system with potential application as energy materials have been critically reviewed and experimentally investigated. Based on the literature data on phase formations in the AgCl-Ag2Te-Te part of the Ag-Te-Cl system and the results of electromotive force (EMF) measurements in this work, formations of the Ag19Te6Cl7, Ag10Te4Cl3, Ag5Te2Cl, and Ag23Te12Cl compounds below 500 K were established. The EMF measurements were performed in carefully built galvanic cells with positive electrodes prepared from finely ground mixtures of pure substances Ag, Te, and AgCl. Based on the temperature dependences of the EMF of the cells, the standard thermodynamic quantities of the ternary compounds of the Ag-Te-Cl system were experimentally determined for the first time.
Original languageEnglish
Number of pages15
JournalJOM Journal of the Minerals, Metals and Materials Society
Volume73
Issue number5
DOIs
Publication statusPublished - 17 Mar 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • Thermoelectric Materials
  • solid-state synthesis
  • ionic conductivity
  • electromotive force method
  • thermodynamic properties

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