The fast silver ion conducting solid-state electrolytes for deriving thermodynamic data

A3 Bokavsnitt, kapitel i forskningsböcker


Interna författare/redaktörer


Publikationens författare: Fiseha Tesfaye, Mykola Moroz, Oleksandr Reshetnyak, Daniel Lindberg, Pekka Taskinen, Leena Hupa
Redaktörer: Aamir Shahzad
Förlagsort: London
Publiceringsår: 2019
Förläggare: InTechOpen
Moderpublikationens namn: Thermophysical Properties of Complex Materials
Seriens namn: IntechOpen
Artikelns första sida, sidnummer: 1
Artikelns sista sida, sidnummer: 19
ISBN: 978-1-78984-889-2


Abstrakt

The electromotive force (EMF) method was described
and some characteristic examples from the past and recent literature were reviewed.
The important experimental procedures for a successful measurement of an EMF of
different galvanic cells at a certain temperature and determination of the
thermodynamic properties of chemical compounds from the obtained EMF values
were described. A typical galvanic cell arrangement in a furnace was presented.
The two most common types of AgI-based solid electrolytes, AgI and RbAg4I5,
were discussed in detail. The ionic conduction mechanisms and the application
of the solid electrolytes in the EMF cells were described. In this work, we
have also conducted EMF measurements using the fast Ag+ ion conducting
solid-state electrolyte. The solid-state electrolyte Ag3GeS3I glass and the
cathode material Ag4HgSe2I2 were synthesized and electrochemical cell (-)graphite | Ag | Ag3GeS3I
glass | Ag4HgSe2I2 | graphite(+) was assembled to measure the activity of Ag in the
quaternary phase. The extremely low values of activity of silver in Ag4HgSe2I2
in the temperature range 412–482 K indicate that Ag4HgSe2I2 has superionic property. The obtained results and the determined thermodynamic values are
presented and discussed.


Nyckelord

Electrochemistry, Gibbs energy, Materials science, Metallurgical Thermodynamics, Metallurgical Thermodynamics and Modelling, silver ion, Thermodynamics

Senast uppdaterad 2019-22-11 vid 02:56