scholarly journals The Se2 (GAS) fugacity in systems with noble metals: chrisstanleyite Ag2Pd3Se4-naumannite Ag2Se-β-PdSe2 and luberoite Pt5Se4-sudovikovite PtSe2

2019 ◽  
Vol 485 (6) ◽  
pp. 720-725
Author(s):  
A. V. Kristavchuk ◽  
A. Vymazalova ◽  
E. G. Osadchii ◽  
I. V. Vikentyev ◽  
D. A. Chareev ◽  
...  
Keyword(s):  
Solid State ◽  
Solid Electrolyte ◽  
Atmospheric Pressure ◽  
Low Temperatures ◽  
Noble Metals ◽  
Galvanic Cell ◽  
Emf Method ◽  
Temperature Ranges ◽  
Ion Conducting ◽  
Gas Space

The reactions of 6Ag(cr) + 3PdSe2(cr) = 2Ag2Se(cr) + Ag2Pd3Se4(cr) and 12Ag(cr) + 5PtSe2(cr) = 6Ag2Se(cr) + Pt5Se4(cr) were studied with the EMF method in a completely solid-state galvanic cell with an Ag ion-conducting solid electrolyte with overall gas space (Ar under atmospheric pressure). The EMF vs T dependencies were obtained in the temperature ranges of Т = 425-648 K and 501-713 K, respectively. Then, they were recalculated for gaseous Se fugacity in dependence on the temperature for non-variant equilibriums of Ag2Pd3Se4 (chrisstanleyite)-β-PdSe2 (the phase, which transforms into verbeekite under low temperatures)-Ag2Se (naumannite) and Pt5Se4 (luberoite)-PtSe2 (sudovikovite): logfSe2(gas)(Ag2Pd3Se4/Ag2Se/PdSe2) = 7.71 ± 0.05 - 8.524 ± 0.026(1000/T), logfSe2(gas)(Pt5Se4/PtSe2) = 7.135 ± 0.027 - 12.274 ± 0.016(1000/T).

Potentiometric Oxygen Sensor with Solid State Reference Electrode

2014 ◽  
Vol 21 (2) ◽  
pp. 205-216 ◽  
Author(s):  
Katarzyna Dunst ◽  
Grzegorz Jasinski ◽  
Piotr Jasinski
Keyword(s):  
Solid State ◽  
Nickel Oxide ◽  
Solid Electrolyte ◽  
Oxygen Sensor ◽  
Reference Electrode ◽  
Oxide Mixture ◽  
Oxygen Ion ◽  
State Reference ◽  
Ion Conducting ◽  
Two Sides

Abstract The concentration or the partial pressure of oxygen in an environment can be determined using different measuring principles. For high temperature measurements of oxygen, ceramic-based sensors are the most practical. They are simple in construction, exploration and maintenance. A typical oxygen potentiometric sensor consists of an oxygen ion conducting solid electrolyte and two electrodes deposited on the two sides of the electrolyte. In this paper different structures of potentiometric oxygen sensors with a solid state reference electrode were fabricated and investigated. The fabricated structures consisted of oxygen ion conducting solid electrolyte from yttria stabilized zirconia, a sensing platinum electrode and nickel-nickel oxide reference electrode. The mixture of nickel-nickel oxide was selected as the reference electrode because it provides reliable electrochemical potential in contact with oxygen conducting electrolyte. To avoid oxidation of nickel the reference electrode is sealed from ambient and the mixture of nickel-nickel oxide was formed electrochemically from nickel oxide after sealing. The effectiveness of the sealing quality and the effectiveness of nickel-nickel oxide mixture formation was investigated by impedance spectroscopy.

Evaluation of Binary System (NaI-Na3PO4) Solid Electrolyte and Performance of Sodium Battery

2014 ◽  
Vol 703 ◽  
pp. 33-40
Author(s):  
N. Hassan ◽  
A. Sanusi ◽  
Azizah Hanom Ahmad
Keyword(s):  
Solid State ◽  
Solid Electrolyte ◽  
Transference Number ◽  
Electrical Impedance Spectroscopy ◽  
Ionic Transference Number ◽  
Sodium Battery ◽  
Maximum Conductivity ◽  
Impedance Spectroscopy Technique ◽  
Ion Conducting ◽  
And Performance

A Na–ion conducting solid electrolyte system was prepared by using ball milling and sintering method. The electrical conductivity study was carried out as a function of NaI concentration by Electrical Impedance Spectroscopy technique and the maximum conductivity of (1.02±0.19)×10-4S cm−1at room temperature was obtained for the composition 0.50 NaI:0.50 Na3PO4. Further characterization was performed by using and Infrared (FTIR) technique. From FTIR spectra, the variation in the peak intensity and shifting is observed due to the presence of P–O and PO43−bands that had been shifted indicating changes in polyhedral structure which in turn led to the formation of conducting channel by corner sharing or through edges. The ionic transference number was found in the value of 0.92 which suggests that ions are the charge carriers. The optimum composition with the highest conductivity of the sample considered as a good candidate to be used as solid electrolyte in solid state sodium battery. The sodium battery with configuration: Na/NaI–Na3PO4/V2O4was tested by the discharged characteristic at a current of 1.0 μA. The solid state sodium batteries exhibited a discharge capacity of 144mAh/g.

Stabilizing a high-voltage LiNi0.5Mn1.5O4 cathode towards all solid state batteries: a Li–Al–Ti–P–O solid electrolyte nano-shell with a host material

Nanoscale ◽  
2019 ◽  
Vol 11 (18) ◽  
pp. 8967-8977 ◽  
Author(s):  
Li Li ◽  
Rui Zhao ◽  
Tinghua Xu ◽  
Dandan Wang ◽  
Du Pan ◽  
...  
Keyword(s):  
Solid State ◽  
Solid Electrolyte ◽  
High Voltage ◽  
Cathode Surface ◽  
Lithium Ion ◽  
Host Material ◽  
Kinetic Characteristics ◽  
Solid State Batteries ◽  
All Solid State Batteries ◽  
Ion Conducting

A lithium ion conducting modification shell is introduced onto the cathode surface, which realizes excellent kinetic characteristics.

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