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A new electrolyte based on Tm3+-doped delta-Bi2O3-type phase with enhanced conductivity

Authorized Users Only
2015
Authors
Dapčević, Aleksandra
Poleti, Dejan
Rogan, Jelena
Radojković, Aleksandar
Radović, M.
Branković, Goran
Article (Published version)
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Abstract
The possibility to stabilize the delta-Bi2O3-type polymorph with high ionic conductivity by doping with Tm2O3 was investigated in this study. Five microaystalline samples were synthesized at 750 degrees C from alpha-Bi2O3 and Tm2O3 mixtures with compositions (Bi1-xTmx)(2)O-3, where x = 0.04, 0.08, 0.11, 0.14 and 0.20. The XRD, SEM, HRTEM and SAED results showed that the targeted delta-Bi2O3-type single-phase (space group Fm (3) over barm) was formed for 0.11 lt = x lt = 0.20. The unit cell parameter of delta-Bi2O3-type phase decreases with increase in Tm content. According to DTA, no phase transitions were observed in the sample with x = 020, indicating that the obtained delta-Bi2O3-type phase is structurally stable from room temperature to 985 degrees C. Based on EIS, (Bi0.80Tm0.20)(2)O-3 exhibits high conductivity (0.117 S cm(-1) at 550 degrees C) with activation energies: 0.38(4) eV above 550 degrees C and 127(2) eV below 550 degrees C, due to the change in charge carrier mobility.... The effect of thermal aging was investigated and discussed.

Keywords:
Solid oxide fuel cell / Electrolyte / Oxide ion conductor / Stability / delta-Bi2O3-type phase
Source:
Solid State Ionics, 2015, 280, 18-23
Publisher:
  • Elsevier Science Bv, Amsterdam
Funding / projects:
  • Zero- to Three-Dimensional Nanostructures for Application in Electronics and Renewable Energy Sources: Synthesis, Characterization and Processing (RS-45007)
  • U.S. National Science FoundationNational Science Foundation (NSF) [DMR-1057155]

DOI: 10.1016/j.ssi.2015.08.004

ISSN: 0167-2738

WoS: 000362605500003

Scopus: 2-s2.0-84940471546
[ Google Scholar ]
35
18
URI
http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3135
Collections
  • Radovi istraživača / Researchers’ publications (TMF)
Institution/Community
Tehnološko-metalurški fakultet
TY  - JOUR
AU  - Dapčević, Aleksandra
AU  - Poleti, Dejan
AU  - Rogan, Jelena
AU  - Radojković, Aleksandar
AU  - Radović, M.
AU  - Branković, Goran
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3135
AB  - The possibility to stabilize the delta-Bi2O3-type polymorph with high ionic conductivity by doping with Tm2O3 was investigated in this study. Five microaystalline samples were synthesized at 750 degrees C from alpha-Bi2O3 and Tm2O3 mixtures with compositions (Bi1-xTmx)(2)O-3, where x = 0.04, 0.08, 0.11, 0.14 and 0.20. The XRD, SEM, HRTEM and SAED results showed that the targeted delta-Bi2O3-type single-phase (space group Fm (3) over barm) was formed for 0.11  lt = x  lt = 0.20. The unit cell parameter of delta-Bi2O3-type phase decreases with increase in Tm content. According to DTA, no phase transitions were observed in the sample with x = 020, indicating that the obtained delta-Bi2O3-type phase is structurally stable from room temperature to 985 degrees C. Based on EIS, (Bi0.80Tm0.20)(2)O-3 exhibits high conductivity (0.117 S cm(-1) at 550 degrees C) with activation energies: 0.38(4) eV above 550 degrees C and 127(2) eV below 550 degrees C, due to the change in charge carrier mobility. The effect of thermal aging was investigated and discussed.
PB  - Elsevier Science Bv, Amsterdam
T2  - Solid State Ionics
T1  - A new electrolyte based on Tm3+-doped delta-Bi2O3-type phase with enhanced conductivity
EP  - 23
SP  - 18
VL  - 280
DO  - 10.1016/j.ssi.2015.08.004
ER  - 
@article{
author = "Dapčević, Aleksandra and Poleti, Dejan and Rogan, Jelena and Radojković, Aleksandar and Radović, M. and Branković, Goran",
year = "2015",
abstract = "The possibility to stabilize the delta-Bi2O3-type polymorph with high ionic conductivity by doping with Tm2O3 was investigated in this study. Five microaystalline samples were synthesized at 750 degrees C from alpha-Bi2O3 and Tm2O3 mixtures with compositions (Bi1-xTmx)(2)O-3, where x = 0.04, 0.08, 0.11, 0.14 and 0.20. The XRD, SEM, HRTEM and SAED results showed that the targeted delta-Bi2O3-type single-phase (space group Fm (3) over barm) was formed for 0.11  lt = x  lt = 0.20. The unit cell parameter of delta-Bi2O3-type phase decreases with increase in Tm content. According to DTA, no phase transitions were observed in the sample with x = 020, indicating that the obtained delta-Bi2O3-type phase is structurally stable from room temperature to 985 degrees C. Based on EIS, (Bi0.80Tm0.20)(2)O-3 exhibits high conductivity (0.117 S cm(-1) at 550 degrees C) with activation energies: 0.38(4) eV above 550 degrees C and 127(2) eV below 550 degrees C, due to the change in charge carrier mobility. The effect of thermal aging was investigated and discussed.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Solid State Ionics",
title = "A new electrolyte based on Tm3+-doped delta-Bi2O3-type phase with enhanced conductivity",
pages = "23-18",
volume = "280",
doi = "10.1016/j.ssi.2015.08.004"
}
Dapčević, A., Poleti, D., Rogan, J., Radojković, A., Radović, M.,& Branković, G.. (2015). A new electrolyte based on Tm3+-doped delta-Bi2O3-type phase with enhanced conductivity. in Solid State Ionics
Elsevier Science Bv, Amsterdam., 280, 18-23.
https://doi.org/10.1016/j.ssi.2015.08.004
Dapčević A, Poleti D, Rogan J, Radojković A, Radović M, Branković G. A new electrolyte based on Tm3+-doped delta-Bi2O3-type phase with enhanced conductivity. in Solid State Ionics. 2015;280:18-23.
doi:10.1016/j.ssi.2015.08.004 .
Dapčević, Aleksandra, Poleti, Dejan, Rogan, Jelena, Radojković, Aleksandar, Radović, M., Branković, Goran, "A new electrolyte based on Tm3+-doped delta-Bi2O3-type phase with enhanced conductivity" in Solid State Ionics, 280 (2015):18-23,
https://doi.org/10.1016/j.ssi.2015.08.004 . .

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