TY  - CONF
AU  - Malešević, Aleksandar
AU  - Radojković, Aleksandar
AU  - Žunić, Milan
AU  - Dapčević, Aleksandra
AU  - Perać, Sanja
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2212
AB  - Mixed oxides with the perovskite structure are known for their proton conducting ability at the temperatures above 500 °C. This characteristic makes them suitable for application as an electrolyte for intermediate-temperature solid oxide fuel cells. Doping of BaCeO3 with In3+ in place of Ce4+ leads to emergence of oxygen vacancies which take part in creation of proton defects. The characteristics of the BaCe1-xInxO3-δ were investigated in a wide range of In dopant concentrations (x = 0.05; 0.10; 0.15; 0.20; 0.25; 0.30; 0.35 and 0.40). All the samples were synthesized by a citric-nitric autocombustion method. The dense electrolytes were formed after sintering at 1300 °C for 5 h in air. X-ray powder diffraction analysis showed that powders with In content greater than 25 mol% contained In2O3 as a secondary phase. The highest total conductivity around 5×10–3 S•cm–1 was measured for the sample BaCe0.75In0.25O3-δ in the wet hydrogen atmosphere at 700 °C. After exposure to pure CO2 atmosphere at 700 °C for 5 h, the samples were investigated by X-ray diffraction analysis. It was found that even 15 mol% In could completely suppress degradation of the electrolyte. Ni-
BaCe0.75In0.25O3-δ/BaCe0.75In0.25O3-δ/LSCF-BaCe0.75In0.25O3-δ fuel cell was tested in wet hydrogen atmosphere and power density output of 264 mW•cm–2 was measured at 700 °C. This result is an indication of stability and functionality of this electrolyte and its versatility in respect to type of fuel and performing environment.
PB  - Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia
C3  - 6th Conference of the Serbian Society for Ceramic Materials
T1  - Stability and functionality of BaCe1-xInxO3-δ as a high temperature proton conducting electrolyte for solid oxide fuel cells
SP  - 57
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2212
ER  - 

@conference{
author = "Malešević, Aleksandar and Radojković, Aleksandar and Žunić, Milan and Dapčević, Aleksandra and Perać, Sanja and Branković, Zorica and Branković, Goran",
year = "2022",
abstract = "Mixed oxides with the perovskite structure are known for their proton conducting ability at the temperatures above 500 °C. This characteristic makes them suitable for application as an electrolyte for intermediate-temperature solid oxide fuel cells. Doping of BaCeO3 with In3+ in place of Ce4+ leads to emergence of oxygen vacancies which take part in creation of proton defects. The characteristics of the BaCe1-xInxO3-δ were investigated in a wide range of In dopant concentrations (x = 0.05; 0.10; 0.15; 0.20; 0.25; 0.30; 0.35 and 0.40). All the samples were synthesized by a citric-nitric autocombustion method. The dense electrolytes were formed after sintering at 1300 °C for 5 h in air. X-ray powder diffraction analysis showed that powders with In content greater than 25 mol% contained In2O3 as a secondary phase. The highest total conductivity around 5×10–3 S•cm–1 was measured for the sample BaCe0.75In0.25O3-δ in the wet hydrogen atmosphere at 700 °C. After exposure to pure CO2 atmosphere at 700 °C for 5 h, the samples were investigated by X-ray diffraction analysis. It was found that even 15 mol% In could completely suppress degradation of the electrolyte. Ni-
BaCe0.75In0.25O3-δ/BaCe0.75In0.25O3-δ/LSCF-BaCe0.75In0.25O3-δ fuel cell was tested in wet hydrogen atmosphere and power density output of 264 mW•cm–2 was measured at 700 °C. This result is an indication of stability and functionality of this electrolyte and its versatility in respect to type of fuel and performing environment.",
publisher = "Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia",
journal = "6th Conference of the Serbian Society for Ceramic Materials",
title = "Stability and functionality of BaCe1-xInxO3-δ as a high temperature proton conducting electrolyte for solid oxide fuel cells",
pages = "57",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2212"
}

Malešević, A., Radojković, A., Žunić, M., Dapčević, A., Perać, S., Branković, Z.,& Branković, G.. (2022). Stability and functionality of BaCe1-xInxO3-δ as a high temperature proton conducting electrolyte for solid oxide fuel cells. in 6th Conference of the Serbian Society for Ceramic Materials
Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia., 57.
https://hdl.handle.net/21.15107/rcub_rimsi_2212

Malešević A, Radojković A, Žunić M, Dapčević A, Perać S, Branković Z, Branković G. Stability and functionality of BaCe1-xInxO3-δ as a high temperature proton conducting electrolyte for solid oxide fuel cells. in 6th Conference of the Serbian Society for Ceramic Materials. 2022;:57.
https://hdl.handle.net/21.15107/rcub_rimsi_2212 .

Malešević, Aleksandar, Radojković, Aleksandar, Žunić, Milan, Dapčević, Aleksandra, Perać, Sanja, Branković, Zorica, Branković, Goran, "Stability and functionality of BaCe1-xInxO3-δ as a high temperature proton conducting electrolyte for solid oxide fuel cells" in 6th Conference of the Serbian Society for Ceramic Materials (2022):57,
https://hdl.handle.net/21.15107/rcub_rimsi_2212 .

TY  - CONF
AU  - Radojković, Aleksandar
AU  - Žunić, Milan
AU  - Savic, Slavica
AU  - Perać, Sanja
AU  - Vojisavljević, Katarina
AU  - Luković Golić, Danijela
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2307
AB  - Composition of BaCe0.9Y0.1O3-δ was changed by co-doping with 5 mole % of different cations (In3+, Zr4+ and Nb5+) to examine the influence of dopants on the electrolyte properties. The powder samples were synthesized by the citric-nitric autocombustion method. BaCe0.85Y0.1In0.05O3-δ was successfully sintered at 1400 °C for 5 h in air, while a complete sintering of the other materials was carried out at 1550 °C. This makes the doping with In a preferable method since sintering temperatures below 1500 °C can limit BaO evaporation. The presence of In and Nb caused a significant drop in the total conductivity (σ) of the ceramics at 700 °C in wet hydrogen, while the total conductivity of BaCe0.85Y0.1Zr0.05O3-δ was slightly lower than of BaCe0.9Y0.1O3-δ. The stability of the ceramics exposed to a 100 % CO2 atmosphere at 700 °C for 5 h was investigated by X-ray analysis.
BaCe0.85Y0.1In0.05O3-δ showed considerable stability under the aggressive conditions containing traces of secondary phases, while the other samples were partially or significantly decomposed. By taking into account the factors that can influence the stability and conductivity, it was found that the dopant electronegativity had a
decisive role both in inhibiting the carbonation and in decreasing the total conductivity of the ceramics.
PB  - Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia
C3  - 5th Conference of the Serbian Society for Ceramic Materials
T1  - Adjusting the electrolyte properties of BaCe0.9Y0.1O3–δ by co-doping
SP  - 131
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2307
ER  - 

@conference{
author = "Radojković, Aleksandar and Žunić, Milan and Savic, Slavica and Perać, Sanja and Vojisavljević, Katarina and Luković Golić, Danijela and Branković, Zorica and Branković, Goran",
year = "2019",
abstract = "Composition of BaCe0.9Y0.1O3-δ was changed by co-doping with 5 mole % of different cations (In3+, Zr4+ and Nb5+) to examine the influence of dopants on the electrolyte properties. The powder samples were synthesized by the citric-nitric autocombustion method. BaCe0.85Y0.1In0.05O3-δ was successfully sintered at 1400 °C for 5 h in air, while a complete sintering of the other materials was carried out at 1550 °C. This makes the doping with In a preferable method since sintering temperatures below 1500 °C can limit BaO evaporation. The presence of In and Nb caused a significant drop in the total conductivity (σ) of the ceramics at 700 °C in wet hydrogen, while the total conductivity of BaCe0.85Y0.1Zr0.05O3-δ was slightly lower than of BaCe0.9Y0.1O3-δ. The stability of the ceramics exposed to a 100 % CO2 atmosphere at 700 °C for 5 h was investigated by X-ray analysis.
BaCe0.85Y0.1In0.05O3-δ showed considerable stability under the aggressive conditions containing traces of secondary phases, while the other samples were partially or significantly decomposed. By taking into account the factors that can influence the stability and conductivity, it was found that the dopant electronegativity had a
decisive role both in inhibiting the carbonation and in decreasing the total conductivity of the ceramics.",
publisher = "Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia",
journal = "5th Conference of the Serbian Society for Ceramic Materials",
title = "Adjusting the electrolyte properties of BaCe0.9Y0.1O3–δ by co-doping",
pages = "131",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2307"
}

Radojković, A., Žunić, M., Savic, S., Perać, S., Vojisavljević, K., Luković Golić, D., Branković, Z.,& Branković, G.. (2019). Adjusting the electrolyte properties of BaCe0.9Y0.1O3–δ by co-doping. in 5th Conference of the Serbian Society for Ceramic Materials
Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia., 131.
https://hdl.handle.net/21.15107/rcub_rimsi_2307

Radojković A, Žunić M, Savic S, Perać S, Vojisavljević K, Luković Golić D, Branković Z, Branković G. Adjusting the electrolyte properties of BaCe0.9Y0.1O3–δ by co-doping. in 5th Conference of the Serbian Society for Ceramic Materials. 2019;:131.
https://hdl.handle.net/21.15107/rcub_rimsi_2307 .

Radojković, Aleksandar, Žunić, Milan, Savic, Slavica, Perać, Sanja, Vojisavljević, Katarina, Luković Golić, Danijela, Branković, Zorica, Branković, Goran, "Adjusting the electrolyte properties of BaCe0.9Y0.1O3–δ by co-doping" in 5th Conference of the Serbian Society for Ceramic Materials (2019):131,
https://hdl.handle.net/21.15107/rcub_rimsi_2307 .

TY  - CONF
AU  - Perać, Sanja
AU  - Savic, Slavica
AU  - Kojic, Sanja
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2308
AB  - Thermoelectric materials, such as layered cobalt oxides, have been the subject of many theoretical and experimental investigations in past decade as potential candidates for application in energy conversion. In this work, polycrystalline samples of NaCo2-xCuxO4 (x = 0, 0.01, 0.03, 0.05) were synthesized from the powder precursors obtained by the citric acid complex method (CAC) and mechanochemically assisted solid state reaction method (MASSR). The obtained powders were uniaxially pressed into disc-shaped pellets and subsequently sintered at 880 °C in inert argon atmosphere. Indentation experiments were carried out to investigate mechanical properties. The hardness (H) and the Young's modulus of elasticity (Y) were determined using Agilent Nanoindenter G200. The surface approach velocity of the indenter (Berkovich pyramid) and Poisson ratio were set to 10 nm/s and 0.25, respectively. It was found that the highest Y (65.2 GPa) and H (1.41 GPa) were obtained for the CAC sample containing 1mol% of Cu. These results indicated a significant improvement of mechanical properties even in the case of the sample with the lowest dopant concentration.
PB  - Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia
C3  - 5th Conference of the Serbian Society for Ceramic Materials
T1  - Nanoindentation study of Cu doped NaCo2O4 ceramics
SP  - 132
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2308
ER  - 

@conference{
author = "Perać, Sanja and Savic, Slavica and Kojic, Sanja and Branković, Zorica and Branković, Goran",
year = "2019",
abstract = "Thermoelectric materials, such as layered cobalt oxides, have been the subject of many theoretical and experimental investigations in past decade as potential candidates for application in energy conversion. In this work, polycrystalline samples of NaCo2-xCuxO4 (x = 0, 0.01, 0.03, 0.05) were synthesized from the powder precursors obtained by the citric acid complex method (CAC) and mechanochemically assisted solid state reaction method (MASSR). The obtained powders were uniaxially pressed into disc-shaped pellets and subsequently sintered at 880 °C in inert argon atmosphere. Indentation experiments were carried out to investigate mechanical properties. The hardness (H) and the Young's modulus of elasticity (Y) were determined using Agilent Nanoindenter G200. The surface approach velocity of the indenter (Berkovich pyramid) and Poisson ratio were set to 10 nm/s and 0.25, respectively. It was found that the highest Y (65.2 GPa) and H (1.41 GPa) were obtained for the CAC sample containing 1mol% of Cu. These results indicated a significant improvement of mechanical properties even in the case of the sample with the lowest dopant concentration.",
publisher = "Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia",
journal = "5th Conference of the Serbian Society for Ceramic Materials",
title = "Nanoindentation study of Cu doped NaCo2O4 ceramics",
pages = "132",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2308"
}

Perać, S., Savic, S., Kojic, S., Branković, Z.,& Branković, G.. (2019). Nanoindentation study of Cu doped NaCo2O4 ceramics. in 5th Conference of the Serbian Society for Ceramic Materials
Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia., 132.
https://hdl.handle.net/21.15107/rcub_rimsi_2308

Perać S, Savic S, Kojic S, Branković Z, Branković G. Nanoindentation study of Cu doped NaCo2O4 ceramics. in 5th Conference of the Serbian Society for Ceramic Materials. 2019;:132.
https://hdl.handle.net/21.15107/rcub_rimsi_2308 .

Perać, Sanja, Savic, Slavica, Kojic, Sanja, Branković, Zorica, Branković, Goran, "Nanoindentation study of Cu doped NaCo2O4 ceramics" in 5th Conference of the Serbian Society for Ceramic Materials (2019):132,
https://hdl.handle.net/21.15107/rcub_rimsi_2308 .