Structural, morphological, and electrochemical behavior of titanium-doped SrFe1-xTixO3-δ (x = 0.1–0.5) perovskite as a cobalt-free solid oxide fuel cell cathode

Baharuddin, Nurul Akidah; Aman, Nurul Ashikin Mohd Nazrul; Muchtar, Andanastuti; Somalu, Mahendra Rao; Osman, Nafisah; Aznam, Isyraf

doi:10.1016/j.ceramint.2019.03.216

Cited by 25 publications

(9 citation statements)

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“…As expected, the electrode with higher Ti content, LSFT 0.4 -FD, exhibits poorer electrochemical activity, which can be attributed to its low electrical conductivity in air. Similar findings have also been observed in the SrFe 1– x Ti x O 3−δ (0 < x ≤ 0.5) series …”

Section: Results and Discussionsupporting

confidence: 86%

“…Particularly, LSFT 0.4 –Inf exhibits R p values of 0.67 cm 2 at 700 °C, clearly outperforming the values obtained for the screen-printed electrodes (8.84 cm 2 at 700 °C), though they still remain relatively high for considering them as air electrodes (Figure a,b). Comparatively, these R p values are better to those observed in air for other Sr-rich related electrodes, such as SrFe 0.9 Ti 0.1 O 3−δ (2.34 Ω cm 2 at 700 °C), and La 0.3 Sr 0.7 Fe 0.7 Ti 0.3 O 3−δ (0.11 Ω cm 2 at 800 °C), 18 as well as compositions with active exsolved metals, like Sm 0.70 Sr 0.20 Fe 0.80 Ti 0.15 Ru 0.05 O 3−δ (0.13 Ω cm 2 at 800 °C) and La 0.7 Sr 0.3 Ti 0.1 Fe 0.6 Ni 0.3 O 3−δ (0.18 Ω cm 2 at 700 °C) (Table S3). …”

Section: Results and Discussionmentioning

confidence: 57%

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Enhancing the Electrochemical Performance in Symmetrical Solid Oxide Cells through Nanoengineered Redox-Stable Electrodes with Exsolved Nanoparticles

Zamudio-García,

Porras-Vázquez,

Losilla

et al. 2023

ACS Appl. Mater. Interfaces

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Symmetrical solid oxide cells (SSOCs) have recently gained significant attention for their potential in energy conversion due to their simplified cell configuration, cost-effectiveness, and excellent reversibility. However, previous research efforts have mainly focused on improving the electrode performance of perovskite-type electrodes through different doping strategies, neglecting microstructural optimization. This work presents novel approaches for the nanostructural tailoring of (La 0.8 Sr 0.2 ) 0.95 Fe 1−x Ti x O 3−δ (LSFT x , x = 0.2 and 0.4) electrodes using a single-step spray-pyrolysis deposition process. By incorporating these electrodes into a Ce 0.9 Gd 0.1 O 1.95 (CGO) porous backbone or employing a nanocomposite architecture with nanoscale particle size, we achieved significant improvements in the polarization resistance (R p ) compared with traditional screenprinted electrodes. To further boost the fuel oxidation performance, a Ni-doping strategy, coupled with meticulous microstructural optimization, was implemented. The exsolution of Ni nanoparticles under reducing conditions resulted in remarkable R p values as low as 0.34 and 0.11 Ω cm 2 in air and wet H 2 at 700 °C, respectively. Moreover, an electrolyte-supported cell with symmetrical electrodes demonstrated a stable maximum power density of 617 mW cm −2 at 800 °C. These findings highlight the importance of combining electrode composition optimization with advanced morphology control in the design of highly efficient and durable SSOCs.

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Section: Results and Discussionsupporting

confidence: 86%

Section: Results and Discussionmentioning

confidence: 57%

Enhancing the Electrochemical Performance in Symmetrical Solid Oxide Cells through Nanoengineered Redox-Stable Electrodes with Exsolved Nanoparticles

Zamudio-García,

Porras-Vázquez,

Losilla

et al. 2023

ACS Appl. Mater. Interfaces

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“…It is a known fact that most of the ceramic titanate materials contain the cubic perovskite structure with a general chemical formula ABO 3, where 'A' atom is located at the corner position, 'B' atom occupies the body centre position and the oxygen atom prefers at the face centre position of the cubic unit cell [1][2][3][4][5][6][7][8][9][10]. In general, the barium titanate (BT) is a promising dielectric material exhibiting very attractive and tremendous applications caused due to the low particle size [11].…”

Section: Introductionmentioning

confidence: 99%

Optical and functional properties of hydrothermally synthesized tetragonal Ba_0.4Cu_0.6−xLa_xTiO₃ (x = 0.2–0.6) nanoparticles

Prakash

Kumar

Naidu

2020

Mater. Res. Express

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Ba 0.4 Cu 0.6−x La x TiO 3 (x=0.2, 0.4 & 0.6) (BCLT) nanoparticles were prepared by hydrothermal method. The x-ray diffraction (XRD) pattern established the existence of tetragonal phases. The nanospheres were observed in the surface morphology of present materials using the transmission electron microscopy (TEM). The optical properties were investigated to confirm the presence of metal oxide bonds as well as the optical band-gap energy of BCLT nanoparticles. The dielectric and impedance parameters were studied as a function of frequency and composition. The Cole-Cole plots were drawn to understand the microstructure and electrical conduction mechanism. In addition, the ferroelectric nature was carried out with the help of polarization versus electric field (P-E) loop tracer. Materials and methodsBa 0.4 Cu 0.6−x La x TiO 3 (x=0.2, 0.4, & 0.6) nanoparticles were synthesized via hydrothermal technique. The flow chart for the preparation of BCLT samples was depicted in figure 1. The starting raw materials of Ba (NO 3 ) 2 .6H 2 O

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“…Furthermore, these materials possess a significant advantage that is the simple crystalline structure and low cost for the preparation of these materials in monocrystalline or polycrystalline form. Any small modification of their typical crystal structure and chemical composition may lead to the production of unique transport (Choudhary et al 2020), magnetic (Abbas et al 2019), catalytic (Abirami et al 2020), thermochemical (Gokon et al 2019), mechanical (Wang et al 2016a), and electrochemical (Baharuddin et al 2019) properties. Recently, increased efforts have taken place by research groups worldwide concentrating on optimizing the physical properties of perovskite-structured compounds.…”

Section: Inorganic Perovskite-type Oxidesmentioning

confidence: 99%

Advanced materials and technologies for supercapacitors used in energy conversion and storage: a review

et al. 2020

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Supercapacitors are increasingly used for energy conversion and storage systems in sustainable nanotechnologies. Graphite is a conventional electrode utilized in Li-ion-based batteries, yet its specific capacitance of 372 mA h g −1 is not adequate for supercapacitor applications. Interest in supercapacitors is due to their high-energy capacity, storage for a shorter period and longer lifetime. This review compares the following materials used to fabricate supercapacitors: spinel ferrites, e.g., MFe 2 O 4 , MMoO 4 and MCo 2 O 4 where M denotes a transition metal ion; perovskite oxides; transition metals sulfides; carbon materials; and conducting polymers. The application window of perovskite can be controlled by cations in sublattice sites. Cations increase the specific capacitance because cations possess large orbital valence electrons which grow the oxygen vacancies. Electrodes made of transition metal sulfides, e.g., ZnCo 2 S 4 , display a high specific capacitance of 1269 F g −1 , which is four times higher than those of transition metals oxides, e.g., Zn-Co ferrite, of 296 F g −1. This is explained by the low charge-transfer resistance and the high ion diffusion rate of transition metals sulfides. Composites made of magnetic oxides or transition metal sulfides with conducting polymers or carbon materials have the highest capacitance activity and cyclic stability. This is attributed to oxygen and sulfur active sites which foster electrolyte penetration during cycling, and, in turn, create new active sites.

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Structural, morphological, and electrochemical behavior of titanium-doped SrFe1-xTixO3-δ (x = 0.1–0.5) perovskite as a cobalt-free solid oxide fuel cell cathode

Cited by 25 publications

References 50 publications

Enhancing the Electrochemical Performance in Symmetrical Solid Oxide Cells through Nanoengineered Redox-Stable Electrodes with Exsolved Nanoparticles

Enhancing the Electrochemical Performance in Symmetrical Solid Oxide Cells through Nanoengineered Redox-Stable Electrodes with Exsolved Nanoparticles

Optical and functional properties of hydrothermally synthesized tetragonal Ba_0.4Cu_0.6−xLa_xTiO₃ (x = 0.2–0.6) nanoparticles

Advanced materials and technologies for supercapacitors used in energy conversion and storage: a review

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Structural, morphological, and electrochemical behavior of titanium-doped SrFe1-xTixO3-δ (x = 0.1–0.5) perovskite as a cobalt-free solid oxide fuel cell cathode

Cited by 25 publications

References 50 publications

Enhancing the Electrochemical Performance in Symmetrical Solid Oxide Cells through Nanoengineered Redox-Stable Electrodes with Exsolved Nanoparticles

Enhancing the Electrochemical Performance in Symmetrical Solid Oxide Cells through Nanoengineered Redox-Stable Electrodes with Exsolved Nanoparticles

Optical and functional properties of hydrothermally synthesized tetragonal Ba0.4Cu0.6−xLaxTiO3 (x = 0.2–0.6) nanoparticles

Advanced materials and technologies for supercapacitors used in energy conversion and storage: a review

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Optical and functional properties of hydrothermally synthesized tetragonal Ba_0.4Cu_0.6−xLa_xTiO₃ (x = 0.2–0.6) nanoparticles