Characterization of LaSrCoFeO3 cathode material prepared with the aid of functionalized carbon nanotubes for proton conducting fuel cell

Malek, Nurul Izzati Abd; Ismail, Ilham Ameera; Jani, Abdul Mutalib Md; Osman, Nafisah

doi:10.1063/5.0003788

Cited by 3 publications

(5 citation statements)

References 16 publications

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“…20 KGy); which is also of higher surface area and oxygen vacancy formation.The lowest ASR is associated with extension of TPB. This result is excellently compared by other studies (Abd Malek et al, 2020;Ismariza et al, 2020).…”

Section: Polarization Resistancesupporting

confidence: 88%

“…The Photoluminescence characteristics were determined at room temperature using a spectrofluorometer (JASCO FP-6500) with an excitation wave length set at λ=240 nm ; which was higher than the optical gap of our samples. (Ismariza et al, 2020) demonstrated that the 480 and 600 nm emission peaks originate from defect electronic states formed by surface oxygen vacancies and 435 nm luminescence emission peaks from the in-plan oxygen vacancies. AS shown in Fig.…”

Section: Photoluminescence Spectroscopymentioning

confidence: 98%

“…5, all LSCF samples have a strong green photoluminescence (PL) at room temperature; where the emission peak located at 480 nm is related to the combination of holes with two electron trape oxygen vacancies (V O ). Morever, the PL intensity for irradiated samples was decreased than irradiated one due to radiation; which led to formation of high oxygen vacancies (Adler et al, 2007;Kernazhitsky et al, 2017;Abd Malek et al, 2020).…”

Section: Photoluminescence Spectroscopymentioning

confidence: 99%

“…The resultant arc in nyquist plot was indicated to ORR; according to pervious studies (Perry Murray et al, 2002;Gu et al, 2009;Ali et al, 2012). These arcs in all LSCF samples were led to information about oxygen diffusion and dissociation processes determinate the ORR rate (Ismariza et al, 2020). The polarization resistance (Rp) at high frequency arc is related to charge (ion and electron) transfer resistances occurring at the current collector/cathode interfaces.…”

Section: Nyquist Plotmentioning

confidence: 99%

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Electrical Characterization of Irradiated-La0.6Sr0.4Co0.2Fe0.8O3 Cathodes for Intermediate-Temperature SOFCs Applications

Ahmed

Borham²,

Ibrahim³

et al. 2023

Egypt. J. Rad.Sci.

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I DEVELOPING low-polarization and stable cathodes is a key element to the success of intermediate-temperature solid oxide fuel cells (IT-SOFCs). Here we report a study on the electrochemical performance and stability of a La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF) cathode material using gamma irradiation approach; with different doses namely, 20kGy, 250kGy and 500 kGy. This is an innovative method; which has an tremendous effect on the Morphology and electrical properties. LSCF cathode samples were systematically characterized using X-ray diffraction (XRD), photoluminescence (PL), high resolution transmission electron microscope (HRTEM), and BET surface area analyzer. The occupancy of oxygen vacancies in the samples was conceded by PL studies. Electrical properties were investigated for both the un irradiated and irradiated (LSCF) samples at various operating temperatures from room temperature up to 400 o C.This novel study shows that the cathode performance was strongly influenced by particle size, surface area and formation of oxygen vacancies. All physical and electrical properties for LSCF samples were improved by using gamma radiation approach; which has a high impact on the cell performance.

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Section: Polarization Resistancesupporting

confidence: 88%

Section: Photoluminescence Spectroscopymentioning

confidence: 98%

Section: Photoluminescence Spectroscopymentioning

confidence: 99%

Section: Nyquist Plotmentioning

confidence: 99%

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Electrical Characterization of Irradiated-La0.6Sr0.4Co0.2Fe0.8O3 Cathodes for Intermediate-Temperature SOFCs Applications

Ahmed

Borham²,

Ibrahim³

et al. 2023

Egypt. J. Rad.Sci.

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“…Usually, dispersing agent is a carbon-based compound. To date, to the best of authors' knowledge, dispersing agent of carbon black, activated carbon (AC) and carbon nanotubes (CNTs) were employed to produce La0.6Sr0.4Co0.2Fe0.8CoO3-δ (LSCF) perovskite-type oxide material via sol-gel method as reported by Kim et al [10], Ismail et al [11] and Malik et al [12]. However, there are limited reports on the powder properties of LSCO material produced via sol-gel method using CNTs as dispersing agent.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of carbon nanotubes and activated carbon assisted sol-gel derived La_0.6Sr_0.4CoO_3-δ material

Osman

Darus²,

Ismail³

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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A pure perovskite-type oxide ceramic nanomaterial can be produced at a lower processing temperature than 1000 °C via sol-gel method. However, it is influenced by the nature of chemical agents such as chelating agent, surfactant and dispersant added during the synthesis process. Among them, dispersant is regarded as an important chemical agent as it can prevent the formation of hard agglomerated particles which is the main drawback of sol-gel method. In the present work, ceramic powder of lanthanum strontium cobaltite, La0.6Sr0.4CoO3-δ (LSCO) was prepared via sol-gel method with the aid of carbon nanotubes (CNTs) and activated carbon (AC) as dispersant. The prepared powder was characterized by thermal gravimetric analyser (TGA), X-ray diffractometer (XRD) and scanning electron microscope (SEM) equipped with energy dispersive X-ray (EDX) spectrometer to evaluate its thermal decomposition, structural and microstructure properties, respectively. Thermal decomposition of the as-synthesized CNTs-based and AC-based powders completed at temperature 750 °C and pure perovskite phase of LSCO was formed at temperature 900 °C. Both CNTs-based and AC-based calcined powders consist of homogeneous and almost identical shape of particles. However, the CNTs-based calcined powder has higher agglomeration index value than the AC-based calcined powder as revealed in SEM images.

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Air separation via two-step solar thermochemical cycles based on SrFeO_3−δ and (Ba,La)_0.15Sr_0.85FeO_3−δ perovskite reduction/oxidation reactions to produce N₂: rate limiting mechanism(s) determination

Nguyen

Farr

Bush

et al. 2021

Phys. Chem. Chem. Phys.

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Characterization of LaSrCoFeO3 cathode material prepared with the aid of functionalized carbon nanotubes for proton conducting fuel cell

Cited by 3 publications

References 16 publications

Electrical Characterization of Irradiated-La0.6Sr0.4Co0.2Fe0.8O3 Cathodes for Intermediate-Temperature SOFCs Applications

Electrical Characterization of Irradiated-La0.6Sr0.4Co0.2Fe0.8O3 Cathodes for Intermediate-Temperature SOFCs Applications

Synthesis and characterization of carbon nanotubes and activated carbon assisted sol-gel derived La_0.6Sr_0.4CoO_3-δ material

Air separation via two-step solar thermochemical cycles based on SrFeO_3−δ and (Ba,La)_0.15Sr_0.85FeO_3−δ perovskite reduction/oxidation reactions to produce N₂: rate limiting mechanism(s) determination

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Characterization of LaSrCoFeO3 cathode material prepared with the aid of functionalized carbon nanotubes for proton conducting fuel cell

Cited by 3 publications

References 16 publications

Electrical Characterization of Irradiated-La0.6Sr0.4Co0.2Fe0.8O3 Cathodes for Intermediate-Temperature SOFCs Applications

Electrical Characterization of Irradiated-La0.6Sr0.4Co0.2Fe0.8O3 Cathodes for Intermediate-Temperature SOFCs Applications

Synthesis and characterization of carbon nanotubes and activated carbon assisted sol-gel derived La0.6Sr0.4CoO3-δ material

Air separation via two-step solar thermochemical cycles based on SrFeO3−δ and (Ba,La)0.15Sr0.85FeO3−δ perovskite reduction/oxidation reactions to produce N2: rate limiting mechanism(s) determination

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Product

Resources

About

Synthesis and characterization of carbon nanotubes and activated carbon assisted sol-gel derived La_0.6Sr_0.4CoO_3-δ material

Air separation via two-step solar thermochemical cycles based on SrFeO_3−δ and (Ba,La)_0.15Sr_0.85FeO_3−δ perovskite reduction/oxidation reactions to produce N₂: rate limiting mechanism(s) determination