dor_id: 4107476

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100.1.#.a: Chávez Guerrero, L.; Hinojosa Rivera, M.; Medina Lott, B.; Vannier, R N.; Ringuedé, A.; Cassir.

524.#.#.a: Chávez Guerrero, L., et al. (2017). Synthesis and characterization of Co-doped Lanthanum Nickelate perovskites for solid oxide fuel cell cathode material. Revista Mexicana de Física; Vol 63, No 1 Jan-Feb: 6-0. Recuperado de https://repositorio.unam.mx/contenidos/4107476

245.1.0.a: Synthesis and characterization of Co-doped Lanthanum Nickelate perovskites for solid oxide fuel cell cathode material

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Facultad de Ciencias, UNAM

264.#.0.c: 2017

264.#.1.c: 2017-01-01

653.#.#.a: Wet chemistry; SOFC cathode; Co content; microstructure; area-specific resistance

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041.#.7.h: eng

520.3.#.a: In the perovskite structures widely investigated and used as Solid Oxide Fuel Cells (SOFC) cathodes, oxygen reduction is mainly limited to the triple phase boundary (TPB), where oxygen (air), electrode and electrolyte are in contact. It is possible via the sol-gel modified Pechini method to: 1) control the material grain size, which can increase TPBs, 2) produce a homogenous material and 3) obtain a cathode material in a faster way compared with the solid state route. LaNixCo 1-x O3 (x = 0.3, 0.5, 0.7) were synthesized by the modified Pechini method. The perovskite phase formation began at 350\∘ C and the presence of pure LaNi 0.7 Co 0.3 O3 LaNi 0.5 Co 0.5 O3 and LaNi 0.3 Co 0.7 O3 structures was evidenced by High Temperature X-ray diffraction (HT-XRD) measurements. Scanning Electron Microscopy (SEM) micrographs showed that the microstructure evolves with the amount of cobalt from a coalesced to an open structure. Electrochemical impedance spectroscopy (EIS) on symmetrical cells LaNixCo 1-x O3/YSZ (yttria-stabilized zirconia)/LaNixCo 1-x O3 showed that the highest ASR (area specific resistance) is obtained with x = 0.3, whereas ASR values are similar for x = 0.5 and 0.7 at temperatures higher than 600\∘ C. At temperatures lower than 600\∘ C, ASR is the lowest for LaNi 0.5 Co 0.5 O3, showing that this composition with intermediate porosity appears as a good choice for an intermediate-temperature solid oxide fuel cell (SOFC).

773.1.#.t: Revista Mexicana de Física; Vol 63, No 1 Jan-Feb (2017): 6-0

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Artículo

Synthesis and characterization of Co-doped Lanthanum Nickelate perovskites for solid oxide fuel cell cathode material

Chávez Guerrero, L.; Hinojosa Rivera, M.; Medina Lott, B.; Vannier, R N.; Ringuedé, A.; Cassir.

Facultad de Ciencias, UNAM, publicado en Revista Mexicana de Física, y cosechado de Revistas UNAM

Licencia de uso

Procedencia del contenido

Entidad o dependencia
Facultad de Ciencias, UNAM
Revista
Repositorio
Contacto
Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

Cita

Chávez Guerrero, L., et al. (2017). Synthesis and characterization of Co-doped Lanthanum Nickelate perovskites for solid oxide fuel cell cathode material. Revista Mexicana de Física; Vol 63, No 1 Jan-Feb: 6-0. Recuperado de https://repositorio.unam.mx/contenidos/4107476

Descripción del recurso

Autor(es)
Chávez Guerrero, L.; Hinojosa Rivera, M.; Medina Lott, B.; Vannier, R N.; Ringuedé, A.; Cassir.
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Synthesis and characterization of Co-doped Lanthanum Nickelate perovskites for solid oxide fuel cell cathode material
Fecha
2017-01-01
Resumen
In the perovskite structures widely investigated and used as Solid Oxide Fuel Cells (SOFC) cathodes, oxygen reduction is mainly limited to the triple phase boundary (TPB), where oxygen (air), electrode and electrolyte are in contact. It is possible via the sol-gel modified Pechini method to: 1) control the material grain size, which can increase TPBs, 2) produce a homogenous material and 3) obtain a cathode material in a faster way compared with the solid state route. LaNixCo 1-x O3 (x = 0.3, 0.5, 0.7) were synthesized by the modified Pechini method. The perovskite phase formation began at 350\∘ C and the presence of pure LaNi 0.7 Co 0.3 O3 LaNi 0.5 Co 0.5 O3 and LaNi 0.3 Co 0.7 O3 structures was evidenced by High Temperature X-ray diffraction (HT-XRD) measurements. Scanning Electron Microscopy (SEM) micrographs showed that the microstructure evolves with the amount of cobalt from a coalesced to an open structure. Electrochemical impedance spectroscopy (EIS) on symmetrical cells LaNixCo 1-x O3/YSZ (yttria-stabilized zirconia)/LaNixCo 1-x O3 showed that the highest ASR (area specific resistance) is obtained with x = 0.3, whereas ASR values are similar for x = 0.5 and 0.7 at temperatures higher than 600\∘ C. At temperatures lower than 600\∘ C, ASR is the lowest for LaNi 0.5 Co 0.5 O3, showing that this composition with intermediate porosity appears as a good choice for an intermediate-temperature solid oxide fuel cell (SOFC).
Tema
Wet chemistry; SOFC cathode; Co content; microstructure; area-specific resistance
Idioma
eng
ISSN
2683-2224 (digital); 0035-001X (impresa)

Enlaces