Please use this identifier to cite or link to this item:
http://hdl.handle.net/1843/58466| Type: | Artigo de Periódico |
| Title: | Influence of cathode functional layer composition on electrochemical performance of solid oxide fuel cells |
| Authors: | Antônio de Pádua Lima Fernandes Eric Marsalha Garcia Rubens Moreira de Almeida Hosane Aparecida Taroco Edyth Priscilla Campos Silva Rosana Zacarias Domingues Tulio Matencio |
| Abstract: | In this work, anode-supported solid oxide fuel cells (SOFC) were tested with a yttria-stabilized zirconia (YSZ) (8 mol% Y2O3-ZrO2)/gadolinium-doped ceria (GDC) (Ce0.9Gd 0.1O1.95) bilayer electrolyte and two lanthanum strontium cobalt ferrite (LSCF) composition as functional cathode layer: La0.6Sr0.4Co0.8Fe0.2O3-δ (LSCF 1) and La0.60Sr0.40Co0.2Fe0.8O3-δ (LSCF 2). The functional cathode layers were made of 50 % (w/w) LSCF and 50 % (w/w) GDC. Microstructural characterization was performed by scanning electron microscopy and X-ray diffraction. Electrochemical impedance spectroscopy (EIS) and power measurements were performed under oxygen and hydrogen atmospheres. The microscopy studies showed that the LSCF 2 functional layer is more uniform and adherent to the electrolyte and the cathode collector than the LSCF 1 functional layer, which has cracks, chips, and lower adhesion. The use of the LSCF 2 layer allowed an approximately 25-fold reduction in ohmic resistance (0.06 Ω cm−²) compared with the LSCF 1 layer (1.5 Ω cm−²). The power measurements showed a considerable increase in the power cell using LSCF 2 (approximately 420 mW cm−²) compared with the power cell using LSCF 1 (approximately 180 mW cm−²). |
| Subject: | Eletroquímica Química do estado sólido Células à combustível Ferrita Lantâneo Estrôncio Cobalto |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE QUÍMICA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | https://doi.org/10.1007/s10008-016-3241-4 |
| URI: | http://hdl.handle.net/1843/58466 |
| Issue Date: | 2016 |
| metadata.dc.url.externa: | https://link.springer.com/article/10.1007/s10008-016-3241-4 |
| metadata.dc.relation.ispartof: | Journal of Solid State Electrochemistry |
| Appears in Collections: | Artigo de Periódico |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.