Title Nanostructured gadolinia doped ceria ceramics for low-temperature solid oxide fuel cells application /
Authors Abakevičienė, Brigita ; Kalyk, Fariza ; Tamulevičius, Tomas ; Tamulevičius, Sigitas
DOI 10.17756/nwj.2022-suppl1
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Is Part of NanoWorld journal: Future materials 2022: 3rd international conference on material science & nanotechnology, 3-7 October, 2022, Rome, Italy: meeting abstracts.. Plano, TX : United scientific group. 2022, vol. 8, suppl. 1, p. S69.. ISSN 2379-1101
Keywords [eng] solid oxide fuel cells ; gadolinia doped ceria ; co-precipitation
Abstract [eng] One of the most frequently studied and used electrochemical energy conversion devices are solid oxide fuel cells (SOFCs). Low-temperature SOFCs (LT-SOFCs), operating at 400-650 °C, are denoted by a shorter start-up time, do not require expensive materials, and can be used in portable devices. Gadolinia doped ceria (GDC) is still one of promising electrolyte material for LTSOFC application. Due to their chemical stability and high ionic conductivity, GDC ceramics can be used not only as an electrolyte, but also as a diffusion barrier layer between the cathode and electrolyte in SOFCs. In this work, GDC nanopowders were synthesised by co-precipitation synthesis method and used as a target material to form ceria-based thin films using the electron beam evaporation technique. The morphological properties of the pressed ceramic pellets were examined using scanning electron microscopy (SEM). The impedance spectroscopy showed an increase in the total resistance of ceramics with the increase of the concentration of Gd2O3 in GDC. The annealing of the GDC films up to 900 °C had a minor affects its surface roughness and the morphology with minimal increase of the densification and roughness. XRD and Raman spectroscopy results confirmed the improvement of the crystallinity for corresponding thin films and the decrease of grain boundary phase volume. XPS and ICP-OES measurements showed that, to obtain the desired concentration of the final thin films, the concentration of the synthesised target material used for the electron beam evaporation should be ~28 % higher.
Published Plano, TX : United scientific group
Type Conference paper
Language English
Publication date 2022
CC license CC license description