Development of layered anode structures supported over Apatite-type Solid Electrolytes

Abstract

Abstract. Apatite-type lanthanum silicates (ATLS) materials have attracted interest in recent literature as solid electrolytes for SOFCs. The fabrication of an ATLS based fuel cell with the state-of-art electrodes (NiO/YSZ as anode and LSCF or LSM as cathode) can show degradation after long operation hours due to Si diffusion mainly towards the anode. In this work, we report a "layer-by-layer anodic electrodes" fabrication by means of spin coating and physical spraying. The overall aim of this work is the successful fabrication of such a layered structure including suitable blocking layers towards the inhibition of Si interdiffusion from the apatite electrolyte to the anode. The results showed that the deposition of 3 layers of LFSO/GDC (3μm), NiO/GDC (4μm) and the final NiO/YSZ anode layer provided a stable half-cell, with no solid state reaction occurring among the electrodes and no Si diffusion observed towards the anode after thermal treatment at 800 o C for 120h.

A review on the preparation of anode materials and anode films for solid oxide fuel cell applications

“…This method is very simple, reproducible and the obtained film is uniform on the smooth and flat substrate. Some studies use this method to deposit anode 70‐72 . For instance, NiO‐BCZY anode was spin‐coated on BCZY electrolyte at 3000 rpm for 50 s and the resultant anode was highly dense and free from any cracks 71 .…”

“…Some studies use this method to deposit anode. [70][71][72] For instance, NiO-BCZY anode was spin-coated on BCZY electrolyte at 3000 rpm for 50 s and the resultant anode was highly dense and free from any cracks. 71 Symmetrical cells of CuO-CGO/CGO/CuO-CGO were also prepared by spin-coating of CuO-CGO slurry on flat surfaces [104][105][106] of CGO pellets.…”

Performance assessment of a four-air cathode membraneless microbial fuel cell stack for wastewater treatment and energy extraction

“…In any case, an MFC remains a complex system that involves a number of technological, electrochemical and microbiological aspects, which need to be understood before the technology can be implemented in practice and in real life environments. Electrochemical Impedance Spectroscopy (EIS) is a technique widely used to give an insight to the electrochemical phenomena in fuel cells [8][9][10][11]. This technique has become a valuable and in-depth understanding tool for phenomena occurring in individual MFC units as well as in MFC stacks [12,13].…”

Operation and Electro(chemical) characterization of a microbial fuel cell stack fed with fermentable household waste extract

“…It therefore becomes vital to understand the phenomena occurring in such stacks in order to avoid this phenomenon (Greenman et al, 2011). Electrochemical Impedance Spectroscopy (EIS) has proved to be a powerful technique which can give an insight to the electrochemical phenomena in fuel cells (Gasparyan et al, 2009;Gasparyan et al, 2011;Pandis et al, 2016a;Pandis et al, 2016b). Its use has become a valuable and in depth understanding tool for phenomena occurring in individual MFC units so as in MFC stacks (Zhao et al, 2009;Hidalgo et al, 2015;Santoro et al, 2017).…”