Proton-Conducting La-Doped Ceria-Based Internal Reforming Layer for Direct Methane Solid Oxide Fuel Cells
MetadataShow full item record
Performance degradation caused by carbon deposition substantially restricts the development of direct methane solid oxide fuel cells (SOFCs). Here, an internal reforming layer composed of Ni supported on proton conducting La-doped ceria, such as La2Ce2O7 (LDC) and La1.95Sm0.05Ce2O7 (LSDC) is applied over conventional Ni-Ce0.8Sm0.2O2-x (SDC) anodes for direct methane SOFCs. The proton conducting layer can adsorb water for internal reforming thus significantly improving the performance of the direct methane SOFCs. In situ Raman and FTIR results confirm the water adsorption capacity of LDC and LSDC. They also exhibit excellent phase stability in wet CO2 at 650 °C for 10 h, which ensures that the additional catalyst layer maintains structure stability during the internal reforming. In wet methane at 650 °C, the peak power density of the conventional cell is only 580 ± 20 mW cm(-2), and increases to 699 ± 20 and 639 ± 20 mW cm(-2) with the addition of Ni-LDC and -LSDC layers, respectively. For the stability test in wet methane at 650 °C and 0.2 A cm(-2), the voltage of the conventional cell starts to drop dramatically in 10 h, while the Ni-LDC and -LSDC catalyst layers operate stably in 26 h under the identical conditions. These catalyst layers even show comparable stability in dry and wet methane in 26 h, but for longer operation, the wet methane is still preferred for maintaining the stability of the cell.
Showing items related by title, author, creator and subject.
Coking-resistant Ce<inf>0.8</inf>Ni<inf>0.2</inf>O<inf>2-d</inf>internal reforming layer for direct methane solid oxide fuel cellsZhao, J.; Xu, X.; Li, M.; Zhou, W.; Liu, Shaomin; Zhu, Z. (2018)© 2018 The development of direct methane solid oxide fuel cells (SOFCs) is severely hindered by the deactivation of conventional Ni-based anodes due to carbon fouling. Here, a Ce0.8Ni0.2O2-d(CNO) internal reforming layer ...
In situ fabrication of (Sr,La)FeO<inf>4</inf> with CoFe alloy nanoparticles as an independent catalyst layer for direct methane-based solid oxide fuel cells with a nickel cermet anodeChang, H.; Chen, H.; Shao, Zongping; Shi, J.; Bai, J.; Li, S. (2016)© 2016 The Royal Society of Chemistry.An independent catalyst layer is applied to develop a highly effective way to reduce coking when operating in methane based fuels, in which the catalyst layer is separated from a Ni ...
Effect of nickel content and preparation method on the performance of Ni-Al2O3 towards the applications in solid oxide fuel cellsWang, W.; Ran, R.; Su, C.; Shao, Zongping; Jung, D.; Seo, S.; Lee, S. (2011)Ni-Al2O3 composites with varying contents of nickel are synthesized via a glycine nitrate process (GNP) and an impregnation process (IMP). Their potential application as an anode functional layer for internal methane CO2 ...