Core–shell structured Li0.33La0.56TiO3 perovskite as a highly efficient and sulfur-tolerant anode for solid-oxide fuel cells
MetadataShow full item record
Solid oxide fuel cells (SOFCs), which directly convert chemical energy into electricity, have several advantages, such as fuel flexibility and low emissions. Unfortunately, the performance and stability of SOFCs with state-of-the-art Ni-based anodes are sensitive to impurities, such as sulfur, which is a common component of practical fuels, including natural gas and renewable biogas. The development of sulfur-tolerant anode materials is important for successfully operating SOFCs with sulfur-containing practical fuels. In this study, a core–shell architecture was fabricated from solution infiltration and was evaluated as a sulfur-tolerant anode for SOFCs. For the first time, we used a lithium conductive material, Li0.33La0.56TiO3 (LLTO, perovskite oxide), as the shell for anodic reactions. The resulting cell delivered higher electrochemical activities than similar cells, with widely used sulfur-tolerant perovskite anodes. In addition, the cell with the core–shell structured anode demonstrated favorable stability over 70 hours' operation when using 1000 ppm H2S–H2 fuel at 800 °C. In contrast, the cell with an anode composed of nanoparticles failed after only 5.5 hours under the same operation conditions. This study offers a new strategy for developing highly sulfur tolerant and efficient anodes for SOFCs.
This open access article is distributed under the Creative Commons license http://creativecommons.org/licenses/by-nc/3.0/
Showing items related by title, author, creator and subject.
One-pot synthesis of silver-modified sulfur-tolerant anode for SOFCs with an expanded operation temperature windowQu, J.; Wang, Wei; Yang, T.; Chen, Y.; Shao, Zongping (2017)Â© 2017 American Institute of Chemical Engineers To develop solid oxide fuel cells (SOFCs) capable of operating on sulfur-containing practical fuels at intermediate temperatures, further improvement of the sulfur tolerance ...
Nickel-Iron Alloy Nanoparticle-Decorated K2NiF4-Type Oxide as an Efficient and Sulfur-Tolerant Anode for Solid Oxide Fuel CellsWu, N.; Wang, W.; Zhong, Y.; Yang, G.; Qu, J.; Shao, Zongping (2017)We report a new nickel-iron alloy nanoparticle-decorated LaSrFe0.75Ni0.25O4 K2NiF4-type oxide with Ruddlesden-Popper structure (RP-LSFN), which performed as a high-performance sulfur-resistant anode prepared by using an ...
H2S poisoning effect and ways to improve sulfur tolerance of nickel cermet anodes operating on carbonaceous fuelsChen, H.; Wang, F.; Wang, W.; Chen, D.; Li, S.; Shao, Zongping (2016)For commercialization-oriented solid oxide fuel cells, the state-of-the-art nickel cermet anodes are still the preferable choice because of their several favorable features, such as high electrical conductivity, good ...