dc.creator | Zhang, Shan-Lin | |
dc.creator | Wang, Hongqian | |
dc.creator | Lu, Matthew Y. | |
dc.creator | Zhang, Ai-Ping | |
dc.creator | Mogni, Liliana Verónica | |
dc.creator | Liu, Qinyuan | |
dc.creator | Li, Cheng-Xin | |
dc.creator | Li, Chang-Jiu | |
dc.creator | Barnett, Scott A. | |
dc.date.accessioned | 2020-03-18T14:18:06Z | |
dc.date.accessioned | 2022-10-15T10:49:47Z | |
dc.date.available | 2020-03-18T14:18:06Z | |
dc.date.available | 2022-10-15T10:49:47Z | |
dc.date.created | 2020-03-18T14:18:06Z | |
dc.date.issued | 2018-07 | |
dc.identifier | Zhang, Shan-Lin; Wang, Hongqian; Lu, Matthew Y.; Zhang, Ai-Ping; Mogni, Liliana Verónica; et al.; Cobalt-substituted SrTi0.3Fe0.7O3-: δ a stable high-performance oxygen electrode material for intermediate-temperature solid oxide electrochemical cells; Royal Society of Chemistry; Energy & Environmental Science; 11; 7; 7-2018; 1870-1879 | |
dc.identifier | 1754-5692 | |
dc.identifier | http://hdl.handle.net/11336/99985 | |
dc.identifier | CONICET Digital | |
dc.identifier | CONICET | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4377500 | |
dc.description.abstract | A key need in the development of solid oxide cells (SOCs) is for electrodes that promote fast oxygen reduction and oxygen evolution reactions at reduced operating temperature (≤700 °C), with sufficient durability to allow operation over desired 40 000 h lifetimes. A wide range of electrode materials have been investigated, with some providing resistance low enough for cell operation below 700 °C, but it is generally found that the electrode performance degrades over time. Here we demonstrate an oxygen electrode material, Sr(Ti0.3Fe0.7-xCox)O3-δ (STFC), that provides a unique combination of excellent oxygen electrode performance and long-term stability. The addition of a relatively small amount of Co to Sr(Ti0.3Fe0.7)O3-δ, e.g., x = 0.07, reduces the electrode polarization resistance by >2 times. The STFC electrode yields stable performance in both fuel cell and electrolysis modes at 1 A cm-2. The fundamental oxygen diffusion and surface exchange coefficients of STFC are determined, and shown to be substantially better than those of La0.6Sr0.4Co0.2Fe0.8O3-δ, the most widely used SOC oxygen electrode material. While other electrode materials have been shown to exhibit better oxygen transport coefficients than STFC, they do not match its stability. | |
dc.language | eng | |
dc.publisher | Royal Society of Chemistry | |
dc.relation | info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1039/C8EE00449H | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://pubs.rsc.org/en/content/articlelanding/2018/EE/C8EE00449H | |
dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | |
dc.rights | info:eu-repo/semantics/openAccess | |
dc.subject | Oxygen reduction reaction | |
dc.subject | SOFC | |
dc.subject | cathode | |
dc.subject | titanates | |
dc.title | Cobalt-substituted SrTi0.3Fe0.7O3-: δ a stable high-performance oxygen electrode material for intermediate-temperature solid oxide electrochemical cells | |
dc.type | info:eu-repo/semantics/article | |
dc.type | info:ar-repo/semantics/artículo | |
dc.type | info:eu-repo/semantics/publishedVersion | |