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Analysis of $La_{4}Ni_{3}O_{10±δ}-BaCe_{0.9}Y_{0.1}O_{3-δ}$ Composite Cathodes for Proton Ceramic Fuel Cells
| Content Provider | MDPI |
|---|---|
| Author | Vanessa, Graça Loureiro, Francisco Ramasamy, Devaraj Holz, Laura Mikhalev, Sergey Fagg, Duncan |
| Copyright Year | 2021 |
| Description | Layered Ruddlesden-Popper (RP) lanthanide nickelates, Ln n+ 1Ni n O3n+1 (Ln = La, Pr, and Nd; n = 1, 2, and 3) have generated great interest as potential cathodes for proton conducting fuel cells (PCFCs). The high-order phase (n = 3) is especially intriguing, as it possesses the property of a high and metallic-type electronic conductivity that persists to low temperatures. To provide the additional requirement of high ionic conductivity, a composite electrode is here suggested, formed by a combination of La4Ni3O10±δ with the proton conducting phase BaCe0.9Y0.1O3-δ (40 vol%). Electrochemical impedance spectroscopy (EIS) is used to analyse this composite electrode in both wet (p H2O ~ 10−2 atm) and low humidity (p H2O ~ 10−5 atm) conditions in an O2 atmosphere (400–550 °C). An extended analysis that first tests the stability of the impedance data through Kramers-Kronig and Bayesian Hilbert transform relations is outlined, that is subsequently complemented with the distribution function of relaxation times (DFRTs) methodology. In a final step, correction of the impedance data against the short-circuiting contribution from the electrolyte substrate is also performed. This work offers a detailed assessment of the La4Ni3O10±δ-BaCe0.9Y0.1O3-δ composite cathode, while providing a robust analysis methodology for other researchers working on the development of electrodes for PCFCs. |
| Starting Page | 3407 |
| e-ISSN | 20763417 |
| DOI | 10.3390/app11083407 |
| Journal | Applied Sciences |
| Issue Number | 8 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-04-10 |
| Access Restriction | Open |
| Subject Keyword | Applied Sciences Electrochemistry Yttrium-doped Barium Cerate (bcy) Short-circuiting Ruddlesden-popper Lanthanide Nickelate Proton Ceramic Fuel Cell (pcfc) |
| Content Type | Text |
| Resource Type | Article |
