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| Content Provider | Springer Nature Link |
|---|---|
| Author | Tomov, R. I. Mitchell Williams, Tom Gao, Chenlong Kumar, R. V. Glowacki, B. A. |
| Copyright Year | 2017 |
| Abstract | The effect of solid oxide fuel cell cathode microstructure modification on its electrochemical activity is investigated. Inkjet printing infiltration was used to develop a nano-decoration pattern on the composite cathode scaffolds. Two types of composite La$_{0.6}$Sr$_{0.4}$Co$_{0.2}$Fe$_{0.8}$O$_{3−δ}$:Ce$_{0.9}$Gd$_{0.1}$O$_{1.9}$ cathodes with different volume ratios (60:40 and 40:60 vol%) were fabricated using inkjet printing of suspension inks. The electrodes were altered by single-step inkjet printing infiltration of ethanol-based Ce$_{0.9}$Gd$_{0.1}$O$_{1.9}$ ink. After heat treatments in air at 550 °C the cathodes’ surfaces were shown to be nano-decorated with Ce$_{0.9}$Gd$_{0.1}$O$_{1.9}$ particles (~20–120 nm in size) dispersed uniformly onto the electrode scaffold. The nano-engineered microstructure enhanced the active triple phase boundary of the electrode and promoted the surface exchange reaction of oxygen. Electrochemical impedance tests conducted on symmetrical cells showed a reduction in the polarization resistance of between 1.3 and 2.9 times. The effect was found to be more pronounced in the 60:40 vol% composite cathodes. Ageing of infiltrated electrodes up to 60 h in air revealed enhanced stability of gadolinium doped ceria nanoparticles decorated electrodes ascribed to the suppression of SrO surface segregation. This work demonstrated that single-step inkjet printing infiltration can produce reproducible performance enhancements and thus offers a cost-effective route for commercial solid oxide fuel cell infiltration processing. |
| Starting Page | 641 |
| Ending Page | 651 |
| Page Count | 11 |
| File Format | |
| ISSN | 0021891X |
| Journal | Journal of Applied Electrochemistry |
| Volume Number | 47 |
| Issue Number | 5 |
| e-ISSN | 15728838 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2017-03-27 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Inkjet printing Infiltration Lanthanum strontium cobaltite ferrite Doped ceria Solid oxide fuel cells Electrochemistry Physical Chemistry Industrial Chemistry/Chemical Engineering |
| Content Type | Text |
| Resource Type | Article |
| Subject | Materials Chemistry Chemical Engineering Electrochemistry |
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