In situ Studies of Phase Evolution in (Pr1-xNdx)(2)NiO4 Electrodes with Various Interlayer Chemistries
文献类型：会议论文
| 作者 | Dogdibegovic, Emir; Alabri, Nawf S.; Wright, Christopher J.; Hardy, John S.; Coyle, Christopher A.; Horlick, Samuel A.; Guan, Wanbing; Stevenson, Jeffry W.; Zhou, Xiao-Dong |
| 出版日期 | 2017 |
| 会议日期 | JUL 23-28, 2017 |
| 关键词 | OXIDE FUEL-CELLS ELECTROCHEMICAL PERFORMANCE STABILITY OXYGEN DIFFUSION CATHODES KINETICS |
| 卷号 | 78 |
| 期号 | 1 |
| DOI | 10.1149/07801.0623ecst |
| 英文摘要 | This study is to complement our another paper in this ECS Transactions volume on the role of interlayer on activity and performance stability in praseodymium nickelates. That paper showed a remarkable 48% increase in power density while switching from common GDC interlayer to a new interlayer chemistry (PGCO). Furthermore, a stable long-term performance was linked with suppressed reaction between the cathode and PGCO interlayer. In this paper, we report in situ studies of the phase evolution. The high energy XRD studies at a synchrotron source showed fully suppressed phase transition in praseodymium nickelates with PGCO interlayer, while the electrodes with GDC interlayer undergo substantial phase transformation. Furthermore, in operando and post XRD analyses showed fully suppressed structural changes in electrodes operated in full cells at 750 degrees C and 0.80 V for 500 hours. SEM-EDS analysis showed that the formation of PrOx at the cathode-interlayer interface may play a role in a decrease of mechanical integrity of the interfaces, due to thermal expansion mismatch, leading to a local stress between the two phases. Consequently, phase evolution at a narrow interface may propagate towards the electrode bulk, leading to structural changes and performance degradation. |
| 会议录出版者 | ECS Transactions |
| 学科主题 | Electrochemistry ; Energy & Fuels |
| ISSN号 | 1938-5862 |
| ISBN号 | 978-1-60768-815-0 |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/23367]  |
| 专题 | 会议专题 会议专题_会议论文 |
| 推荐引用方式 GB/T 7714 | Dogdibegovic, Emir,Alabri, Nawf S.,Wright, Christopher J.,et al. In situ Studies of Phase Evolution in (Pr1-xNdx)(2)NiO4 Electrodes with Various Interlayer Chemistries[C]. 见:. JUL 23-28, 2017. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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