Effectively Enhanced Oxygen Reduction Activity and Stability of Triple-conducting Composite Cathodes by Strongly Interacting Interfaces for Protonic Ceramic Fuel Cells
Effectively Enhanced Oxygen Reduction Activity and Stability of Triple-conducting Composite Cathodes by Strongly Interacting Interfaces for Protonic Ceramic Fuel Cells
复制标题
通过强相互作用界面有效增强质子陶瓷燃料电池三导复合阴极的氧还原活性和稳定性
DOI：
10.1016/j.cej.2023.142056
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发表时间：
2023
影响因子：
15.1
通讯作者：
Koichi Eguchi
中科院分区：
文献类型：
--
作者：
Wenwen Zhang;Hiroki Muroyama;Yuichi Mikami;Qingshi Liu;Xiaojuan Liu;Toshiaki Matsui;Koichi Eguchi
这里，通过用BaCo0.7(Ce0.8Y0.2)0.3O3−δ(BCCY)中的锆代替铈来构建强相互作用界面，开发了一种用于质子陶瓷燃料电池的新型三导电复合阴极，具有优异的氧还原反应(ORR)活性和稳定性。一步合成的BaCo0.7(Zr0.8Y0.2)0.3O3−δ(BCZY)由具有不同功能的多个相组成，在600℃下达到0.25Ωcm2的极化电阻，同时在206小时内稳定保持优异的性能。优异的ORR活性归因于高浓度的活性位点以及通过Co和Zr的相互扩散引入的富Co和富Zr相的强相互作用界面处的强水化能力。低热膨胀系数也是通过该界面实现的，这有助于BCZY具有出色的稳定性。这项研究强调了强相互作用界面在增强材料的ORR活性和稳定性方面的作用，并为开发三导电复合阴极提供了新策略。
Here, a novel triple-conducting composite cathode for protonic ceramic fuel cells, with superior oxygen reduction reaction (ORR) activity and stability, is developed by replacing cerium with zirconium in BaCo0.7(Ce0.8Y0.2)0.3O3−δ(BCCY) to construct strongly interacting interfaces. The one-step synthesized BaCo0.7(Zr0.8Y0.2)0.3O3−δ(BCZY) is composed of multiple phases with different functionalities, reaching a polarization resistance of 0.25 Ω cm2at 600 °C while maintaining excellent performance stably for 206 h. The excellent ORR activity is attributed to the high concentration of active sites and the strong hydration capability at strongly interacting interfaces of Co-rich and Zr-rich phases which is introduced by the interdiffusion of Co and Zr. The low thermal expansion coefficient is also achieved through this interface, contributing to the excellent stability of BCZY. This study highlights the role of strongly interacting interfaces in enhancing the ORR activity and stability of materials and provides a new strategy for developing triple-conducting composite cathodes.