Tarutin Artem P, Kasyanova Anna V, Vdovin Gennady K, Lyagaeva Julia G, Medvedev Dmitry A
Laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes, Institute of High Temperature Electrochemistry, 620990 Ekaterinburg, Russia.
Chemical Engineering Institute, Ural Federal University, 620002 Ekaterinburg, Russia.
Materials (Basel). 2022 Mar 15;15(6):2166. doi: 10.3390/ma15062166.
Protonic ceramic fuel cells (PCFCs) offer a convenient means of converting chemical energy into electricity with high performance and efficiency at low- and intermediate-temperature ranges. However, in order to ensure good life-time stability of PCFCs, it is necessary to ensure rational chemical design in functional materials. Within the present work, we propose new Ni-based perovskite phases of PrNiMO (where M = Co, Fe) for potential utilization in protonic ceramic electrochemical cells. Along with their successful synthesis, functional properties of the PrNiMO materials, such as chemical compatibility with a number of oxygen-ionic and proton-conducting electrolytes, thermal expansion behavior, electrical conductivity, and electrochemical behavior, were comprehensively studied. According to the obtained data, the Co-containing nickelate exhibits excellent conductivity and polarization behavior; on the other hand, it demonstrates a high reactivity with all studied electrolytes along with elevated thermal expansion coefficients. Conversely, while the iron-based nickelate had superior chemical and thermal compatibility, its transport characteristics were 2-5 times worse. Although, PrNiCoO and PrNiFeO represent some disadvantages, this work provides a promising pathway for further improvement of Ni-based perovskite electrodes.
质子陶瓷燃料电池（PCFCs）提供了一种在低温和中温范围内将化学能高效转化为电能的便捷方式。然而，为确保PCFCs具有良好的寿命稳定性，有必要在功能材料方面进行合理的化学设计。在本研究中，我们提出了用于质子陶瓷电化学电池的新型PrNiMO（其中M = Co、Fe）基镍酸盐相。随着它们的成功合成，对PrNiMO材料的功能特性进行了全面研究，例如与多种氧离子和质子传导电解质的化学兼容性、热膨胀行为、电导率和电化学行为。根据所得数据，含钴镍酸盐表现出优异的导电性和极化行为；另一方面，它与所有研究的电解质都表现出高反应性，同时热膨胀系数升高。相反，铁基镍酸盐虽然具有优异的化学和热兼容性，但其传输特性却差2至5倍。尽管PrNiCoO和PrNiFeO存在一些缺点，但这项工作为进一步改进镍基钙钛矿电极提供了一条有前景的途径。
