CHEN Zhiyi 1, YUE Zhongwei 1, AI Na 2, JIANG Sanping 3, CHEN Kongfa 1
(1. College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, Fujian, China; 2. Fujian CollegeAssociation Instrumental Analysis Center, Fuzhou University, Fuzhou 350108, Fujian, China; 3. Foshan Xianhu Laboratoryof the Advanced Energy Science and Technology Guangdong Laboratory, Foshan 528216, Guangdong, China)
Abstract: Conventional high-temperature sintered electrodes (1000–1250 ℃) suffer from various problems, such as interfacial reaction and microstructural coarsening. Recent studies indicated that the electrode/electrolyte interface of directly assembled electrodes can be formed in situ through electrochemical polarization at ≤800 ℃. Since it does not undergo high temperature sintering process, the direct assembly method enables the utilization of a variety of high-performance air electrode materials on barrier-layer-free yttria-stabilized zirconia electrolyte, thus opening new avenues for the application of low-melting and nanostructured electrode materials. The origin and the latest research progress of electrodes fabricated by direct assembly approach are outlined.
Key words: reversible solid oxide cells; direct assembly approach; nanostructured electrodes; polarization induced interface;
electrode/electrolyte interface stability