Highly Efficient CuCo2O4 Decorated Er0.4Bi1.6O3 Nanostructured Cathode for Intermediate Temperature Solid Oxide Fuel Cells. Issue 21 (6th June 2019)

• Record Type: Journal Article
• Authors: Kong, Yu; Sun, Chengzhi; Wu, Xian; Zhang, Yu; Zhang, Naiqing; Sun, Kening
• Is Part Of: ChemistrySelect. Volume 4:Issue 21(2019)
• Page Start: 6606
• Page End: 6613
• Publication Date: 2019-06-06
• Subjects: Solid oxide fuel cell cathode -- nanostructured electrode -- CuCo2O4-decorated-Er0.4Bi1.6O3; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201901137
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: The cathode efficiency for intermediate temperature solid oxide fuel cells is largely limited by the catalytic activity for oxygen reduction reaction. Here by, we design and synthesize CuCo2 O4 decorated Er0.4 Bi1.6 O3 cathode by means of a simple gelation method and then screen‐print it on scandium‐stabilized zirconia electrolyte cell followed by a relatively lower temperature sintering process. The decoration of CuCo2 O4 adequately enhances the electro‐catalytic activity of the composite cathode for the ORR. In addition, Er0.4 Bi1.6 O3 matrix also reduces the sintering temperature (from 1000 °C to 850 °C) compared to the pristine CuCo2 O4 electrode. The CuCo2 O4 ‐decorated‐Er0.4 Bi1.6 O3 composite cathode demonstrates a lower polarization resistance (0.016 Ω cm 2 at 800 °C) in air, exhibiting an 87% decrease in comparison to the primary CuCo2 O4 cathode. Abstract : The special CuCo2 O4 ‐decorated‐Er0.4 Bi1.6 O3 structure could guarantee that surface facilitates the electronic conducting and electrochemical catalysis from CuCo2 O4 spinel, and the bulk favor the ionic conducting from ESB matrix, as well as the TPBs can be more expanded. The CuCo2 O4 ‐d‐ESB composite cathode demonstrates a lower polarization resistance (0.016 Ω cm 2 at 800 °C) in air, with a reduced sintering temperature (from 1000 °C to 850 °C).