A highly conductive Ce0.8Nd0.2O1.9 electrolyte with double sintering aids for intermediate-temperature solid oxide fuel cells. Issue 18 (15th September 2022)

• Record Type: Journal Article
• Authors: Tang, Ping; Zhou, De-Feng; Zhu, Xiao-Fei; Wang, Ning; Bai, Jing-He
• Is Part Of: Ceramics international. Volume 48:Issue 18(2022)
• Page Start: 26476
• Page End: 26486
• Publication Date: 2022-09-15
• Subjects: Solid oxide fuel cells -- Ce0.8Nd0.2O1.9 -- Electrolyte materials -- Long-term stability -- Double sintering aids; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.05.342
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this paper, the influence of Bi/Zn mass ratio on the phase composition, microstructure, sintering properties, and electrical properties of Bi/Zn co-added Nd0.2 Ce0.8 O1.9 (NDC) used for intermediate-temperature solid oxide fuel cells (SOFCs) was investigated. At 700 °C, the total conductivity of the NDC-based electrolyte (3Bi/1Zn-NDC) with the mass ratio 3:1 for Bi2 O3 and ZnO was as high as 5.89 × 10 −2 S cm −1, 4.60 and 4.51 times higher than the single addition of 4 wt% Bi2 O3 and 4 wt% ZnO, respectively. In addition, the 3Bi/1Zn-NDC electrolyte exhibited a good physical and chemical compatibility with the electrode materials. The open circuit voltage (OCV) of the cell supported by the 3Bi/1Zn-NDC electrolyte was 0.67 V, and the output power density could reach 402.25 mW cm −2 at 700 °C. It showed stable power output and OCV in the long-term stability test within 50 h. Overall, the combination of 3 wt% Bi2 O3 and 1 wt% ZnO was a very effective dual sintering aid for NDC electrolyte.