PrBaCo2-xTaxO5+δ based composite materials as cathodes for proton-conducting solid oxide fuel cells with high CO2 resistance. (6th November 2020)

• Record Type: Journal Article
• Authors: Wang, Di; Xia, Yunpeng; Lv, Huanlin; Miao, Lina; Bi, Lei; Liu, Wei
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 55(2020)
• Page Start: 31017
• Page End: 31026
• Publication Date: 2020-11-06
• Subjects: SOFC -- Cathode -- CO2 resistance -- Tantalum-doping; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.08.094
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: PrBaCo2 O5+δ (PBC) with high catalytic activity is identified as a prospective cathode material for intermediate temperature solid oxide fuel cells (IT-SOFCs). However, its poor chemical stability hinders its application. To address this problem, a Ta-doping strategy was presented in this study. The cathode with Ta-doping PBC was applied in proton conducting SOFCs. And the influence of Ta-doping on the crystal structure, electrochemical performance, structure stability and electrical conductivity of PBC was investigated. The resistance to CO2 of PBC at elevated temperature is significantly improved with Ta-doping. The electrochemical performance measurements indicated that a low Ta-doping concentration did not change the performance of the cells obviously, while large Ta-doping concentration could lower the fuel cell performance. Highlights: Tantalum element was successfully doped into the crystal lattice of PBC. Ta-doped PBC was successfully applied in H–SOFC. The resistance to CO2 of PBC at elevated temperature is significantly improved with Ta-doping.