Novel BaBi0.05Co0.8Nb0.15O3−δ perovskite oxide as cathode material for intermediate-temperature solid oxide fuel cells. (8th June 2015)

• Record Type: Journal Article
• Authors: Meng, Xiangwei; Long, Guohui; Liu, Shouxiu; Ji, Yuan; Pang, Mingjun; Wang, Biao; Lü, Shiquan; Yang, Jinghai
• Is Part Of: International journal of hydrogen energy. Volume 40:Number 21(2015)
• Page Start: 6935
• Page End: 6941
• Publication Date: 2015-06-08
• Subjects: Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2015.04.019
• Languages: English
• ISSNs: 0360-3199

Abstract

<abstract xml:lang="en" abstract-type="author" id="abs0010"> <title id="sectitle0010">Abstract</title> <sec> <p id="abspara0010">A cubic perovskite oxide, BaBi_0.05Co_0.8Nb_0.15O_3−δ (BBCN) is investigated as a cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs). XRD results show that BBCN cathode is chemically compatible with the electrolyte Sm_0.2Ce_0.8O_1.9 (SDC) at 950 °C for 5 h. The XPS results show that the Co³⁺/Co⁴⁺, Nb⁵⁺, Bi³⁺ and Ba²⁺ species exist in the BBCN sample. The thermal expansion coefficient (TEC) of the BBCN sample is 19.60 × 10⁻⁶ K⁻¹ between 30 and 850 °C in air. The <italic>R</italic>_p of BBCN cathode on SDC electrolyte is 0.047, 0.077 and 0.136 Ω cm² at 800, 750, 700 °C, respectively. A maximum power density of 507 mW cm⁻² is obtained at 800 °C for single-cell with 300 μm thick SDC electrolyte and BBCN cathode. The results of this study demonstrate that BBCN can be a promising cathode material for IT-SOFCs.</p> </sec> </abstract>