Chemically stable BaZr0.7Pr0.1Y0.2O3-δ-BaCe0.8Y0.2O3-δ bilayer electrolyte for intermediate temperature solid oxide fuel cells. (1st January 2015)

• Record Type: Journal Article
• Authors: Qian, Jing; Sun, Wenping; Shi, Zhen; Tao, Zetian; Liu, Wei
• Is Part Of: Electrochimica acta. Volume 151(2015)
• Page Start: 497
• Page End: 501
• Publication Date: 2015-01-01
• Subjects: pulsed laser deposition -- proton-conducting -- chemical stability -- electrochemical performance; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2014.11.071
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: Fabricate thin BZPY layer on BCY half-cell with pulsed laser deposition. The bilayer electrolyte improves chemical stability against CO2 atmosphere. The bilayer electrolyte cell shows a good electrochemical performance. The bilayer cell exhibits a good long-term stability under cell testing condition. Abstract: A thin BaZr0.7 Pr0.1 Y0.2 O3-δ (BZPY) layer (∼3.3 μm) is fabricated on anode-supported BaCe0.8 Y0.2 O3-δ (BCY) electrolyte layer (∼28 μm) with pulsed laser deposition (PLD) technique. The BZPY/BCY bilayer electrolyte shows better chemical stability against CO2 atmosphere compared with the BCY single electrolyte layer. The open circuit voltages (OCVs) of 0.966, 0.997 and 1.021 V with maximum power densities of 250, 177, 122 mW cm −2 are measured in the bilayer electrolyte cell at 700, 650 and 600 °C, respectively. Besides, the BZPY/BCY bilayer electrolyte cell also exhibits a good long-term stability under the operating condition. BZPY thin film deposited with PLD technique can improve chemical stability with little effect on the electrochemical performance of proton-conducting SOFC.