H2S Solid oxide fuel cell based on a modified Barium cerate perovskite proton conductor |
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Authors: | Wen-yi Tan Qin Zhong Ming-sheng Miao Hong-xia Qu |
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Institution: | (1) School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing, 210094, Jiangsu, China;(2) Department of Environment Engineering, Nanjing Institute of Technology, Nanjing, 211167, Jiangsu, China |
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Abstract: | Urea combustion method was adopted to prepare precursor powder, MCeO3 doped with Zr (M is alkaline earth element, such as barium, strontium, and calcium). The precursor powder has typically perovskite
structure after being calcined at 873 K. In 773 K∼1,273 K, BaCe0.425Zr0.475Y0.1O3 has the highest conductivity above 10−2 S cm−1 and good chemical stability, while the phase transition may exist in H2S atmosphere for the proton conductors. In the single fuel cell composed of MoS2-BaCe0.425Zr0.475Y0.1O3-σ-Ag with BaCe0.425Zr0.475Y0.1O3-σ as electrolyte, the best performance is obtained. The open circuit voltage of fuel cell is all about 0.72 V, the max power
density, 1.55 mW cm−2. The performance drop is attributed to ohmic loss resulting from the separation of electrolyte and electrode, and improvement
is required to bring out new anode materials compatible to the proton conductor, BaCe0.425Zr0.475Y0.1O3-σ, as electrolyte. |
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Keywords: | Hydrogen sulfide Solid oxide fuel cell Proton conductor |
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