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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/49933

Title: Preparation and performance of PrLaNiO4 and (La0.75Sr0.2Ba0.05)0.175Ce0.825O1.891 composite cathode material by solid state reaction for IT-SOFCs
Authors: Te-Wei Chiua
Ming-Xian Lin
Heng-Yi Shih
Bae-yinn Hwang
Horng-Yi Chang
Yao-Ming Wang
Contributors: 國立臺灣海洋大學:輪機工程學系
Date: 2017-08
Issue Date: 2018-09-04T01:04:16Z
Publisher: Ceramics International
Abstract: Abstract: Pr2NiO4 is one of the compounds in the Ln2NiO4 (Ln=Pr, La and Nd) group that exhibits the Ruddlesden-Poppor structure. The present research substituted this compound by lanthanum (La) to enhance chemical stability, because of the decomposition reaction of Pr2NiO4 for long-term operation. PrLaNiO4 powders were then synthesized using a solid state reaction method for the application of cathode materials in an intermediate-temperature solid oxide fuel cell (IT-SOFC); these material properties were then examined by XRD, SEM, thermomechanical analysis, alternating current impedance spectroscopy, and electrochemical analysis. The crystallization of the as-prepared PrLaNiO4 was obtained after heat-treatment at 1200 °C for 6 h. Moreover, PrLaNiO4 cathode material demonstrated favorable chemical stability with the electrolyte of (La0.75Sr0.2Ba0.05)0.175Ce0.825O1.891 (LSBC) under 1200 °C for 6 h. The determined thermal expansion coefficient of PrLaNiO4 was 14.1 × 10⁻⁶ K⁻¹. Furthermore, to reduce their resistance the PrLaNiO4 powders were mixed with various wt% of LSBC. The maximal power density of PrLaNiO4−5 wt% LSBC is 606 mW/cm² operated at 800 °C in air, which also exhibited lower area-specific resistance of 0.202 Ω cm². The study concludes that the PrLaNiO4−5 wt% LSBC is a better choice than Pr2NiO4 in cathode material for IT-SOFCs.
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/49933
Appears in Collections:[輪機工程學系] 期刊論文

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