報告書番号

W01028

タイトル（和文）

SOFC用YSZ支持形燃料極材料の適正化(2) -－原料粉末粒径の最適化－-

タイトル（英文）

Optimization of YSZ-supported anode materials for SOFC(2) -Clarification on particle sizes of the anode materials-

概要 （図表や脚注は「報告書全文」に掲載しております）

当所では、SOFC用燃料極材料としてYSZ支持形構造を有する材料を提案し、これまでに粒径一定材料の適用可能な混合比を明らかにしたが、粒径比についての最適化は未着手であった。本研究では、粒径比についての検討結果とともに適用の可能性が高いと判断された材料の電極性能評価を実施し、最も優れた材料を明確にした。本書では、これらの結果について報告する。

概要 （英文）

Ni-YSZ cermets are generally used as anode in solid oxide fuel cells (SOFC). In previous papers, the authors proposed a new concept concerning on the microstructure of anodes, referred to as 党YSZ-supported anodes媒. A feature of this concept is that YSZ powders are divided into two kinds, coarse and fine. An electrical generation test with single cells applied the YSZ-supported anodes revealed improved long-term stability, and then the optimal mixture ratios of three powders was clarified by a reduction test and electrical conductivity measurements. In this study, the test and measurements were carried out to clarify the optimal ratios of the particle sizes, similarly. Samples were prepared with varying ratios of the particle sizes. The particle sizes of NiO were more effective in forming the stable microstructure than that of the other powder. It is also found that the electrode performance of the anode, which the sizes of the coarse YSZ, NiO and fine YSZ are in the ratios 27:1:0.4, is more excellent than that of the other samples.

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