Ln1-xSrxMnO3 (Ln=La,Pr,Nd,Sm and Gd) as the Cathode Material for Solid Oxide Fuel Cells.

• Sakaki Yoshinori

  Department of Chemistry, Faculty of Engineering, Mie University

• Takeda Yasuo

  Department of Chemistry, Faculty of Engineering, Mie University

• Kato Ai

  Department of Chemistry, Faculty of Engineering, Mie University

• Imanishi Nobuyuki

  Department of Chemistry, Faculty of Engineering, Mie University

• Yamamoto Osamu

  Department of Chemistry, Faculty of Engineering, Mie University

• Hattori Masatoshi

  Electric Power R&D Center, Chubu Electric Power Company

• Esaki Yoshimi

  Electric Power R&D Center, Chubu Electric Power Company

Bibliographic Information

Other Title

• 電池・イオン導電性材料　　固体酸化物燃料電池のカソード材料としてのＬｎ１－ｘＳｒｘＭｎＯ３（Ｌｎ＝Ｌａ，Ｐｒ，Ｎｄ，Ｓｍ　ａｎｄ　Ｇｄ）
• コタイ サンカブツ ネンリョウ デンチ ノ カソード ザイリョウ ト シテ ノ Ln1-xSrxMnO3 Ln La Pr Nd Sm and Gd

Abstract

The perovskite type manganite systems, Ln_1-xSr_xMnO₃ (Ln=La, Pr, Nd, Sm and Gd; 0.0≤x≤0.5) were studied as the electrode materials for solid oxide fuel cells (SOFC) from the view point of applications to the co-firing process of the electrolyte and electrode at higher temperature. The reactivity tests with yttria-stabilized zirconia (YSZ), no reaction product appeared between the Ln_1-xSr_xMnO₃ perovskite and YSZ even at a high annealing temperature of 1400°C when the lanthanoid elements were Pr, Nd and Sm and the Sr content was around 30% (x=0.3). The adjustment of the thermal expansion rate of Ln_1-xSr_xMnO₃ to YSZ, around x=0.1-0.2 in La_1-xSr_xMnO₃, 0.3 in Pr_1-xSr_xMnO₃ and Nd_1-xSr_xMnO₃ and more than 0.4 in Sm_1-xSr_xMnO₃ and Gd_1-xSr_xMnO₃. The electrical conductivity reached to 200 S/cm at 1000°C for all Ln_0.7Sr_0.3MnO₃ systems. The polarization measurements as an air electrode showed no significant dependence on the kind of lanthanoid elements. In the point of the electrode activity, high electrical conductivity, and low reactivity and good compatibility with YSZ, Pr_0.7Sr_0.3MnO₃ and Nd_0.7Sr_0.3MnO₃ are considered to be the most suitable electrode materials for the co-firing process.

Journal

• Journal of the Japan Society of Powder and Powder Metallurgy

  Journal of the Japan Society of Powder and Powder Metallurgy 46 (3), 293-299, 1999

  Japan Society of Powder and Powder Metallurgy

Keywords

• cathode materials
• perovskite type oxide
• reactivity
• thermal expansion
• co-firing process

Details

• CRID: 1390282681285370880
• NII Article ID: 10002262103
• NII Book ID: AN00222724
• DOI: 10.2497/jjspm.46.293
• ISSN: 18809014
• ISSN: 05328799
• NDL BIB ID: 4690239
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4690239
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed