An investigation of LaNi1-xFexO3 as a cathode material for solid oxide fuel cells

被引：291

作者：

Chiba, R ^{[1
]}

Yoshimura, F ^{[1
]}

Sakurai, Y ^{[1
]}

机构：

[1] NTT, Integrated Informat & Energy Syst Labs, Tokai, Ibaraki 3191193, Japan

来源：

SOLID STATE IONICS | 1999年 / 124卷 / 3-4期

关键词：

conductivity; perovskite; oxide; thermal expansion; SOFC;

D O I：

10.1016/S0167-2738(99)00222-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We prepared La(Ni-M)O-3 (M Al, Cr, Mn, Fe, Co, Ga) samples and investigated their characteristics as solid oxide fuel cell (SOFC) cathode materials. We found that the LaNi1-xFeXO3 satisfies the important requirements for a cathode, if x in this system is around 0.4. This system has its highest electronic conductivity of 580 S/cm at 800 degrees C, when x in LaNi1-xFexO3 is 0.4. This value is more than three times higher than that of La0.8Sr0.2MnO3 (180 S/cm). The average thermal expansion coefficient of LaNi0.6Fe0.4O3 from 30 to 1000 degrees C is relatively low (11.4 x 10(-6) K-1) and closer to the 0.92 ZrO2-0.08 Y2O3 (YSZ) value (10.0 x 10(-6) K-1) than La0.8Sr0.2MnO3 (12.0 x 10(-6) K-1). (C) 1999 Published by Elsevier Science B.V. All rights reserved.

引用

页码：281 / 288

页数：8

共 20 条

[1]

Chiba R, 1998, MATER RES SOC SYMP P, V496, P185

[2] Ionic conductivity and morphology in Sc2O3 and Al2O3 doped ZrO2 films prepared by the sol-gel method [J].

Chiba, R ;

Yoshimura, F ;

Yamaki, J ;

Ishii, T ;

Yonezawa, T ;

Endou, K .

SOLID STATE IONICS, 1997, 104 (3-4) :259-266

[3]

Chiba R., 1995, Proceedings of the Fourth International Symposium on Solid Oxide Fuel Cells (SOFC-IV), P482

[4]

Chiba R, 1997, 23 S SOL STAT ION JA, V2A06, P91

[5] AN ELECTRON-MICROSCOPE INVESTIGATION OF PHASES IN THE SYSTEM LA-NI-O [J].

DRENNAN, J ;

TAVARES, CP ;

STEELE, BCH .

MATERIALS RESEARCH BULLETIN, 1982, 17 (05) :621-626

[6] Crystal structure refinement and stability of LaFexNi1-xO3 solid solutions [J].

Falcon, H ;

Goeta, AE ;

Punte, G ;

Carbonio, RE .

JOURNAL OF SOLID STATE CHEMISTRY, 1997, 133 (02) :379-385

[7] Characterisation of LaNi1-xCoxO3 as a possible SOFC cathode material [J].

Hrovat, M ;

Katsarakis, N ;

Reichmann, K ;

Bernik, S ;

Kuscer, D ;

Holc, J .

SOLID STATE IONICS, 1996, 83 (1-2) :99-105

[8] STRUCTURAL PHASE-TRANSITION AND IONIC-CONDUCTIVITY IN 0.88ZRO(2)-(0.12-X)SC2O3-X-AL2O3 [J].

ISHII, T .

SOLID STATE IONICS, 1995, 78 (3-4) :333-338

[9]

Ishii T., 1993, Proceedings of the Third International Symposium on Solid Oxide Fuel Cells, P59

[10]

KING HW, 1986, J CAN CERAM SOC, V55, P10

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