Origin of high electrical conductivity in alkaline-earth doped LaCoO3

Hisashi Kozuka; Katsuya Yamagiwa; Kazushige Ohbayashi; Kunihito Koumoto

doi:10.1039/C2JM31965A

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Journal of Materials Chemistry

Issue 22, 2012

Journal of Materials Chemistry was published between 1991 and 2012. From issue 1, 2013, it was replaced by three new journals: Journal of Materials Chemistry A, B and C

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Origin of high electrical conductivity in alkaline-earth doped LaCoO₃

Hisashi Kozuka,*^a^b Katsuya Yamagiwa,^a Kazushige Ohbayashi^a and Kunihito Koumoto^b

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NGK SPARK PLUG CO., LTD., 2808, Iwasaki, Komaki-shi, Japan
E-mail: h-kozuka@mg.ngkntk.co.jp ;
Fax: +81 568 76 5274 ;
Tel: +81 568 76 1362

Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho Chikusa-ku, Nagoya 464-8603, Japan

J. Mater. Chem., 2012,22, 11003-11005

DOI: 10.1039/C2JM31965A
Received 29 Mar 2012, Accepted 27 Apr 2012
First published online 30 Apr 2012

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Alkaline-earth doped LaCoO₃ has been found to be promising as conductive oxides instead of standard metals for use as electrodes. Electrical conductivity has a maximum, σ = 4.4 × 10³ S cm⁻¹, in La_0.6Sr_0.4CoO₃. We believe that the increase in mobility was caused by the decrease in the Co–O bond length.

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