Analysis of electrical conduction mechanism of LaNi1-xMe xO3-δ (Me = Fe, Mn)

Eiki Niwa, Hiroki Maeda, Chie Uematsu, Takuya Hashimoto

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

3 被引用数 (Scopus)

抄録

Electrical conduction mechanism of LaNi1-xFexO 3-δ and LaNi1-xMnxO3+δ, which are expected as Sr-free new cathode material for solid oxide fuel cells, was analyzed using electrical conductivity measurements at high temperatures. Electrical conduction behaviors of both specimens can be well fitted into small polaron hopping conduction model. The electrical conductivity of LaNi 1-xFexO3-δ increased with increasing Ni content, showing agreement with decrease of activation energy for hopping conduction. Almost constant activation energy irrespective of sintering temperature indicated that observed activation energy can be attributed to intraparticle conduction. The decrease of electrical conductivity and increase of activation energy of LaNi1-xMnxO3+δ were observed with increasing Ni content for 0.6≥x≥1.0. Further Ni substitution increased electrical conductivity and decreased activation energy for 0.4≥x≥0.6. It can be suspected that the origin of the difference of electrical conduction behavior of LaNi1-xFexO 3-δ and LaNi1-xMnxO3+δ is difference of energy level of eg band composed of Fe 3d or Mn 3d orbitals and their overlapping quantity with O 2p and Ni 3d band.

本文言語英語
ホスト出版物のタイトルSolid State Ionic Devices 9 - Ion Conducting Thin Films and Multilayers
出版社Electrochemical Society Inc.
ページ117-124
ページ数8
27
ISBN(印刷版)9781607684152
DOI
出版ステータス出版済み - 2013
外部発表はい
イベント9th Solid State Ionic Devices Sympsoium - 22nd ECS Meeting - Honolulu, HI, 米国
継続期間: 10月 7 201210月 12 2012

出版物シリーズ

名前ECS Transactions
番号27
50
ISSN(印刷版)1938-5862
ISSN(電子版)1938-6737

その他

その他9th Solid State Ionic Devices Sympsoium - 22nd ECS Meeting
国/地域米国
CityHonolulu, HI
Period10/7/1210/12/12

!!!All Science Journal Classification (ASJC) codes

  • 工学(全般)

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