Effect of a (La,Sr)2CoO4 phase on the oxygen exchange reaction of dense and porous (La,Sr)CoOj electrodes

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

Promotion of oxygen exchange rate on La0.6Sr0.4CoO3-delta; (LSC) by the coexistence of the Ruddlesden-Popper phase was investigated for dense film and porous electrodes. Application of a porous (La,Sr)2CoO4 (LSC214) layer on a dense film electrode increased the reaction rate and decreased the activation energy. The oxygen reaction rate on a bare LSC varied from sample to sample, suggesting strong effect of the surface chemistry such as Sr segregation. On the other hand, the electrode modified with a LSC214 layer showed less dependence. The presence of an LSC214 phase appeared to suppress the Sr segregation, which accounts for the improvement of the reaction rate. In contrast to dense electrodes, porous electrodes showed no significant improvement with addition of LSC214. From the estimation of the effective utilization length, the surface reaction rate of a porous electrode was much higher than that on a dense electrode, which may influence the different effect observed by addition of LSC214 in dense and porous electrodes.

本文言語English
ホスト出版物のタイトルSolid-Gas Electrochemical Interfaces 2 - SGEI 2
編集者S. Adler, E. Ivers-Tiffee, B. Yildiz, T. Kawada
出版社Electrochemical Society Inc.
ページ9-14
ページ数6
10
ISBN(電子版)9781607685395
DOI
出版ステータスPublished - 2017 1 1
イベントSymposium on Solid-Gas Electrochemical Interfaces 2, SGEI 2017 - 231st ECS Meeting 2017 - New Orleans, United States
継続期間: 2017 5 282017 6 1

出版物シリーズ

名前ECS Transactions
番号10
77
ISSN(印刷版)1938-5862
ISSN(電子版)1938-6737

Other

OtherSymposium on Solid-Gas Electrochemical Interfaces 2, SGEI 2017 - 231st ECS Meeting 2017
CountryUnited States
CityNew Orleans
Period17/5/2817/6/1

ASJC Scopus subject areas

  • Engineering(all)

フィンガープリント 「Effect of a (La,Sr)<sub>2</sub>CoO<sub>4</sub> phase on the oxygen exchange reaction of dense and porous (La,Sr)CoOj electrodes」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル