DataVXChemistry of MaterialsPaper
journal article·2011-11-22

Oxygen-Deficient Perovskite Sr0.7Y0.3CoO2.65−δ as a Cathode for Intermediate-Temperature Solid Oxide Fuel Cells

Yan Li, Young N. Kim, Jinguang Cheng, José A. Alonso, Zhiwei Hu, Yi-Ying Chin, Tsuyoshi Takami, Maria T. Fernández-Díaz, Hong-Ji Lin, Chien-Te Chen, Liu H. Tjeng, Arumugam Manthiram, John B. Goodenough

Chemistry of Materials· Volume 23· Issue 22
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Source abstract

Abstract

The oxygen-deficient perovskite Sr 0.7 Y 0.3 CoO 2.65−δ contains Co2O 6/2 (001) planes alternating with oxygen-deficient Co1O 1.15-δ planes having 0.15−δ O4 oxygen in the plane capping tetrahedral site Co1. With ordering of the O4 atoms below 300 °C, the oxide exhibits n-type polaronic conduction associated with localized high-spin 3d electronic configurations on Co 2+ in Co1 sites; a transition to itinerant-hole conduction occurs on disordering of O4 ions over the range 350 < T < 600 °C. Above 600 °C, Sr 0.7 Y 0.3 CoO 2.65−δ is a mixed oxide-ion/electronic conductor exhibiting good activity for the oxygen-reduction reaction, which makes it a competitive cathode material for an intermediate-temperature solid oxide fuel cell.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storageElectronic materials

OpenAlex topics: Advancements in Solid Oxide Fuel Cells · Magnetic and transport properties of perovskites and related materials · Electronic and Structural Properties of Oxides

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Materials Science and Engineering Program and Department of Mechanical Engineering, University of Texas at Austin, Texas 78712, United States

College of Physical Science and Technology, Heilongjiang University, Harbin 150080, China

Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, E-28049 Madrid, Spain

Max Planck Institute for Chemical Physics of Solids, Nöthnitzerstr, 40, D-01187 Dresden, Germany

Department of Physics, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan

Institut Laue Langevin, BP 156X, Grenoble, F-38042, France

National Synchrotron Radiation Research Center, HsinChu 30077, Taiwan

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