Mixed ionic-electronic conducting composites for oxygen separation and electrocatalysis

US5616223A · kind A · utility

Assignee

• Gas Research Institute · US

Inventors

• Yousheng Shen · Salt Lake City, US
• Ashok V. Joshi · Salt Lake City, US
• Kevin Krist · Palatine, US
• Meilin Liu · Norcross, US
• Anil V. Virkar · Salt Lake City, US

Key dates

• Filing date: Apr 22, 1994
• Grant date: Apr 1, 1997
• Expiry date: Apr 22, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/50
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Composite ceramic mixed ionic and electronic conducting materials having high ambipolar activity which can be fabricated into thin membranes for high efficiency oxygen separation from air at intermediate temperatures. The mixed conducting materials have composite non-homogeneous microstructures of a separate predominantly oxygen ion conductive phase and a predominantly electronic conductive phase. Preferred predominantly oxygen ion conducting phases include bismuth, cerium and zirconium oxide based materials and predominantly electronic conducting phases include at least one metal electronic conductor material.