Multi-phase solid in and electronic conduction, membrane having low radio of electronic conducting phase and prepn method thereof


Application Number: 00108383
Application Date: 2000.02.01
Publication Number: 1305864
Publication Date: 2001.08.01
Priority Information: 2000/1/20 US 09/488992
International: B01D71/02;H01M4/94
Applicant(s) Name: Praxair Tech, Inc
Address:
Inventor(s) Name: Chen Jiecheng;C.J. Bisack;R. Plasad
Patent Agency Code: 72001
Patent Agent: wei jinxi
Abstract A multi-phase solid electrolyte ion transport membrane comprising at least two phases wherein one of the phases comprises an oxygen ion single conductive material. The other phase comprises an electronically-conductive metal or metal oxide conducting phase is present in a low volume percentage. One method for achieving this result incorporates the minority phase into the powder from which the membrane is made by deposition of the metal or metal oxide from a polymer made by polymerizing a chelated metal dispersion in a polymerizable organic monomer or prepolymer. The multi-phase composition advantageously comprises a first phase of a ceramic material and a second phase of a metal or metal oxide bound to a surface of the ceramic material. A second method fabricates the membrane from a mixture of two powders one of which contains a mixture of the two phases.