Method for forming a composite metal oxide and method for manufacturing an electrode using the same

摘要

A method for forming a fine powder of a composite metal oxide, for example a perovskite of formula LaM'M''O3, where M' represents an alkaline earth metal, and M'' represents a transition metal comprises mixing a solution which includes at least two metal ions with at least one of polyvinyl alcohol, polyvinyl butyral or polyethylene glycol. A sol is formed which may then be dried to produce a gel which, in turn, may be calcined to produce powder. The powder may be cast and sintered in order to produce a fuel cell electrode which has a large specific surface area.