Gas diffusion electrode with a hydrophilic covering layer, and process for its production

US4563261A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Rudolf Staab · Kelkheim, DE
• Jurgen Russow · Kelkheim, DE

Key dates

• Filing date: Sep 6, 1984
• Grant date: Jan 7, 1986
• Expiry date: Sep 6, 2004

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/50
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A gas diffusion electrode for the reduction of oxygen, which contains a hydrophobic electro-catalyst layer, is described. One side of this layer is covered with a hydrophilic layer which is composed of at least one transition metal or an oxide or mixed oxide of transition metals and can also contain a current collector in the form of a mesh. For producing the gas diffusion electrode, a hydrophobic electro-catalyst layer can first be prepared from a pulverulent mixture which contains the electro-catalyst and a hydrophobic polymer, and at least one transition metal or an oxide or mixed oxide of transition metals can be applied in a finely divided form to one side of this layer and bonded to the hydrophobic electro-catalyst layer by the application of pressure.