Method for the production of nickel oxide surfaces having increase conductivity

US8057713B2 · kind B2 · utility

Assignees

• UHDE GMBH · DE
• Gaskatel Gessellschaft Fuer Gassysteme Durch Katalyse und Elektrochemie mbH · DE

Inventors

• Roland Beckmann · Wien, AT
• Karl-Heinz Dulle · Olfen, DE
• Peter Woltering · Neuenkirchen, DE
• Randolf Kiefer · Bochum, DE
• Frank Holthuis · Dortmund, DE
• Frank Funck · Oberhausen, DE
• Wolfram Stolp · Hamm, DE
• Hans-Joachim Kohnke · Kassel, DE
• Joachim Helmke · Vellmar, DE

Key dates

• Filing date: Jul 9, 2005
• Grant date: Nov 15, 2011
• Expiry date: Jul 10, 2028

Classification

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

Abstract

The invention relates to a method for producing electrically conducting nickel oxide surfaces made of nickel-containing material. According to the method, the nickel surface is first degreased and is then roughened for approximately ten minutes in a solution containing about one percent of hydrochloric acid, the process being accelerated by adding hydrogen peroxide solution, resulting in the electrolyte turning green. The nickel surface is briefly wetted, the nickel material is introduced into a solution of 3.5 molar lye to which about ten percent of hydrogen peroxide is added and is kept therein for ten minutes, and the resulting nickel hydroxide surface is dehydrated in a subsequent thermal process and is then further oxidized to obtain nickel oxide. The invention further relates to a conductive boundary layer that is produced according to the method, the electrodes therefrom, and the use thereof in chlorine-alkali electrolysis processes, in fuel cells and storage batteries.