Rechargeable accumulator having a manganese dioxide electrode and an acid electrolyte

US4096318A · kind A · utility

Assignee

• BASF SE

Inventors

• Rolf Wurmb
• Fritz Beck · Duisburg, DE
• Gerd Wunsch · Speyer, DE
• Klaus Boehlke
• Wolfram Treptow

Key dates

• Filing date: Apr 14, 1977
• Grant date: Jun 20, 1978
• Expiry date: Apr 14, 1997

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/10
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

An accumulator having an acid electrolyte and possessing two electrodes of the first kind mounted on base electrodes. The active material on the positive side contains manganese dioxide. The base electrode on the negative side consists of powdered graphite embedded in a binder which is resistant to the electrolyte. The base electrode on the positive side has a coarse porous structure and consists of graphite or titanium coated with titanium nitride or titanium carbide. The average pore diameters are from 0.1 to 2 mm and the pore volume is from 20 to 70%.