Patent · US Expired

Process for the production of a positive electrode in ribbon form for primary and secondary cells

US5158722A · kind A · utility

26Cited by

5References

12Claims

0Family size

Assignee

Varta Batterie Aktiengesellschaft · DE

Inventors

Dejan Ilic · Ellwangen (Jagst), DE
Hans Sauer · Bamberg, DE
Dirk Neumann · Essen, DE

Key dates

Filing date	May 6, 1991
Grant date	Oct 27, 1992
Priority date	—
Expiry date	May 6, 2011

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P70/50
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Positive ribbon electrodes for primary and secondary cells are produced in a dry process wherein two strips of active material in powder form, preferably comprised of MnO.sub.2, FeS.sub.2, CuO, .alpha.-Cu.sub.2 V.sub.2 O.sub.7, and Li.sub.x MnO.sub.y, are simultaneously rolled and then fed into the gap of a roller mechanism, on opposite sides of an interposed metal net or mesh, to roll coat both sides of the lattice-like carrier strip. After excess mass is stripped off, the finished electrode ribbon has a thickness of less than 0.45 mm and a porosity of more than 24% which, because of its large active surface, is advantageously used in wound batteries incorporating Li or H.sub.2 electrodes.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.