Process for producing manganese dioxide
US5391365A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1993 |
| Grant date | Feb 21, 1995 |
| Priority date | — |
| Expiry date | Nov 16, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to the manufacture of manganese dioxide by a chemical process. The resulting manganese dioxide product takes the form of particles characterized by filament-like protrusions jutting out from its surface. The manganese dioxide particles having such surface features can be manufactured by reacting manganese sulfate with sodium peroxodisulfate in an aqueous solution. The process can be controlled to yield manganese dioxide of varying density and surface area. The manganese dioxide formed in the process can be deposited directly onto the surface of electrolytic manganese dioxide (EMD) or onto the surface of other particles. The manganese dioxide product is particularly suitable for use as a cathode active material in electrochemical cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.