Manganese oxide based electrode for alkaline electrochemical system and method of its production
AssigneeRayovac Corporation
InventorErnest Ndzebet
Life of this patent
Estimating the term…
Abstract
A method is disclosed for preparing cathodes loaded with manganese oxide that are suitable for use in metal-air cells. The manganese oxide is prepared from the reduction of potassium permanganate by sodium formate at a substantially neutral pH level to produce manganese oxide sols. The sols are then mixed with a carbon slurry to produce a colloidal suspension. The suspension is subsequently waterproofed before being filtered, washed, dried, and rolled to produce the active catalyst layer for the cathode during discharge of the cell. The catalyst layer is then laminated with a current collector and air diffusion layer. A separator is then added to provide a carbon-based air cathode loaded with manganese oxide.
Claims18
A method for producing a cathode mixture having manganese oxide particles, comprising:
- providing a first chemical compound having manganese;
- providing an organic reducing agent having a single carbon atom;
- mixing the first chemical compound with the reducing agent to yield a sol of manganese oxide particles;
- and
- adding the sol to a carbon slurry to produce a carbon slurry with suspended manganese oxide particles.
A method for producing a cathode having manganese oxide particles, comprising:
- providing a first chemical compound having manganese;
- providing an organic reducing agent having a single carbon atom;
- mixing the first chemical compound with the reducing agent to yield a sol of manganese oxide particles;
- adding the sol to a carbon slurry to produce a suspension of carbon slurry containing manganese oxide particles;
- mixing a waterproofing agent to the suspension to produce a cathode compound;
- and
- drying and rolling the cathode compound.
A method for producing a cathode mixture having manganese oxide particles, comprising:
- providing a first chemical compound having manganese;
- providing an organic reducing agent;
- mixing the first chemical compound with the reducing agent to yield a sol of manganese oxide particles;
- and
- adding the manganese oxide compound to a carbon slurry to produce a suspension of carbon slurry with suspended manganese oxide particles.
Dependencies are inferred from the claim text.