Title:
MANGANESE OXIDE BASED CATALYST AND ELECTRODE FOR ALKALINE ELECTROCHEMICAL SYSTEM AND METHOD OF ITS PRODUCTION
Document Type and Number:
WIPO Patent Application WO2003067685
Kind Code:
A3
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.
Inventors:
NDZEBET ERNEST
RAMASWAMI KARTHIK
MORTENSEN ERIK
RAMASWAMI KARTHIK
MORTENSEN ERIK
Application Number:
PCT/US2003/003270
Publication Date:
December 29, 2004
Filing Date:
February 04, 2003
Export Citation:
Assignee:
RAY O VAC CORP (US)
International Classes:
C01B35/08; C01G45/02; H01B1/00; H01B1/04; H01C1/00; H01M4/00; H01M4/88; H01M4/90; H01M4/96; H01M12/06; H01M4/86; (IPC1-7): H01M4/90; C01G45/02; H01M4/96; H01M12/06
Domestic Patent References:
| WO1991020102A1 | 1991-12-26 |
Foreign References:
| US6465129B1 | 2002-10-15 | |||
| US6428931B1 | 2002-08-06 | |||
| US6444609B1 | 2002-09-03 | |||
| US4894296A | 1990-01-16 | |||
| GB2059141A | 1981-04-15 | |||
| GB2147285A | 1985-05-09 |
Other References:
LEROUX F ET AL: "3-volt manganese dioxide: the amorphous alternative", SOLID STATE IONICS, NORTH HOLLAND PUB. COMPANY. AMSTERDAM, NL, vol. 100, no. 1-2, 1 September 1997 (1997-09-01), pages 103 - 113, XP004097866, ISSN: 0167-2738
PATENT ABSTRACTS OF JAPAN vol. 0071, no. 11 (E - 175) 14 May 1983 (1983-05-14)
PATENT ABSTRACTS OF JAPAN vol. 0071, no. 11 (E - 175) 14 May 1983 (1983-05-14)
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