Title:
BATTERY CATHODE AND METHOD OF MANUFACTURE THEREFOR
Document Type and Number:
WIPO Patent Application WO2002059991
Kind Code:
A3
Abstract:
The invention provides an improved method for preparing homogeneous intermixtures of particulate manganese dioxide and conductive carbon for use in cathodes for electrocheminal cells, in particular alkaline primary cells. Homogeneous intermixtures can be prepared by mechanically activating an essentially dry admixture of particulate electrolytic manganese dioxide and a natural graphite, an expanded graphite or combinations thereof with inert, rigid milling media by the agitation process of the invention. Improved cell discharge performance at both low and high rates of discharge can be achieved for extremely low levels of highly expanded graphite, typically between about 1 and 5 wt %.
Inventors:
CHRISTIAN PAUL A (US)
MAO OU (US)
ZENG SHUMING (US)
MAO OU (US)
ZENG SHUMING (US)
Application Number:
PCT/US2002/001623
Publication Date:
August 19, 2004
Filing Date:
January 18, 2002
Export Citation:
Assignee:
GILLETTE CO (US)
CHRISTIAN PAUL A (US)
MAO OU (US)
ZENG SHUMING (US)
CHRISTIAN PAUL A (US)
MAO OU (US)
ZENG SHUMING (US)
International Classes:
C01G45/02; H01M4/06; H01M4/08; H01M4/50; H01M4/62; H01M6/06; (IPC1-7): H01M4/50; H01M4/08; H01M4/50; H01M4/62
Domestic Patent References:
| WO2002071508A2 | 2002-09-12 |
Foreign References:
| US5419986A | 1995-05-30 | |||
| US4894296A | 1990-01-16 | |||
| EP0962997A1 | 1999-12-08 | |||
| EP0777285A1 | 1997-06-04 | |||
| US6162561A | 2000-12-19 |
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