Silver vanadium oxide having low internal resistance and method of manufacture
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United States of America Patent
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Oct 12, 2004
Grant Date -
Jul 4, 2002
app pub date -
Dec 27, 2001
filing date -
Dec 28, 2000
priority date (Note) -
Expired
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Abstract
The current invention relates to the preparation of an improved cathode active material for non-aqueous lithium electrochemical cell. In particular, the cathode active material comprises .epsilon.-phase silver vanadium oxide prepared by using a .gamma.-phase silver vanadium oxide starting material. The reaction of .gamma.-phase SVO with a silver salt produces the novel .epsilon.-phase SVO possessing a lower surface area than .epsilon.-phase SVO produced from vanadium oxide (V.sub.2 O.sub.5) and a similar silver salt as starting materials. Consequently, the low surface area .epsilon.-phase SVO material provides an advantage in greater long term stability in pulse dischargeable cells.
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