Preparation of cathode active material by hydrothermal reaction
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United States of America Patent
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Issued Date -
Jun 12, 2008
app pub date -
Jul 19, 2004
filing date -
Jul 18, 2003
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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 comprised .epsilon.-phase silver vanadium oxide prepared by using silver- and vanadium-containing starting materials in a stoichiometric molar proportion to give a Ag:V ratio of about 1:2. The reactants are homogenized and then added to an aqueous solution followed by heating in a pressurized vessel. The resulting .epsilon.-phase SVO possesses a higher surface area than .epsilon.-phase SVO produced by other prior art techniques. Consequently, the .epsilon.-phase SVO material provides an advantage in greater discharge capacity in pulse dischargeable cells.
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