Silver vanadium oxide having a fine particle size for improved cell performance
OwnerWilliam Paulot, Dominick Frustaci +1inventors
InventorsWilliam Paulot, Dominick Frustaci, Gary Freitag
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Abstract
The present invention relates to the use of SVO classified to a particle size of about 25μ to about 75μ as a cathode active material in a lithium electrochemical cell. The cathode electrode is fabricated into an electrode assembly by overlaying it with an anode electrode and an intermediate separator. The reduced particle size of the SVO material means that a separator of reduced thickness is used, which provides space for more active materials in a casing of a given volume. The electrode assembly is then hermetically sealed in a casing and used as the power source for such devices as implantable medical devices.
Claims33
An electrochemical cell, which comprises:
- a) an anode;
- b) a cathode comprising a cathode active material of a particle size of about 75μ or less;
- c) a separator disposed intermediate the anode and the cathode to prevent direct physical contact between them;
- and
- d) an electrolyte activating the anode and the cathode.
An electrochemical cell having a lithium anode, a cathode comprising silver vanadium oxide, a nonaqueous electrolyte and a separator disposed between the anode and the cathode, the improvement comprising the silver vanadium oxide having a particle size of about 75μ or less.
A method for providing an electrochemical cell, comprising the steps of:
- a) providing an anode;
- b) providing a cathode of a cathode active material having a particle size of about 75μ or less;
- c) positioning a separator between the anode and the cathode;
- and
- d) activating the anode and the cathode with an electrolyte.
Dependencies are inferred from the claim text.