Method For Coating Noble Metals On Titanium Current Collectors For Use In Nonaqueous Li/CFx Cells
AssigneeWilson Greatbatch Technologies, Inc.
InventorsEsther Takeuchi, Bruce Platt, Sally Smesko, Eric Ziarniak, Mark Roy
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Abstract
A lithium/fluorinated carbon electrochemical cell having the CFx material supported on a titanium current collector screen sputter coated with a noble metal is described. The gold, iridium, palladium, platinum, rhodium and ruthenium-coated titanium current collector provides the cell with higher rate capability, even after exposure to high temperatures, in comparison to cells of a similar chemistry having the CFx contacted to a titanium current collector painted with a carbon coating.
Claims20
A method for providing an electrochemical cell, comprising the steps of:
- a) providing an anode comprising lithium;
- b) providing a cathode comprising a solid cathode active material contacted to a conductive current collector comprising titanium provided with a coating selected from the group consisting of gold, iridium, palladium, platinum, rhodium, ruthenium, and mixtures thereof;
- and
- c) activating the anode and the cathode with an electrolyte.
A method for providing an electrochemical cell, comprising the steps of:
- a) providing a casing;
- b) providing an anode comprising lithium;
- c) providing a cathode active material selected from the group consisting of fluorinated carbon, silver vanadium oxide, copper silver vanadium oxide, manganese dioxide, lithium cobalt oxide, lithium nickel oxide, copper oxide, titanium disulfide, copper sulfide, iron sulfide, iron disulfide, copper vanadium oxide, and mixtures thereof;
- d) coating a titanium current collector with one of gold, iridium, palladium, platinum, rhodium and ruthenium, and mixtures thereof;
- e) contacting the cathode active material to the coated titanium current collector to provide a cathode;
- f) operatively associating the anode with the cathode housed inside the casing;
- and
- g) activating the anode and the cathode with an electrolyte filled into the casing.
A method for providing an electrochemical cell, comprising the steps of:
- a) providing an anode comprising lithium contacted to a nickel current collector;
- b) providing a cathode comprising fluorinated carbon contacted to a titanium current collector provided with a coating selected from the group consisting of gold, iridium, palladium, platinum, rhodium, ruthenium, and mixtures thereof, wherein the coating has a thickness of about 20 μinches to about 100 μinches;
- and
- c) activating the anode and the cathode with an electrolyte comprising LiBF4 in γ-butyrolactone.
Dependencies are inferred from the claim text.