Oxidized titanium as a cathodic current collector
OwnerW. Richard Brown, Christine A. Frysz +2inventors
InventorsW. Richard Brown, Christine A. Frysz, Sally Ann Smesko, Esther S. Takeuchi
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Abstract
A titanium substrate having a thickened outer oxidation layer provided thereon by a treatment process performed either in an air atmosphere at elevated temperatures or through electrolytic oxidation (anodization), is described. The thusly conditioned titanium substrate serving as a cathode current collector for an electrode incorporated into an electrochemical cell exhibits improved electrical performance in comparison to the prior art techniques, i.e., electrically conducted carbon coated titanium screen and use of highly corrosion resistant materials, upon subsequent elevated temperature exposure.
Claims39
An electrochemical cell, which comprises:
- a) a casing;
- b) an anode disposed inside the casing;
- c) a cathode in electrical association with the anode inside the casing, wherein the cathode comprises a cathode active material contacted to a titanium current collector provided with thickened titanium oxide on an outer surface thereof and in contact with the cathode active material;
- and
- d) an electrolyte.
An electrode, which comprises:
- a) an electrode active material;
- and
- b) a titanium current collector provided with thickened titanium oxide on an outer surface thereof and in contact with the electrode active material.
A method for constructing an electrochemical cell comprising the steps of:
- a) providing an anode;
- b) providing a cathode active material contacted to a titanium current collector provided with a thickened titanium oxide on an outer surface thereof and in contact with the cathode active material to provide the cathode;
- and
- c) activating the anode and cathode with an electrolyte.
Dependencies are inferred from the claim text.