Lithium-iodine electrochemical cells with improved end of life characteristics
AssigneeMedtronic, Inc.
InventorsDavid L. Blattenberger, William D. Helgeson, John C. Strohkirch, Bernard Heller
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Abstract
In lithium iodine electrochemical cells, control of polyvinylpyridine film thickness and/or polyvinylpyridine film surface area coverage and/or control of the quantity thereof on or with respect to the lithium anode operative surface directly affects cell voltage characteristics during discharge, allowing the tailoring of the voltage characteristics near cell end-of-life (EOL) in a useful way.
Claims16
An electrochemical cell comprising a lithium anode and an iodine-containing cathode, the lithium anode having a first operative portion and a second operative portion, said first operative portion having a weight of polymeric organic donor material thereon and said second operative portion having a lesser weight of polymeric organic donor material thereon, whereby desirable end-of-life characteristics are provided.
A method for modifying the end-of-life characteristics of an electrochemical cell having a lithium anode and a iodine-containing cathode by the steps comprising:
- applying to a first operative portion of the anode a weight of polymeric organic donor material;
- applying to a second operative portion of the anode a second, lesser weight of polymeric organic donor material.
Dependencies are inferred from the claim text.