Compositions of polyvinylpyridine and iodine
AssigneeMedtronic, Inc.
InventorGary M. Phillips
Life of this patent
Estimating the term…
Abstract
Compositions of and methods for the preparation of polyvinylpyridine and iodine (PVP.nI.sub.2) as cathode materials for electrochemical cells.
Claims3
A composition comprising an initial polyvinylpyridine polymer component, selected from the group consisting of P2VP, P4VP and mixtures thereof, and iodine in a predetermined mole ratio of from about 20:1 to about 40:1, the composition having a conductivity measured at 37.degree. C. of at least about 1.5.times.10.sup.-3 reciprocal ohm-cm and being formed in a sealed container by mixing the polymer component and at least a portion of the iodine together and by heating the polymer component before or during mixing, or by heating the resultant mixture, to a temperature in excess of about 225.degree. C., and thereafter adding the remaining balance, if any, of the iodine to make-up the predetermined mole ratio.
A composition comprising an initial polyvinylpyridine polymer component, selected from the group consisting of P2VP, P4VP and mixtures thereof, and iodine in a predetermined mole ratio of at least about 20:1, the composition having a conductivity measured at 37.degree. C. of at least about 1.5.times.10.sup.-3 reciprocal ohm-cm and being formed in a sealed container by mixing the polymer component and at least a portion of the iodine together and by heating the polymer component before or during mixing, or by heating the resultant mixture, to a temperature in excess of about 225.degree. C. and thereafter adding the remaining balance, if any, of the iodine to make-up the predetermined mole ratio.
Dependencies are inferred from the claim text.