Cathode materials
First Claim
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1. In the method of preparing cathode material comprising the steps of mixing polymeric material selected from the group consisting of P2VP, P4VP, and mixtures thereof with a quantity of iodine and heating the mixture, the improvement comprising placing the mixture in a sealed container in the presence of a protective atmosphere prior to heating and heating to a temperature of at least about 150°
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Abstract
Methods for the preparation of polyvinylpyridine and iodine (PVP.nI2) as cathode materials for electrochemical cells.
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21 Claims
- 1. In the method of preparing cathode material comprising the steps of mixing polymeric material selected from the group consisting of P2VP, P4VP, and mixtures thereof with a quantity of iodine and heating the mixture, the improvement comprising placing the mixture in a sealed container in the presence of a protective atmosphere prior to heating and heating to a temperature of at least about 150°
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9. In the method of preparing cathode material comprising the steps of mixing polymeric material selected from the group consisting of P2VP, P4VP, and mixtures thereof with a quantity of iodine and heating the mixture, the improvement comprising placing the mixture in a container and subjecting it to a treatment sequence selected from the group consisting of:
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A. sealing the mixture in the container under vacuum and heating the mixture for a time to a temperature of at least about 150°
C.B. sealing the mixture in the container with an inert atmosphere and heating the mixture for a time to a temperature of at least about 150°
C., andC. sealing the mixture in the container with an atmosphere selected from the group consisting of ambient, inert, and vacuum, heating the mixture for a time to a temperature of at least about 150°
C., and subjecting the mixture to a vacuum for a time following the heating step to remove volatiles. - View Dependent Claims (12, 13, 17, 18, 19, 20, 21)
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Specification