Battery element containing metal inhibiting additives
AssigneeEnsci, Inc.
InventorThomas J. Clough
Life of this patent
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Abstract
A battery element of a lead acid battery including a negative plate, a positive and a separator having a metal inhibiting additive that reduces the detrimental effects of at least one impurity on the negative plate.
Claims28
A battery element useful as at least a portion of a plate in a lead acid battery comprising active material, sulfuric acid electrolyte including metal impurity ion and an acid resistant metal impurity inhibiting amount of one or more porous organic polymers having a plurality of chemically different functional groups which one or more polymers have a preferential affinity over lead ion for at least one electrolyte soluble metal impurity ion more nobler than lead at the discharge/charge electrochemical conditions of the positive and negative plates provided that at least a portion of said one or more organic polymers are incorporated into said active material and in contact with the metal impurity ion containing electrolyte to allow said ion to permeate the porous polymer.
A battery element useful as at least a portion of the negative plate in a lead acid battery comprising negative active material, sulfuric acid electrolyte including metal impurity ion and an acid resistant metal impurity inhibiting amount of one or more porous organic polymers having a plurality of chemically different functional groups which one or more polymers have a preferential affinity over lead ion for at least one electrolyte soluble metal impurity ion more nobler than lead at the discharge/charge electrochemical conditions of the positive and negative plates provided that at least a portion of said one or more organic polymers are incorporated into said active material and in contact with the metal impurity ion containing electrolyte to allow said ion to permeate the porous polymer.
A battery element useful as at least a portion of the negative plate in a lead acid battery comprising negative active material, sulfuric acid electrolyte including antimony ion and an acid resistant antimony inhibiting amount of one or more porous organic polymers having a plurality of chemically different functional groups which one or more polymers have a preferential affinity over lead ion for antimony ion the discharge/charge electrochemical conditions of the positive and negative plates provided that at least a portion of said one or more organic polymers are incorporated into said active material and in contact with the antimony ion containing electrolyte to allow said ion to permeate the porous polymer.
Dependencies are inferred from the claim text.