Battery element containing efficiency improving additives
AssigneeEnsci, Inc.
InventorsThomas J. Clough, Frank X. McGarvey
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Abstract
A battery element of a lead acid battery including a negative plate, a positive plate and a separator having a metal inhibiting additive that reduces the detrimental effects of at least one impurity on the negative plate.
Claims25
A battery element useful as at least a portion of a plate in a lead acid battery comprising active material, sulfuric acid electrolyte and an acid resistant metal impurity inhibiting amount of macro porous organic polymer particles having phosphonic functional groups which 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 organic polymer is 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 and an acid resistant metal impurity inhibiting amount of macro porous organic polymer particles having phosphonic functional groups which 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 organic polymer is 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 and an acid resistant antimony inhibiting amount of macro porous organic polymer particles having phosphonic functional groups which have a preferential affinity over lead ion for antimony soluble metal impurity ion at the discharge charge electrochemical conditions of the positive and negative plates, provided that at least a portion of said organic polymer is 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.