CROSS-LINKED BINDER COMPOSITION FOR LITHIUM ION BATTERIES AND METHODS FOR PRODUCING THE SAME
The presently disclosed and/or claimed inventive concept(s) relates to a binder composition comprising a cross-linked polymer system. The cross-linked polymer system comprises an ionizable water soluble polymer cross-linked with a component using an esterification catalyst and/or an epoxy resin with two or more epoxide groups. The presently disclosed and/or claimed inventive concept(s) also relates generally to the compositions and methods of making electrodes, in particular but without limitation, anodes, with a binder composition comprising an ionizable water soluble polymer cross-linked with a component.
1 - 65 . (canceled)
66 . A binder composition for a lithium ion battery electrode comprising a cross-linked polymer system, wherein the cross-linked polymer system comprises (i) an ionizable water soluble polymer at least partially cross-linked with a component, and (ii) at least one of (a) an esterification catalyst and (b) an epoxy resin comprising at least two epoxide groups, and wherein the cross-linked polymer system is insoluble in water.
67 . The binder composition of claim 66 , wherein the ionizable water soluble polymer comprises at least one of xanthan gum, alginate, and an anionically modified polysaccharide selected from the group consisting of carboxyalkyl cellulose, carboxyalkyl hydroxyalkyl cellulose, and combinations thereof, and wherein the ionizable water soluble polymer comprises at least one hydroxyl group.
68 . The binder composition of claim 67 , wherein the ionizable water soluble polymer comprises at least one of lithiated xanthan gum, lithiated alginate, and a lithiated anionically modified polysaccharide selected from the group consisting of lithiated carboxyalkyl cellulose, lithiated carboxyalkyl hydroxyalkyl cellulose, and combinations thereof.
69 . The binder composition of claim 66 , wherein the component is a synthetic polymer comprising at least one carboxyl group and is selected from the group consisting of polyacrylic acid, polyacrylic acid copolymers, methyl vinyl ether and maleic anhydride copolymers, modified methyl vinyl ether and maleic anhydride copolymers, styrene maleic anhydride copolymers, and combinations thereof.
70 . The binder composition of claim 66 , wherein the component is a polycarboxylic acid selected from the group consisting of formic acid, acetic acid chloroacetic acid, dichloroacetic acid, trichloroacetic acid, trifluoroacetic acid, oxalic acid, benzoic acid, and combinations thereof.
71 . The binder composition of claim 66 , wherein the component is lithiated.
72 . The binder composition of claim 66 , wherein the esterification catalyst is selected from the group consisting of sodium hypophosphite, sulphonic acid, methane sulphonic acid, trifluoromethane sulphonic acid, titanate esters, dialkyl tin, and combinations thereof.
73 . The binder composition of claim 66 , wherein the epoxy resin comprising at least two epoxide groups is at least one of a di-epoxy, tri-epoxy, tetra-epoxy, and combinations thereof.
74 . The binder composition of claim 73 , further comprising an epoxy cross-linking catalyst selected from the group consisting of tertiary amines, quaternary amines, imidazoles, phosphonium compounds, chelates, and combinations thereof.
75 . A slurry for use in preparation of a lithium ion battery, comprising:
an electrode active material;
an ionizable water soluble polymer;
a component;
at least one of an esterification catalyst and an epoxy resin; and
water.
76 . The slurry of claim 75 , wherein the electrode active material is at least one of (i) an anode active material and (ii) a cathode active material.
77 . The slurry of claim 76 , wherein the anode active material is selected from the group consisting of artificial graphite, natural graphite, surface modified graphite, coke, hard carbon, soft carbon, carbon fiber, conductive carbon, and combinations thereof.
78 . The slurry of claim 77 , wherein the anode active material further comprises at least one of silicon and silicon oxide, wherein the silicon-containing anode active material comprises at least one hydroxyl group on the surface.
79 . The slurry of claim 75 , wherein the ionizable water soluble polymer comprises at least one of xanthan gum, alginate, and an anionically modified polysaccharide selected from the group consisting of carboxyalkyl cellulose, carboxyalkyl hydroxyalkyl cellulose, and combinations thereof, and wherein the ionizable water soluble polymer comprises at least one hydroxyl group.
80 . The slurry of claim 79 , wherein the ionizable water soluble polymer comprises at least one of lithiated xanthan gum, lithiated alginate, and a lithiated anionically modified polysaccharide selected from the group consisting of lithiated carboxyalkyl cellulose, lithiated carboxyalkyl hydroxyalkyl cellulose, and combinations thereof.
81 . The slurry of claim 75 , wherein the component is a synthetic polymer comprising at least one carboxyl group and is selected from the group consisting of polyacrylic acid, polyacrylic acid copolymers, methyl vinyl ether and maleic anhydride copolymers, modified methyl vinyl ether and maleic anhydride copolymers, styrene maleic anhydride copolymers, and combinations thereof.
82 . The slurry of claim 75 , wherein the component is a polycarboxylic acid selected from the group consisting of formic acid, acetic acid chloroacetic acid, dichloroacetic acid, trichloroacetic acid, trifluoroacetic acid, oxalic acid, benzoic acid, and combinations thereof.
83 . The slurry of claim 75 , wherein the component is lithiated.
84 . The slurry of claim 75 , wherein the esterification catalyst is selected from the group consisting of sodium hypophosphite, sulphonic acid, methane sulphonic acid, trifluoromethane sulphonic acid, titanate esters, dialkyl tin, and combinations thereof.
85 . The slurry of claim 75 , wherein the epoxy resin comprises at least two epoxide groups.
86 . The slurry of claim 85 , wherein the epoxy resin is in an aqueous dispersion comprising at least one surfactant selected from the group consisting of phosphate esters, imidazolines, amides, and combinations thereof.
87 . The slurry of claim 85 , further comprising an epoxy cross-linking catalyst selected from the group consisting of tertiary amines, quaternary amines, imidazoles, phosphonium compounds, chelates, and combinations thereof.
88 . A film for use in preparation of a lithium ion battery, comprising:
an electrode active material; and
the binder composition of claim 66 .
89 . An electrode for a lithium ion battery, comprising:
the film of claim 88 ; and
a current collector.
90 . The electrode of claim 89 , wherein the current collector is made of a material selected from the group consisting of aluminum, carbon, copper, stainless steel, nickel, zinc, silver, and combinations thereof.