Electrode binder slurry composition for lithium ion electrical storage devices
AssigneePPG Industries Ohio, Inc.
InventorsStuart D. Hellring, Michael R. Bezak, Randy E. Daughenbaugh, Scott W. Sisco, Jacob W. Mohin, Calum H. Munro, Matthew Stewart
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Abstract
The present invention provides a slurry composition comprising an electrochemically active material and/or an electrically conductive agent, and a binder comprising a polymer comprising a fluoropolymer dispersed in an organic medium; wherein the organic medium has an evaporation rate less than 10 g/min m2, at the dissolution temperature of the fluoropolymer dispersed in the organic medium. The present invention also provides electrodes and electrical storage devices.
Claims23
A slurry composition comprising:
- (a) an electrochemically active material;
- (b) a binder comprising a polymer comprising a fluoropolymer dispersed in an organic medium;
- and
- (c) a dispersant comprising an addition polymer comprising a (meth)acrylic polymer comprising constitutional units comprising a residue of methyl methacrylate;
- wherein the organic medium has an evaporation rate less than 10 grams per square meter per minute, at a dissolution temperature of the fluoropolymer dispersed in the organic medium.
A slurry composition comprising:
- (a) a binder comprising a polymer comprising a fluoropolymer dispersed in an organic medium;
- (b) an electrically conductive agent;
- and
- (c) a dispersant comprising an addition polymer comprising a (meth)acrylic polymer comprising constitutional units comprising a residue of methyl methacrylate;
- wherein the organic medium has an evaporation rate less than 10 grams per square meter per minute, at a dissolution temperature of the fluoropolymer dispersed in the organic medium.
A slurry composition comprising:
- (a) an electrochemically active material and/or an electrically conductive material;
- and
- (b) a binder comprising a polymer comprising a fluoropolymer dispersed in an organic medium;
- and
- wherein the organic medium has an evaporation rate less than 10 grams per square meter per minute, at a dissolution temperature of the fluoropolymer dispersed in the organic medium,
- wherein the organic medium comprises a primary solvent and a co-solvent, and
- wherein the primary solvent comprises butyl pyrrolidone, a trialkylphosphate, 3-methoxy-N,N-dimethylpropanamide, 1,2,3-triacetoxypropane, or combinations thereof, and the co-solvent comprises ethyl acetoacetate, gamma-butyrolactone, propylene glycol methyl ether, dipropylene glycol methyl ether, propylene glycol monopropyl ether, diethylene glycol monobutyl ether, ethylene glycol monohexyl ether, or combinations thereof.
A slurry composition comprising:
- (a) an electrochemically active material and/or an electrically conductive material;
- and
- (b) a binder comprising a polymer comprising a fluoropolymer dispersed in an organic medium;
- and
- wherein the organic medium has an evaporation rate less than 10 grams per square meter per minute, at a dissolution temperature of the fluoropolymer dispersed in the organic medium, and wherein the organic medium comprises a primary solvent comprising a trialkylphosphate and a co-solvent comprising ethyl acetoacetate.
Dependencies are inferred from the claim text.