Back to results
US 10,947,378 B2Granted
Fluoropolymer compositions with high content of inorganic material
Assignee3M Innovative Properties Company
InventorsKlaus Hintzer, Michael C. Dadalas
Life of this patent
Estimating the term…
Abstract
A fluoropolymer composition particles comprising electro-active material, wherein the electro-active material comprises graphite and metal compounds and combinations thereof. The compositions also comprise water and an organic liquid having a boiling point between 70 C and 200 C. Also provided are methods of making a paste and methods of making electrodes and electrodes made with the paste.
Claims14
A fluoropolymer composition comprising
- (i) fluoropolymer particles comprising (a) repeating units derived from at least one perfluorinated comonomer selected from tetrafluoroethylene, hexafluoropropylene and a combination thereof;
- and (b) one or more non-perfluorinated comonomers selected from vinylidenefluoride, ethylene, propylene and a combination thereof;
- wherein the total amount of the perfluorinated comonomers is at least 40% by mole based on the total amount in moles of comonomers and wherein the fluoropolymer is melt processable;
- (ii) from about 30% to about 70% by weight, based on the total weight of the composition, of particles comprising electro-active material, wherein the electro-active material is selected from graphite, a metal compound, and combinations thereof;
- (iii) water;
- (iv) an organic liquid having a boiling point between 70° C. and 200° C. selected from non-functional hydrocarbons and functional hydrocarbons, which functional hydrocarbons contain one or more functionality selected from nitriles, chlorines, and oxygen-containing functionalities selected from ethers, alcohols, carboxylates, carboxylate esters and combinations thereof,
- wherein the amount by weight of the particles comprising electroactive materials (ii) is greater than the amount of fluoropolymer particles (i) and wherein the amount by weight of water is greater than the amount of organic liquid.
4 more elements
Dependencies are inferred from the claim text.