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US 12,489,106 B2Granted
Method for the manufacture of electrodes
AssigneesSyensqo SA, Politecnico Di Torino
InventorsJulio A. Abusleme, Maurizio Biso, Alberto Frache, Daniele Battegazzore, Francesco Liberale
Life of this patent
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Abstract
The present invention pertains to an electrode-forming composition, to use of said electrode-forming composition in a process for the manufacture of an electrode, to said electrode and to an electrochemical device comprising said electrode.
Claims15
A composition [composition (C)] comprising:
- from 0.5 wt. % to less than 20 wt. % of at least one semi-crystalline partially fluorinated polymer [polymer (F)] comprising recurring units derived from 1,1-difluoroethylene (VDF) and recurring units derived from at least one hydrogenated monomer comprising at least one carboxylic acid end group [monomer (MA)];
- from 10 wt. % to less than 60 wt. % of at least one liquid medium [medium (L)] characterized by a boiling point equal to or higher than 150°° C., wherein said medium (L) is selected from the group consisting of organic carbonates, ionic liquids (IL), or combinations thereof;
- and
- at least 50 wt. % of at least one electro-active compound [compound (EA)];
- wherein the above amounts are based on the total weight of said composition (C), and wherein said polymer (F) is characterized by an intrinsic viscosity higher than 0.05 L/g, the intrinsic viscosity being measured from the dropping time of a solution of said polymer (F) at 25° C. at a concentration of 0.2 g/dl in N.N-dimethylformamide using a Ubbelhode viscosimeter, and
- wherein the composition (C) is free from any polar solvent [solvent(S)].
3 more elements
A process for the manufacture of an assembly, said process comprising:
- (i) providing a substrate;
- (ii) providing composition (C) comprising:
- from 0.5 wt. % to less than 20 wt. % of at least one semi-crystalline partially fluorinated polymer [polymer (F)] comprising recurring units derived from 1,1-difluoroethylene (VDF);
- from 10 wt. % to less than 60 wt. % of at least one liquid medium [medium (L)] characterized by a boiling point equal to or higher than 150° C., wherein said medium (L) is selected from the group consisting of organic carbonates, ionic liquids (IL), or combinations;
- at least 50 wt. % of at least one electro-active compound [compound (EA)];
- wherein the above amounts are based on the total weight of said composition (C), and
- wherein said polymer (F) is characterized by an intrinsic viscosity higher than 0.05 L/g, the intrinsic viscosity being measured from the dropping time of a solution of said polymer (F) at 25° C. at a concentration of 0.2 g/dL in N.N-dimethylformamide using a Ubbelhode viscosimeter;
- and
- wherein the composition (C) is free from any polar solvent [solvent(S)];
- (iii) heating said composition (C) at a temperature higher than 100° C.;
- (iv) extruding the composition (C) provided in step (ii) onto the substrate provided in step (i), thereby providing an assembly comprising a substrate coated with at least one layer consisting of said composition (C).
8 more elements
Dependencies are inferred from the claim text.