Porous composite product in particular with a high specific surface preparation process and electrode formed of a porous composite film for an electro-chemical assembly
AssigneeBollore
InventorsJean-François Penneau, François Capitaine, Philippe Le Goff
Life of this patent
Estimating the term…
Abstract
A porous composite product in the form of a film with a high specific surface. Used in a wide range of electrochemical products especially in the field of selective membranes, packaging or catalysis. The porous composite product has a high homogeneity in the distribution of the filler and a continuous structure. The product is capable of being obtained by extrusion.
Claims20
An electrode for an electrochemical assembly, the electrode comprising a film of porous composite product consisting of:
- 10 to 40% by weight of thermoplastic elastomers or polymers which are insoluble in aqueous or organic solvents,
- 5 to 40% by weight of polymers which are soluble in aqueous or organic solvents, the soluble polymers being selected from the group consisting of polyethers and polyalcohols, and
- between 30% and 90% by weight of carbonaceous inorganic fillers having a specific surface greater than 1000 m2/g,
- wherein the insoluble thermoplastic elastomers or polymers and the soluble polymers form a non-fibrillated polymeric material,
- the said film being obtained by extrusion, the porous composite product exhibiting a “BET” specific surface of greater than 10 m2/g and having an electrochemical capacity of greater than 2 F/g.
An electrochemical assembly, comprising two electrodes and a separator impregnated with an electrolyte, each electrode comprising a film of porous composite product consisting of:
- 10 to 40% by weight of thermoplastic elastomers or polymers which are insoluble in aqueous or organic solvents,
- 5 to 40% by weight of polymers which are soluble in aqueous or organic solvents, the soluble polymers being selected from the group consisting of polyethers and polyalcohols, and
- between 30% and 90% by weight of inorganic fillers,
- wherein the insoluble thermoplastic elastomers or polymers and the soluble polymers form a non-fibrillated polymeric material,
- the said film being obtained by extrusion, the porous composite product exhibiting a “BET” specific surface of greater than 10 m2/g having an electrochemical capacity of greater than 2 F/g.
An application of a film of porous composite product consisting of:
- 10 to 40% by weight of thermoplastic elastomers or polymers which are insoluble in aqueous or organic solvents,
- 5 to 40% by weight of polymers which are soluble in aqueous or organic solvents, the soluble polymers being selected from the group consisting of polyethers and polyalcohols, and
- between 30% and 90% by weight of carbonaceous inorganic fillers having a specific surface greater than 1000 m2/g,
- wherein the insoluble thermoplastic elastomers or polymers and the soluble polymers form a non-fibrillated polymeric material,the said film being obtained by extrusion, the porous composite product exhibiting a “BET” specific surface of greater than 10 m2/g and having an electrochemical capacity of greater than 2 F/g, for the electromechanical storage of energy.
A supercapacitor or capacitor comprising an electrode comprising a film of porous composite product consisting of:
- 10 to 40% by weight of thermoplastic elastomers or polymers which are insoluble in aqueous or organic solvents,
- 5 to 40% by weight of polymers which are soluble in aqueous or organic solvents, the soluble polymers being selected from the group consisting of polyethers and polyalcohols, and
- between 30% and 90% by weight of carbonaceous inorganic fillers having a specific surface greater than 1000 m2/g,
- wherein the insoluble thermoplastic elastomers or polymers and the soluble polymers form a non-fibrillated polymeric material,
- the said film being obtained by extrusion, the porous composite product exhibiting a “BET” specific surface of greater than 10 m2/g and having an electrochemical capacity of greater than 2 F/g.
Dependencies are inferred from the claim text.