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1. WO2020109841 - SUPERCONDENSATEUR SOUPLE, BIODÉGRADABLE ET BIOCOMPATIBLE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1. A supercondenser comprising at least two electrodes separated by at least one separator comprising a polyhydroxyalkanoate (PHA) and at least one electrolyte.

2. The supercondenser according to claim 1, wherein said at least two electrodes comprise a conductive material, preferably selected from: gold, silver, aluminium, carbon fibres, activated carbon fibres, activated carbon, carbon gel, mesocarbon, graphene, carbon nanotubes, carbon black, polyaniline (PANI), polypyrrole (PPY) , poly (p-phenylene-vinylylene ) (PPV) , poly ( 3 , 4-ethylenedioxythiophene ) (PEDOT) or other polythiophene derivatives.

3. The supercondenser according to claim 1 or 2, wherein the PHA is a polymer containing repeating units of formula ( I ) :

-O-CHRi- (CH2) n-CO- (I)

where :

Ri is selected from: C1-C12 alkyls, C4-C16 cycloalkyls, C2-C12 alkenyls, optionally substituted with at least a group selected from: halogen (F, Cl, Br) , -CN, -OH, -OOH, -OR, -COOR (R = C1-C4 alkyl, benzyl);

n is zero or an integer from 1 to 6, preferably 1 or 2.

4. The supercondenser according to claim 3, wherein the PHA is a homopolymer, or a copolymer, or a terpolymer, preferably is a homopolymer, more preferably is a polyhydroxybutyrate (PHB) .

5. The supercondenser according to any one of the preceding claims, wherein the separator comprises from 10% to 90% by weight, preferably from 30% to 80% by weight, of PHA, and from 10% to 90% by weight, preferably from 20% to 70% by weight, of electrolyte, the percentages being expressed with respect to the weight of the separator.

6. The supercondenser according to any one of the preceding claims, wherein the at least one electrolyte is an ionic liquid, preferably selected from: derivatives of natural amino acids, natural derivatives of lignin, ionic liquids of synthetic origin .

7. The supercondenser according to claim 6, wherein the at least one electrolyte is selected from: tetrabutylammonium L-proline (TBA L-Pro) , choline bis (trifluoromethylsulfonyl) imide (choline (Tf2N) ) , tetraethylammonium L-proline (TEA L-Pro); phosphoric acid of N-ethyl-N- ( furan-2-yl-methyl ) ethanamine

([FurEt2NH] [H2PO4]), phosphoric acid of N-ethyl-N- ( 4-methoxybenzyl ) ethanamine ( [p-AnisEt2NH] [H2PO4] ) , phosphoric acid of N-4- ( (diethylamino) methyl) -2-methoxyphenol ( [VanEt2NH] [H2PO4] ) ; l-butyl-3-methylimidazolium tetrafluoroborate (BMIM(BF4)), 1-butyl-3-methylimidazolium

bis (trifluoromethylsulfonyl) imide (BMIM ( Tf2N) ) , 1-ethyl-3-methylimidazolium

bis (trifluoromethylsulfonyl) imide (EMIM(Tf2N) ) .

8. A process for the production of a supercondenser according to any one of claims 1 to 7, comprising the steps of:

providing at least two electrodes;

providing at least one separator comprising a polyhydroxyalkanoate (PHA) and an electrolyte;

placing each electrode in contact with a corresponding surface of the separator.

9. The process according to claim 8, wherein the step of providing at least one separator comprises a step wherein the PHA is combined with the electrolyte by means of solvent casting or electrospinning or electrospraying .

10. The process according to claim 9, wherein the step wherein the PHA is combined with the electrolyte is carried out by means of solvent casting and comprises the steps of:

dissolving the PHA in a solvent, preferably selected from: HFIP, chloroform, N,N- dimethylformamide, dichloromethane, dichloroethane, aniline and acetic acid;

- adding to the solution thus obtained an electrolyte, preferably an ionic liquid,

pouring the solution added with electrolyte into a mould and allowing it to stand until the solvent evaporates .

11. The process according to claim 10, wherein said solution added with electrolyte comprises PHA in a concentration comprised between 3% and 20% by weight, the electrolyte in a concentration comprised between 1% and 20% by weight, the percentages being expressed with respect to the weight of the solution.

12. The process according to claim 9, wherein the step wherein the PHA is combined with the electrolyte is carried out by means of electrospinning and comprising the following steps:

- preparing a spinning solution by means of solubilizing the polyhydroxyalkanoate (PHA) , preferably PHB, and of the at least one electrolyte, preferably an ionic liquid, in a solvent, preferably selected from: HFIP, chloroform, N, N-dimethylformamide, dichloromethane, dichloroethane, aniline, acetic acid;

subjecting the spinning solution to an electrospinning process, thus obtaining PHA fibres; depositing the PHA fibres on a collector, so as to obtain a separator.

13. The process according to claim 12, wherein the spinning solution comprises PHA in a concentration comprised between 4% and 10% by weight, the electrolyte in a concentration comprised between 1% and 25% by weight, the percentages being expressed with respect to the weight of the solution.

14. The process according to claim 9, wherein the step wherein the PHA is combined with the electrolyte is carried out by means of electrospraying and comprises the following steps:

preparing a spraying solution by means of solubilizing the polyhydroxyalkanoate (PHA) , preferably PHB, and the at least one electrolyte, preferably an ionic liquid, in a solvent, preferably selected from: HFIP, chloroform, dichloromethane, dichloroethane, aniline, acetic acid;

subjecting the spraying solution to an electrospraying process, thus obtaining PHA particles ;

depositing the PHA particles on a collector, so as to obtain a separator.

15. The process according to claim 14, wherein said spraying solution comprises PHA in a concentration comprised between 4% and 10% by weight, the electrolyte in a concentration comprised between 1% and 25% by weight, the percentages being expressed with respect to the weight of the solution.

16. The process according to claim 8, wherein the step of providing at least one separator comprises producing the separator by means of electrospinning starting from a spinning solution comprising PHA, preferably PHB, and a solvent, preferably selected from: HFIP, chloroform, dichloromethane, dichloroethane, aniline, acetic acid and impregnating the separator with at least one electrolyte, preferably an ionic liquid.