Abstract: A process for activating the surface of an electrode based on DLC amorphous carbon by an electrochemical treatment including at least the following steps (i) and (ii), carried out in this order: (i) applying, to the electrode, an electrical excitation in the form of an alternation of cathodic and anodic electrical pulses, these being current or voltage pulses, in contact with an aqueous electrolyte including at least one oxidizing species of a redox pair having a standard potential, at ambient temperature and atmospheric pressure, denoted E0, strictly greater than 0, and at least one base salt; and (ii) applying, to the electrode that was previously subjected to step (i), an electrical excitation in the form of an alternation of cathodic and anodic electrical pulses, these being voltage pulses, in contact with an aqueous electrolyte devoid of electroactive species.

Abstract: A method for producing a polymer membrane for the potentiometric detection of an analyte, the method comprising the following successive steps: providing a formulation comprising a dissolved polymer, an ion exchanger, an ionophore, optionally a plasticiser, and a solvent selected from glycol ethers and acetates thereof, and glycol diacetates, depositing the formulation on a support, for example a transducer, and evaporating the solvent, so as to form a polymer membrane.

Abstract: The present invention relates to a gas diffusion layer for a fuel cell, made of a carbon substrate grafted with at least one aromatic group having formula (II): wherein: the asterisk * designates a carbon atom with no hydrogen and no Ri group, with i=1 to 5, and covalently bonded to the carbon substrate; at least two of the R1, R2, R3, R4, and R5 groups are different from a hydrogen atom; at least two of the R1, R2, R3, R4, and R5 groups are hydrophobic groups or hydrophilic groups or a hydrophobic group and a hydrophilic group.

Abstract: A method of treating a carbon substrate, includes the successive steps of impregnating the carbon substrate with an aqueous solution containing an amorphous fluorinated copolymer of tetrafluoroethylene and of perfluoromethoxy dioxole, drying the carbon substrate at a pressure lower than the atmospheric pressure, and obtaining a carbon substrate impregnated with a fluorinated copolymer. Such a carbon substrate may be used as a gas diffusion layer in a fuel cell.

Abstract: A lithium-ion accumulator successively includes a first current collector; a negative electrode in contact with the first current collector; an electrode separator comprising an electrolyte, in contact with the negative electrode; a positive electrode in contact with the electrode separator; and a second current collector in contact with the positive electrode. The second current collector is made of aluminum covalently grafted with at least one phenyl aromatic group C6(Ri)5, in which formula: Ri designates R1, R2, R3, R4 and R5 which are independently from one another selected from the group including: C(?O)O—Y+; SO3?Y+; CH2—SO3?Y+; NR3+X?; OH; PO3H?Y+; H; F; CnF2n+1; CnH2n+1; NO2; —O—CH2—O—; imidazole groups; and derivatives of imidazole groups; with Y?H, Na, K, Li, NR?4; X?F, Cl, Br, I; n being an integer in the range from 1 to 10; R?CmH2m+1; R??H, CmH2m+1 and mixtures thereof, m being an integer in the range from 1 to 10; at least two groups Ri being different from H.

Abstract: The present invention relates to a gas diffusion layer for a fuel cell, made of a carbon substrate grafted with at least one aromatic group having formula (II): wherein: the asterisk * designates a carbon atom with no hydrogen and no Ri group, with i=1 to 5, and covalently bonded to the carbon substrate; at least two of the R1, R2, R3, R4, and R5 groups are different from a hydrogen atom; at least two of the R1, R2, R3, R4, and R5 groups are hydrophobic groups or hydrophilic groups or a hydrophobic group and a hydrophilic group.

Abstract: A method of treating a carbon substrate, includes the successive steps of impregnating the carbon substrate with an aqueous solution containing an amorphous fluorinated copolymer of tetrafluoroethylene and of perfluoromethoxy dioxole, drying the carbon substrate at a pressure lower than the atmospheric pressure, and obtaining a carbon substrate impregnated with a fluorinated copolymer. Such a carbon substrate may be used as a gas diffusion layer in a fuel cell.

Abstract: A lithium-ion accumulator successively includes a first current collector; a negative electrode in contact with the first current collector; an electrode separator comprising an electrolyte, in contact with the negative electrode; a positive electrode in contact with the electrode separator; and a second current collector in contact with the positive electrode. The second current collector is made of aluminum covalently grafted with at least one phenyl aromatic group C6(Ri)5, in which formula: Ri designates R1, R2, R3, R4 and R5 which are independently from one another selected from the group including: C(?O)O—Y+; SO3?Y+; CH2—SO3?Y+; NR3+X?; OH; PO3H?Y+; H; F; CnF2n+1; CnH2n+1; NO2; —O—CH2—O—; imidazole groups; and derivatives of imidazole groups; with Y?H, Na, K, Li, NR?4; X?F, Cl, Br, I; n being an integer in the range from 1 to 10; R?CmH2m+1; R??H, CmH2m+1 and mixtures thereof, m being an integer in the range from 1 to 10; at least two groups Ri being different from H.