Abstract: Formation process for a potassium-ion hybrid supercapacitor, the process comprising: a) supplying the potassium-ion hybrid supercapacitor comprising: a negative electrode comprising graphite, a positive electrode comprising activated carbon, an electrolyte comprising a potassium salt, b) charging the supercapacitor at constant current in a protocol of between Cx/50 and Cx/2, to a charge cutoff voltage of between 3.0 V and 3.3 V, c) holding the supercapacitor at the charge cutoff voltage until the leakage current is between Cx/2000 and Cx/500, d) discharging the supercapacitor at constant current in a protocol of between Cx/50 and Cx, to a discharge cutoff voltage of between 0 V and 2 V, where the process further comprises degassing the supercapacitor after one of steps b) to d).

Abstract: A negative electrode for a lithium electrochemical generator, wherein it comprises, as active material, a lithium and calcium alloy, wherein the calcium is present in the alloy to the extent of 2% to 34% of atomic.

Abstract: A lithium-sulfur accumulator comprising at least one electrochemical cell comprising a positive electrode comprising, as active material, at least one sulfur-containing material, a negative electrode and an electrolyte conducting lithium ions disposed between the negative electrode and the positive electrode, wherein the negative electrode comprises, as active material, a lithium and calcium alloy, wherein the calcium is present in the alloy to the extent of 2% to 34% atomic.

Abstract: A lithium-air or lithium-oxygen electrochemical generator comprising at least one electrochemical cell comprising a positive electrode, a negative electrode and an electrolyte conducting lithium ions disposed between the negative electrode and the positive electrode wherein the negative electrode comprises, as active material, a lithium and calcium alloy.

Abstract: A negative electrode for a lithium electrochemical generator, wherein it comprises, as active material, a lithium and calcium alloy, wherein the calcium is present in the alloy to the extent of 2% to 34% of atomic.

Abstract: A lithium-sulfur accumulator comprising at least one electrochemical cell comprising a positive electrode comprising, as active material, at least one sulfur-containing material, a negative electrode and an electrolyte conducting lithium ions disposed between the negative electrode and the positive electrode, wherein the negative electrode comprises, as active material, a lithium and calcium alloy, wherein the calcium is present in the alloy to the extent of 2% to 34% atomic.

Abstract: A lithium-air or lithium-oxygen electrochemical generator comprising at least one electrochemical cell comprising a positive electrode, a negative electrode and an electrolyte conducting lithium ions disposed between the negative electrode and the positive electrod wherein the negative electrode comprises, as active material, a lithium and calcium alloy.

Abstract: An active layer/membrane assembly to be incorporated into a hydrogen production device comprises an active layer in contact with a membrane capable of exchanging ions, the active layer comprising catalyst particles and particles referred to as support particles, wherein the size of the support particles is greater than the thickness of the active layer, so that the support particles emerge from the active layer, at the surface opposite the surface in contact with the membrane. A unit comprising the assembly and a porous current collector, the assembly and the collector having a complementarity of surface finish is provided. A process for manufacturing the assembly is also provided.

Abstract: A method of attachment between a metal collector and a carbon felt of a battery includes the steps of impregnation of the pores of the carbon felt with a mixture of metal powder and of a binder, locally performed in at least one predetermined area of the carbon felt; and spot welding between the metal collector and the carbon felt impregnated with the metal powder, performed at the level of said at least one predetermined area.

Abstract: A liquid cathode cell comprising: a calcium anode; an electrolyte comprising a sulfur and/or phosphorus oxidizing solvent and at least one salt; a cathode comprising a compound identical to the aforementioned oxidizing solvent as active material; characterized in that the cathode comprises a first zone consisting of a carbon matrix comprising entwined carbon fibers having a porosity of at least 90% and a specific surface area less than or equal to 5 m2/g, and comprising a second zone that is distinct from the first zone, wherein the second zone consists of a composite material comprising a binder and carbon black.

Abstract: A process for manufacturing a catalytic electrode includes depositing an electrocatalytic ink on a carrier, wherein the electrocatalytic ink includes an electrocatalytic material and a product polymerizable into a protonically conductive polymer. The process also includes solidifying the electrocatalytic ink so as to form an electrode wherein the composition of the product polymerizable into a protonically conductive polymer and its proportion in the ink is defined so that the electrode formed has a breaking strength greater than 1 MPa. The process further includes separating the electrode formed from the carrier.

Abstract: A method of attachment between a metal collector and a carbon felt of a battery includes the steps of impregnation of the pores of the carbon felt with a mixture of metal powder and of a binder, locally performed in at least one predetermined area of the carbon felt; and spot welding between the metal collector and the carbon felt impregnated with the metal powder, performed at the level of said at least one predetermined area.

Abstract: The invention relates to a liquid cathode battery which comprises: an anode made of calcium; an electrolyte comprising a sulphur-containing and/or phosphorous-containing oxidising solvent and at least one salt; a cathode comprising, as the active material, a compound which is identical to the above-mentioned oxidising solvent, and which comprises a carbon-containing matrix; characterised in that the carbon-containing matrix is a self-supporting matrix which comprises interlaced carbon fibres and which has a porosity of at least 92% and a specific surface area less than 5 m2/g.

Abstract: The invention relates to a liquid cathode cell including: a calcium anode; an electrolyte containing a sulphurous or phosphorous oxidising solvent and at least one salt; and a cathode containing, as an active material, a compound that is identical to the aforementioned oxidising solvent. The invention is characterised in that the salt is a strontium salt which is present in a concentration of from 1.15 mol·L?1 to 3 mol·L?1.

Abstract: A process for manufacturing a catalytic electrode includes depositing an electrocatalytic ink on a carrier, wherein the electrocatalytic ink includes an electrocatalytic material and a product polymerizable into a protonically conductive polymer. The process also includes solidifying the electrocatalytic ink so as to form an electrode wherein the composition of the product polymerizable into a protonically conductive polymer and its proportion in the ink is defined so that the electrode formed has a breaking strength greater than 1 MPa. The process further includes separating the electrode formed from the carrier.

Abstract: An active layer/membrane assembly to be incorporated into a hydrogen production device comprises an active layer in contact with a membrane capable of exchanging ions, the active layer comprising catalyst particles and particles referred to as support particles, wherein the size of the support particles is greater than the thickness of the active layer, so that the support particles emerge from the active layer, at the surface opposite the surface in contact with the membrane. A unit comprising the assembly and a porous current collector, the assembly and the collector having a complementarity of surface finish is provided. A process for manufacturing the assembly is also provided.

Abstract: A process for manufacturing a catalytic electrode includes depositing an electrocatalytic ink on a carrier, wherein the electrocatalytic ink includes an electrocatalytic material and a product polymerizable into a protonically conductive polymer. The process also includes solidifying the electrocatalytic ink so as to form an electrode wherein the composition of the product polymerizable into a protonically conductive polymer and its proportion in the ink is defined so that the electrode formed has a breaking strength greater than 1 MPa. The process further includes separating the electrode formed from the carrier.

Abstract: A method for fabricating a membrane-electrode assembly having a proton-exchange membrane includes supplying a proton-exchange membrane, depositing cathodic electrocatalytic ink on a first face of a first gas diffusion layer, assembling the proton-exchange membrane with the first gas diffusion layer, including securing the first face of the first gas diffusion layer with a first face of the proton-exchange membrane, depositing anodic electrocatalytic ink on a second face of the proton-exchange membrane, the second face being opposite the first face, and assembling the second gas diffusion layer with the membrane, including securing a second face thereof with a first face of the second gas diffusion layer.

Abstract: A membrane-electrode assembly for an electrolysis device includes a proton-exchange membrane, an anode and a cathode disposed on either side of the proton-exchange membrane, a first conductive catalyst disposed within the proton-exchange membrane, and a first conductive junction linking the first conductive catalyst and the cathode. The first conductive junction has an electrical resistance greater than a proton resistance of the membrane between the first conductive catalyst and the cathode.