Abstract: A three-chamber electrochemical cell comprises a central chamber, first and second chambers, and a central part for conveying a fluid solution into and out from the central chamber, the central part being symmetric with respect to a mid-plane of the cell. First and second electrodes of the cell are in surface contact with, respectively, first and second membranes. The first and second electrodes are produced from a porous electrically conductive material that absorbs mechanical stresses due to a first pressure differences between the first side chamber and the central chamber, and a second pressure difference between the second side chamber and the central chamber. The first and second electrodes are produced from a material including micrometer-sized metal beads compacted with one another leaving interstices between the beads, which form the pores of said electrodes.

Abstract: The present invention relates to a material for an electrochemical device, especially a fuel cell, an electrolyzer or a storage battery, comprising a matrix and activated boron nitride contained in the matrix.

Abstract: The present invention relates to a material for an electrochemical device, especially a fuel cell, an electrolyzer or a storage battery, comprising a matrix and activated boron nitride contained in the matrix.

Abstract: The present invention relates to an electrolyser for the production of at least one chemical substance, such as hydrogen, oxygen, chlorine or hypochlorous acid, or sodium hydroxide, by electrolysis of pure water or of water containing at least one salt, base and/or acid such as NaCl, H2SO4, KOH or NaOH, comprising a stack of at least a first and a second consecutive electrolytic cells, each electrolytic cell (10) comprising; —an anode, —a cathode, —an ion exchange membrane (11) positioned between the anode and the cathode, the ion exchange membrane (11) of the first electrolytic cell and of the second electrolytic cell being separated by a bipolar electrode (15) constituting on the one hand, the anode of the first electrolytic cell and, on the other hand, the cathode of the second electrolytic cell.

Abstract: A three-chamber eletrochemical cell comprises a central chamber, two lateral chambers, and a central part for conveying a fluid solution into and out from the central chamber, the central part being symmetric with respect to a mid-plane of the cell.

Abstract: A cell of a fuel cell comprises an anode, a cathode, and between the cathode and the anode, a layer of ceramic including activated boron nitride.

Abstract: A method of activating boron nitride comprises exposing the boron nitride to a fluid enabling —OH hydroxyl radicals and/or H3O+ to be delivered and creating B—OH bonds and/or NH2 bonds in the boron nitride, and eliminating the fluid and recovering the activated boron nitride.

Abstract: A device for colliding at least one H+ ion and at least one electron may comprise at least one electromagnetic field generator for extracting the at least one H+ ion from a hydrogen-containing compound and transferring the at least one H+ ion toward a cathode. The device also may comprise at least one non-conductive material positioned between at least a portion of the hydrogen-containing compound and the cathode so that the colliding of the at least one H+ ion and the at least one electron occurs within the non-conductive material.