Abstract: This application describes a process for the preparation of flexible electrode-separator elements or assemblies, which includes the application of an electrode material on the separator. The electrode material comprises graphene, for instance produced by graphite exfoliation. The electrode-separator elements obtained by the process as well as their use in electrochemical cells are also described.

Abstract: A process for recycling an electrode material comprising graphene and an electrochemically active material is described. The process comprises a step of adding, in any order, water and a non-miscible solvent to the electrode material, thereby forming a biphasic system comprising an organic phase and an aqueous phase; and a step of separating and filtering the organic phase to recover graphene. The process optionally comprises additional steps of washing, drying, and/or thermally treating. Also described are electrodes including the recycled graphene, as well as the electrochemical cells and their uses.

Abstract: This application describes a process for the preparation of flexible electrode-separator elements or assemblies, which includes the application of an electrode material on the separator. The electrode material comprises graphene, for instance produced by graphite exfoliation. The electrode-separator elements obtained by the process as well as their use in electrochemical cells are also described.

Abstract: A process for recycling an electrode material comprising graphene and an electrochemically active material is described. The process comprises a step of adding, in any order, water and a non-miscible solvent to the electrode material, thereby forming a biphasic system comprising an organic phase and an aqueous phase; and a step of separating and filtering the organic phase to recover graphene. The process optionally comprises additional steps of washing, drying, and/or thermally treating. Also described are electrodes including the recycled graphene, as well as the electrochemical cells and their uses.

Abstract: A process for fabricating an electrochemical supercapacitor is disclosed herein. The process comprises depositing a carbon nanotube layer onto a first substrate; depositing a layer of metal oxide material onto the substrate forming a first electrode; depositing an electrolytic material onto the electrode; and joining the electrode to a first face of a solid electrolyte membrane such that the electrolytic material is disposed between the electrode and the electrolytic membrane. The carbon nanotubes, the metal oxide and the electrolytic material comprise distinct layers. An electrochemical supercapacitor fabricated by the above-referenced process is also disclosed.

Abstract: A process for fabricating an electrochemical supercapacitor is disclosed herein. The process comprises depositing a carbon nanotube layer onto a first substrate; depositing a layer of metal oxide material onto the substrate forming a first electrode; depositing an electrolytic material onto the electrode; and joining the electrode to a first face of a solid electrolyte membrane such that the electrolytic material is disposed between the electrode and the electrolytic membrane. The carbon nanotubes, the metal oxide and the electrolytic material comprise distinct layers. An electrochemical supercapacitor fabricated by the above-referenced process is also disclosed.

Abstract: An electrochemical method and system for removing nitrate and ammonia in effluents, using an undivided flow-through electrolyzer, said electrolyzer comprising at least one cell, each cell comprising at least one anode and one cathode, the cathode being in a copper/nickel based alloy of a high corrosion resistance and a high electroactivity for nitrate reduction to ammonia and the anode being a DSA electrode of a high corrosion resistance and a high electroactivity for ammonia oxidation to nitrogen in presence of chloride.