A method for manufacturing an electrochemical device, implementing a process for manufacturing a porous electrode having a porous layer deposited on a substrate, the porous layer having a porosity of between 20% and 60% by volume and pores with an average diameter of less than 50 nm. The method includes providing a substrate and a colloidal suspension including aggregates or agglomerates of monodisperse primary nanoparticles of an active electrode material, having an average primary diameter of between 2 and 60 nm, the aggregates or agglomerates having an average diameter of between 50 nm and 300 nm, then depositing a layer from the colloidal suspension on the substrate, then drying and consolidating the layer to obtain a mesoporous layer, and then depositing a coating of an electronically conductive material on and inside the pores of the layer.

A secondary battery is provided. The secondary battery comprises a positive electrode, a solid electrolyte, and a negative electrode, wherein: a stack structure comprising the positive electrode and the solid electrolyte stacked together is provided; the stack structure is bent to provide a bending region therebetween; and the negative electrode is provided within the bending region.

Provided is a metal negative electrode. The metal negative electrode has a first surface and a second surface facing the first surface, and a plurality of grooves may be provided in the first surface.

Provided is a metal negative electrode. The metal negative electrode has a first surface and a second surface facing the first surface, and a plurality of grooves may be provided in the first surface.

The invention relates to a metal-air electrochemical cell comprising a frame (100) defining an electrolyte chamber having an anode side and a cathode side, wherein an air cathode assembly is provided in the cathode side, said air cathode assembly (20) comprising hydrophobic porous film having a first face and a second face, with current collector (21) and catalyst-containing active layer (26) provided on said first face, with the planar dimensions of the catalyst-containing active layer on said first face being smaller than that of said hydrophobic film and said current collector, such that the catalyst-containing active layer does not reach the edges of said hydrophobic film and said current collector, thereby creating a catalyst-free margin (27) on the hydrophobic film (31) and current collector which surrounds the catalyst-containing active layer, and wherein said first face of the hydrophobic film and said frame of the cell arm joined together by thermoplastic (101) applied onto the catalyst-free margin of the hydrophobic film. A method of assembling the metal/air cell is also described.

An electrochemical cell is disclosed. The electrochemical cell comprises an anode side, a cathode side, a separator, and an alkaline aqueous ferric iron salt solution. The alkaline aqueous ferric iron salt solution may be either the catholyte or the anolyte, depending on the electrochemical half-reactions that define the electrochemical cell. The alkaline aqueous ferric iron salt solution comprises one or more anionic ferric iron-carbonate complexes.

An electrochemical cell is disclosed. The electrochemical cell comprises an anode side, a cathode side, a separator, and an alkaline aqueous ferric iron salt solution. The alkaline aqueous ferric iron salt solution may be either the catholyte or the anolyte, depending on the electrochemical half-reactions that define the electrochemical cell. The alkaline aqueous ferric iron salt solution comprises one or more anionic ferric iron-carbonate complexes.

A solid ion conductor compound includes a compound represented by Formula 1:
Li.sub.6−wHf.sub.2−xM.sub.xO.sub.7−yZ.sub.y  Formula 1
where, in Formula 1, M is an element having an oxidation number of a and a is 5, 6, or a combination thereof, Z is an element having an oxidation number of −1, and 0<x<2, 0≤y≤2, and 0<w<6 and w=[(a−4)×x]+y.

A solid ion conductor compound includes a compound represented by Formula 1:
Li.sub.6−wHf.sub.2−xM.sub.xO.sub.7−yZ.sub.y  Formula 1
where, in Formula 1, M is an element having an oxidation number of a and a is 5, 6, or a combination thereof, Z is an element having an oxidation number of −1, and 0<x<2, 0≤y≤2, and 0<w<6 and w=[(a−4)×x]+y.

The invention relates to electrochemical current sources, more particularly to metal-air current sources, and even more particularly to lithium-air current sources and their electrodes. A cathode comprises a base made of a porous electrically conducting material that is permeable to molecular oxygen, the working surface of which has a copolymer applied thereto, which is produced by the copolymerization of a monomeric transition metal coordination complex having a Schiff base and a thiophene group monomer. The monomeric transition metal coordination complex having a Schiff base can be, for example, a compound of the [M(R,R′-Salen)], [M(R,R′-Saltmen)] or [M(R,R′-Salphen)] type, and the thiophene group monomer can be a compound selected from a thiophene group consisting of 3-alkylthiophenes, 3,4-dialkylthiophenes, 3,4-ethylenedioxythiophene or combinations thereof. A current source comprises the described cathode and an anode made from an active metal, in particular lithium, wherein the cathode and the anode are separated by an electrolyte containing ions of the metal from which the anode is made. It has been established that in this system, the copolymer exhibits the properties of an effective catalyst. The technical result is an increase in the specific energy, specific power and number of charge and discharge cycles of a metal-air current source.